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Selection guide Monitor and Processing

Preventa safety modules

Applications
Modules	For Emergency stop and switch monitoring	For Emergency stop and protective guard applications	For Emergency stop and switch monitoring	For Emergency stop, switch or solid-state output safety light curtain monitoring	For Emergency stop, switch, sensing mat/ edges or solid-state output safety light curtain monitoring
Maximum achievable safety level	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 (instantaneous safety outputs) and PLd/ Category 3 (time delay safety outputs) conforming to EN/ISO 13849-1, SILCL3 (instantaneous safety outputs) and SILCL2 (time delay safety outputs) conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN ISO 13849-1, SILCL3 conforming to EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 (instantaneous safety outputs) and PLd/Category 3 (time delay safety outputs) conforming to EN/ISO 13849-1, SILCL3 (instantaneous safety outputs) and SILCL2 (time delay safety outputs) conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061
Conformity to standards	EN/IEC 60204-1, EN 1088/ISO 14119, EN/ISO 13850, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN 1088/ISO 14119, EN/ISO 13850, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN/ISO 13850, EN 1088/ISO 14119, EN/IEC 60947-1, EN/IEC 60947-5-1	EN 62061 EN ISO 13849-1 EN 50156-1 EN 60204-1 EN/IEC 61496-1 EN/IEC 60947-5-1	EN/IEC 60204-1, EN 1088/ISO 14119, EN/ISO 13850, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1, EN/ISO 13850, EN 1088/ISO 14119	EN/IEC 60204-1, EN 1088/ISO 14119, EN/ISO 13850, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN 1088/ISO 14119, EN/ISO 13850, EN/IEC 60947-1, EN/IEC 60947-5-1, EN/IEC 61496-1 (type 4)	EN/IEC 60204-1, EN 1088/ISO 14119, EN/ISO 13850, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN 1088/ISO 14119, EN/ISO 13850, EN/IEC 60947-1, EN/IEC 60947-5-1
Product certifcations	UL, CSA, TÜV	UL, CSA, BG	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, BG	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, TÜV
Number of circuits
Safety	3 NO	3 NO	2 NO instantaneous + 3 NO time delay	3 NO instantaneous + 3 NO time delay	3 NO instantaneous + 3 NO time delay	2 NO instantaneous + 1 NO time delay	3 NO	7 NO	3 NO instantaneous
Additional	1 solid-state output for signalling to PLC	1 relay output for signalling to PLC	4 solid-state outputs for signalling to PLC	1 NC	3 solid-state outputs for signalling to PLC	–	–	2 NC + 4 solid-state outputs for signalling to PLC	1 NC + 4 solid-state outputs for signalling to PLC
Display	2 LEDs	2 LEDs	4 LEDs	5 LEDs	11 LEDs	3 LEDs	3 LEDs	4 LEDs	4 LEDs
Supply voltage	a and 24 V c 48 V a 115 V a 230 V a	a and 24 V c	a and 24 V c 115 V a 230 V a	c 24 V a 115…230 V	24 V c	24 V c	a and 24 V c	a and 24 V c 115 V a and 24 V c 230 V a and 24 V c	a and 24 V c 48 V a 110 V a and 24 V c 120 V a and 24 V c 230 V a and 24 V c
Synchronisation time between inputs	Unlimited	Unlimited	75 ms (automatic start)	1	Unlimited or 1.5 s (depending on wiring)	Unlimited	Unlimited	Unlimited or 2 s, 4 s (depending on wiring)
Input channel voltage
24 V/48 V version	a and 24 V c/48 V a	24 V c	24 V c/–	24 V c/–	24 V c/–	24 V c/–	c 24 V/–	24 V c/–	24 V c/–
24 V/48 V or 110 V/120 V/230 V version	115 V a/230 V –	–	48 V a/48 V –	24 V c/–	– –	––	––	24 V a/24 V –	– 24 V c/24 V/24 V
Module type	XPSAC	XPSAXE	XPSATE	XPSATR	XPSAV	XPSABV	XPSAF	XPSAFL	XPSAR	XPSAK
Pages	3/74	3/74	3/75	3/76	3/75	3/75	3/77	3/78	3/79	3/80

9
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10
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10
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Selection guide (continued) Monitor and Processing
Preventa safety modules

Applications
Modules	For enabling switch monitoring	For electrical monitoring of two-hand control stations	For control of 1 to 4 single-beam photo-electric sensors XU2 S (transmitter receiver pair)	For monitoring type 2 and type 4 light curtains Compact and slim ranges	For extending the number of safety contacts
Maximum achievable safety level	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/ IEC 61508 and EN/IEC 62061	PLc/Category 1 conforming to EN/ISO 13849-1 SILCL1 conforming to EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLc/Category 2 conforming to EN/ISO 13849-1, SILCL1 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061 (when connected to the appropriate module)	PLe/Category 4 conforming to EN/ISO 13849-1, SILCL3 conforming to EN/IEC 61508 and EN/IEC 62061 (when connected to the appropriate module)
Conformity to standards	EN/IEC 60204-1, EN 61326, EN/IEC 60947-1, EN/IEC 60947-5-1	EN 574 type III A, EN/IEC 60204-1, EN/IEC 60947-5-1, EN 62061	EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1, EN 574 type III C/ISO 13851	EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1, EN 574 type III C/ISO 13851	EN/IEC 61496-1, EN/IEC 61496-2, EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 61496-1, EN/IEC 61496-2, EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1
Product certifcations	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, BG	UL, CSA, TÜV	UL, CSA, IFA	UL, CSA, TÜV	UL, CSA, BG	UL, CSA, TÜV
Number of circuits
Safety	2 NO	1 NO	2 NO	2 NO	2 NO	2 solid-state	4 NO	8 NO
Additional	2 solid-state outputs for signalling to PLC	1 NC	1 NC	2 solid-state outputs for signalling to PLC	4 solid-state PNP NO outputs for signalling to PLC	1 PNP + 1 NPN output for signalling to PLC	2 NC	1 NC
Display	3 LEDs	2 LEDs	3 LEDs	3 LEDs	4 LEDs	14 LEDs + 2-digit display	2 LEDs	3 LEDs
Supply voltage	24 V c	a and 24 V c 115/230 V a	a and 24 V c 115/120 V a 230 V a	24 V c	24 V c	24 V c	a and 24 V c	a and 24 V c 115 V a 230 V a
Synchronisation time between inputs	–	500 ms	500 ms	500 ms	–	3 s or infnite	–	–
Input channel voltage
24 V/48 V version	24 V/–	24 V c/–	24 V c	24 V c/–	–	–	–	–
115 V/230 V version	–	24 V a/24 V	–	–	–	–	–	–
Module type	XPSVC	XPSBAE	XPSBCE	XPSBF	XPSCM	XPSLCM	XPSECME	XPSECPE
Pages	3/81	3/82	3/82	3/82	3/83	3/84	3/85	3/85

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Selection guide (continued) Monitor and Processing
Preventa safety modules

Applications
Modules	For the monitoring of applications requiring safety time delays	For coded magnetic switch monitoring	For zero speed detection of AC or DC motors which produce a remanent voltage in their windings due to residual magnetism	For lift control	For dynamic monitoring of hydraulic valves on linear presses	For dynamic monitoring of double-bodied solenoid valves	For safety stop at top dead centre with automatic overtravel monitoring and control
For 2 max.	For 6 max.
Maximum achievable safety level	PL d/Category 3 conforming to EN/ISO 13849-1, SILCL 2 conforming to EN/IEC 62061	PL d/Category 3 conforming to EN/ISO 13849-1, SILCL 2 conforming to EN/IEC 62061	PL e/Category 4 conforming to EN/ISO 13849-1 SILCL 3 conforming to EN/IEC 62061	PL e/Category 4 conforming to EN/ISO 13849-1 SILCL 3 conforming to EN/IEC 62061	PL d/Category 3 conforming to EN/ISO 13849-1, SILCL 2 conforming to EN/ IEC 62061,	PL e/Category 4 conforming to EN/ISO 13849-1, SILCL 3 conforming to EN/ IEC 62061	PL e/Category 4 conforming to EN/ISO 13849-1, SILCL 3 conforming to EN/ IEC 62061	PL e/Category 4 conforming to EN/ISO 13849-1, SILCL 3 conforming to EN/ IEC 62061	PL e/Category 4 conforming to EN/ISO 13849-1, SILCL 3 conforming to EN/ IEC 62061
Conformity to standards	EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1	EN/IEC 60204-1, EN 1088/ISO 14119, EN/IEC 60947-1, EN/IEC 60947-5-1, EN/IEC 60947-5-3	EN/IEC 60204-1, EN 1088/ISO 14119, EN/IEC 60947-1, EN/IEC 60947-5-1, EN/IEC 60947-5-3	EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1	EN 81-1, EN 81-2, EN/IEC 60947-5-1, EN 12015, EN 12016	EN 693, EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1	EN 692, EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1	EN 692, EN/IEC 60204-1, EN/IEC 60947-1, EN/IEC 60947-5-1
Product certifcations	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, TÜV	TÜV	UL, CSA, TÜV	UL, CSA, TÜV	UL, CSA, TÜV
Number of circuits
Safety	1 NO time delayed	1 NO pulse type	2 NO	1 NO + 1 NC	2 NO	2 NO + 1 NC	1 NO + 1 NC	3 NO
Additional	2 NC + 2 solid-state outputs for signalling to PLC	2 solid-state outputs for signalling to PLC	2 solid-state outputs for signalling to PLC	–	4 solid-state outputs for signalling to PLC
Display	4 LEDs	3 LEDs	15 LEDs	4 LEDs	4 LEDs	8 LEDs
Supply voltage	a and 24 V c 115 V a 230 V a	c 24 V	24 V c 115 V a 230 V a	a and 24 V c	24 V c	24 V c 115 V a 230 V a	– 115 V a 230 V a
Synchronisation time between inputs	–	–	500 ms	–	Infnite	–	–	–
Module type	XPSTSA	XPSTSW	XPSDMB	XPSDME	XPSVNE	XPSEDA	XPSPVT	XPSPVK	XPSOT
Pages	3/86	3/86	3/87	3/87	3/88	3/89	3/90	3/91	3/93

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Operating principle,
references
Monitor and Processing
Preventa safety modules types XPSAC,
XPSAXE
For Emergency stop and switch monitoring

Operating principle

Safety modules XPSAC and XPSAXE are used for monitoring Emergency stop circuits conforming to standards EN/ISO 13850 and EN/IEC 60204-1 and also meet the safety requirements for the electrical monitoring of switches in protective devices conforming to standard EN/ISO 14119. They provide protection for both the machine operator and the machine by immediately stopping the dangerous movement on receipt of a stop instruction from the operator, or on detection of a fault in the safety circuit itself. To aid diagnostics, the modules have LEDs which provide information on the monitoring circuit status. b The XPSAC module has 3 safety outputs and a solid-state output for signalling to the PLC. b The XPSAXE module has 3 safety outputs and a relay output for signalling to the PLC

References
Description	Connection	Number of instantaneous opening safety circuits	Additional outputs	Supply	Reference	Weight kg/ lb
Safety modules for Emergency stop and switch monitoring	Captive screw clamp terminals Terminal block integrated in module	3	1 solid-state	a and c 24 V	XPSAC5121	0.160/ 0.353
a 48 V	XPSAC1321	0.210/ 0.463
a 115 V	XPSAC3421	0.210/ 0.463
a 230 V	XPSAC3721	0.210/ 0.463
Captive screw clamp terminals Terminal block removable from module	3	1 solid-state	a and c 24 V	XPSAC5121P	0.160/ 0.353
a 48 V	XPSAC1321P	0.210/ 0.463
a 115 V	XPSAC3421P	0.210/ 0.463
a 230 V	XPSAC3721P	0.210/ 0.463
1 relay	a and c 24 V	XPSAXE5120P	0.229/ 0.505
Spring terminals Terminal block removable from module	3	1 relay	a and c 24 V	XPSAXE5120C	0.229/ 0.505

XPSAXE5120P
XPSAXE5120C
XPSACppppP
XPSACpppp
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10
3/75
Operating principle,
references
Monitor and Processing
Preventa safety modules types XPSAV,
XPSABV, XPSATE
For Emergency stop and switch monitoring

Operating principle

Safety modules XPSAV, XPSABV and XPSATE are used for monitoring Emergency stop circuits conforming to standards EN/ISO 13850 and EN/IEC 60204-1 and also meet the safety requirements for the electrical monitoring of switches in protection devices conforming to standard EN/ISO 14119. They provide protective for both the machine operator and the machine by immediately stopping the dangerous movement on receipt of a stop instruction from the operator, or on detection of a fault in the safety circuit itself. In addition to the stop category 0 instantaneous opening safety outputs (3 for XPSAV, 2 for XPSABV and 2 for XPSATE), the modules incorporate stop category 1 time delay outputs (3 for XPSAV, 1 for XPSABV and 3 for XPSATE) which allow for controlled deceleration of the motor components until a complete stop is achieved (for example, motor braking by variable speed drive). At the end of the preset delay, the supply is disconnected by opening the time delay output circuits. b For module XPSAV, the time delay of the 3 output circuits is adjustable, in 15 preset values, between 0 and 300 seconds using selector buttons. b For module XPSABV, the time delay of the 3 output circuits is adjustable between 0.15 and 3 seconds or 1.5 and 30 seconds, depending on the model, using a selector switch. b For module XPSATE, the time delay of the 3 output circuits is adjustable between 0 and 30 seconds using a 12-position selector switch. Module XPSAV also incorporates 3 solid-state signalling outputs for signalling to the process PLC. Module XPSATE incorporates 4 solid-state signalling outputs for signalling to the process PLC. To aid diagnostics, the modules have LEDs which provide information on the monitoring circuit status. The Start button monitoring function is confgurable depending on the wiring.

References
Description	Connection	Number of safety circuits	Additional outputs	Setting range of time delay	Supply	Reference	Weight kg/ lb
Safety modules for Emergency stop and switch monitoring	Captive screw clamp terminals Terminal block integrated in module	6 NO (3 NO time delay)	3 solid-state	0…300 s	c 24 V	XPSAV11113	0.320/ 0.705
Captive screw clamp terminals Terminal block removable from module	6 NO (3 NO time delay)	3 solid-state	0…300 s	c 24 V	XPSAV11113P	0.320/ 0.705
Captive screw clamp terminals Terminal block integrated in module	6 NO (3 NO time delay)	3 solid-state	0…300 s (Start delay 0,5 s)	c 24 V	XPSAV11113T050	0.320/ 0.705
6 NO (3 NO time delay)	3 solid-state	0.1 …2 s	c 24 V	XPSAV11113Z002	0.320/ 0.705
3 NO (1 NO time delay)	–	0,15…3 s	c 24 V	XPSABV1133P	0.280/ 0.617
Captive screw clamp terminals Terminal block removable from module
Spring terminals Terminal block removable from module	3 NO (1 NO time delay)	–	0,15…3 s	c 24 V	XPSABV1133C	0.275/ 0.606
Captive screw clamp terminals Terminal block removable from module	3 NO (1 NO time delay)	–	1,5…30 s	c 24 V	XPSABV11330P	0.280/ 0.617
Spring terminals Terminal block removable from module	3 NO (1 NO time delay)	–	1,5…30 s	c 24 V	XPSABV11330C	0.275/ 0.606
Captive screw clamp terminals Terminal block integrated in module	5 NO (3 NO time delay)	4 solid-state	0…30 s	a and c 24 V	XPSATE5110	0.280/ 0.617
Captive screw clamp terminals Terminal block removable from module	5 NO (3 NO time delay)	4 solid-state	0…30 s	a and c 24 V	XPSATE5110P	0.280/ 0.617
Captive screw clamp terminals Terminal block integrated in module	5 NO (3 NO time delay)	4 solid-state	0…30 s	a 115 V	XPSATE3410	0.380/ 0.838
Captive screw clamp terminals Terminal block removable from module	5 NO (3 NO time delay)	4 solid-state	0…30 s	a 115 V	XPSATE3410P	0.380/ 0.838
Captive screw clamp terminals Terminal block integrated in module	5 NO (3 NO time delay)	4 solid-state	0…30 s	a 230 V	XPSATE3710	0.380/ 0.838
Captive screw clamp terminals Terminal block removable from module	5 NO (3 NO time delay)	4 solid-state	0…30 s	a 230 V	XPSATE3710P	0.380/ 0.838

XPSABVppppP
XPSABVppppC
XPSAV11113
XPSAV11113P
XPSATE5110
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10
3/76
Operating principle,
references
Monitor and Processing
Preventa safety module type XPSATR
For Emergency stop and protective guard applications

Operating principle

Safety modules XPSATR meet the requirements of Performance Level PL e/Category 4 conforming to standard EN ISO 13849-1. Safety modules XPSATR are electronic, redundant and self-monitoring devices with positively driven relays. They are used for monitoring Emergency stop circuits (single or two-channel) and protective guard applications. The modules are conforming to standards EN/ISO 13850 and EN 60204-1. They provide protection for both the machine operator and the machine by immediately stopping the dangerous movement on receipt of a stop instruction from the operator, or on detection of a fault in the safety circuit itself. XPSATR incorporate 3 NO and 1 NC not delayed contacts and 3 delayed NO contacts. To aid diagnostics, the modules have 5 LEDs on the front face which provide information on the monitoring circuit status.

References
Description	Connection	Number of safety circuits	Additional outputs	Time setting range	Supply	Reference	Weight kg/ lb
Safety modules for emergency stop and safety guards monitoring	Captive screw clamp terminals Terminal block removable from module	3 NO + 3 NO time delay	1 NC	0.1…3 s	c 24 V	XPSATR1153P	0.330/ 0.728
0.1…3 s	a 115…230 V	XPSATR3953P	0.350/ 0.772
0…30 s	c 24 V	XPSATR11530P	0.330/ 0.728
0…30 s	a 115…230 V	XPSATR39530P	0.350/ 0.772
Cage clamp terminals Terminal block removable from module	3 NO + 3 NO time delay	1 NC	0.1…3 s	c 24 V	XPSATR1153C	0.330/ 0.728
0.1…3 s	a 115…230 V	XPSATR3953C	0.350/ 0.772
0…30 s	c 24 V	XPSATR11530C	0.330/ 0.728
0…30 s	a 115…230 V	XPSATR39530C	0.350/ 0.772

XPSATRppppP
XPSATRppppC
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10
3/77
Operating principle,
references
Monitor and Processing
Preventa safety modules type XPSAF
For Emergency stop and switch monitoring

Operating principle

Safety modules XPSAF meet the requirements of Performance Level PL e/Category 4 conforming to standard EN/ISO 13849-1. They are used for: b Monitoring Emergency stop circuits conforming to standards EN/ISO 13850 and EN/IEC 60204-1. b Electrical monitoring of switches activated by protection devices conforming to standard EN/ISO 14119. Housed in a compact enclosure, the modules have 3 safety outputs. Preventa safety modules XPSAFppppP incorporate removable terminal blocks, thus optimising machine maintenance. To aid diagnostics, the modules have 3 LEDs on the front face which provide information on the monitoring circuit status. The Start button monitoring function is confgurable depending on the wiring.

References
Description	Connection	Number of safety circuits	Supply	Reference	Weight kg/ lb
Safety modules for Emergency stop and switch monitoring	Captive screw clamp terminals Terminal block integrated in module	3	a and c 24 V	XPSAF5130	0.250/ 0.551
Captive screw clamp terminals Terminal block removable from module	3	a and c 24 V	XPSAF5130P	0.250/ 0.551

XPSAF5130
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10
3/78
Operating principle,
references
Monitor and Processing
Preventa safety modules type XPSAFL
For Emergency stop, switch and safety light curtain
monitoring

Operating principle

Safety modules XPSAFL meet the requirements of Performance Level PL e/Category 4 conforming to standard EN/ISO 13849-1. They are used for: b Monitoring Emergency stop circuits conforming to standards EN/ISO 13850 and EN/IEC 60204-1. b Electrical monitoring of switches activated by protection devices conforming to standard EN/ISO 14119. They can also be used for monitoring type 4 light curtains conforming to EN 61496-1 that have solid-state safety outputs (for example, light curtains type XUS L, see page 30304-EN/2). This system conforms to Performance Level PL e/Category 4 in accordance with EN/ISO 13849-1. Housed in a compact enclosure, the modules have 3 safety outputs. Preventa safety modules XPSAFLppppP incorporate removable terminal blocks, thus optimising machine maintenance. To aid diagnostics, the modules have 3 LEDs on the front face which provide information on the monitoring circuit status. The Start button monitoring function is confgurable depending on the wiring.

References
Description	Connection	Number of safety circuits	Supply	Reference	Weight kg/ lb
Safety modules for Emergency stop, switch and safety light curtain monitoring	Captive screw clamp terminals Terminal block integrated in module	3	a and c 24 V	XPSAFL5130	0.250/ 0.551
Captive screw clamp terminals Terminal block removable from module	3	a and c 24 V	XPSAFL5130P	0.250/ 0.551

XPSAFL5130
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10
3/79
Operating principle,
references
Monitor and Processing
Preventa safety modules type XPSAR
For Emergency stop, switch or safety light curtain
monitoring

Operating principle

Safety modules XPSAR meet the requirements of Performance Level PL e/ Category 4 conforming to standard EN/ISO 13849-1 and are designed for the following safety applications: b Monitoring Emergency stop circuits conforming to EN/ISO 13850 and EN/IEC 60204-1. b Electrical monitoring of switches activated by protection devices conforming to standard EN/ISO 14119. b Monitoring type 4 light curtains conforming to EN/IEC 61496-1 that have solid-state safety outputs with test function (light curtains XUS L). In addition to 7 safety outputs, modules XPSAR incorporate 2 relay signalling outputs and 4 solid-state signalling outputs for signalling to the process PLC. Safety modules XPSARppppppP incorporate removable terminal blocks, thus optimising machine maintenance. To aid diagnostics, the modules have 4 LEDs on the front face which provide information on the monitoring circuit status. The Start button monitoring function is confgurable depending on the wiring.

References
Description	Connection	Number of safety circuits	Additional outputs/ solid-state outputs to PLC	Supply	Reference	Weight kg/ lb
Safety modules for Emergency stop, switch or safety light curtain monitoring	Captive screw clamp terminals, Terminal block integrated in module	7	2 / 4	a and c 24 V	XPSAR311144	0.300/ 0.661
a 115 V c 24 V	XPSAR351144	0.400/ 0.882
a 230 V c 24 V	XPSAR371144	0.400/ 0.882
Captive screw clamp terminals, Terminal block removable from module	7	2 / 4	a and c 24 V	XPSAR311144P	0.300/ 0.661
a 115 V c 24 V	XPSAR351144P	0.400/ 0.882
a 230 V c 24 V	XPSAR371144P	0.400/ 0.882

XPSAR3p1144
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10
3/80
Operating principle,
references
Monitor and Processing
Preventa safety modules type XPSAK
For Emergency stop, switch, sensing mat/edges
or safety light curtain monitoring

Operating principle

Safety modules XPSAK meet the requirements of Performance Level PL e/Category 4 conforming to standard EN/ISO 13849-1. They are used for: b Monitoring Emergency stop circuits conforming to standards EN/ISO 13850 and EN/IEC 60204-1. b Electrical monitoring of switches activated by protection devices, with optional selection of synchronisation time between signals. b Monitoring 4-wire sensing mats or edges. b Monitoring type 4 light curtains conforming to EN/IEC 61496-1 which have solid-state safety outputs with test function (light curtains XUSL). Housed in a compact enclosure, the modules have 3 safety outputs, a relay signalling output and 4 solid-state signalling outputs for signalling to the process PLC. Preventa safety modules XPSAKppppP incorporate removable terminal blocks, thus optimising machine maintenance. To aid diagnostics, the modules have 4 LEDs on the front face which provide information on the monitoring circuit status. The Start button monitoring function is confgurable depending on the wiring.

References
Description	Connection	Number of safety circuits	Additional outputs / Solid-state outputs for PLC	Supply	Reference	Weight kg/ lb
Safety modules for Emergency stop, switch, sensing mat/edges or safety light curtain monitoring	Captive screw clamp terminals Terminal block integrated in module	3	1 / 4	a and c 24 V	XPSAK311144	0.300/ 0.661
a 110 V c 24 V	XPSAK361144	0.400/ 0.882
a 120 V c 24 V	XPSAK351144	0.400/ 0.882
a 230 V c 24 V	XPSAK371144	0.400/ 0.882
Captive screw clamp terminals Terminal block removable from module	3	1 / 4	a and c 24 V	XPSAK311144P	0.300/ 0.661
a 48 V	XPSAK331144P	0.300/ 0.661
a 110 V c 24 V	XPSAK361144P	0.400/ 0.882
a 120 V c 24 V	XPSAK351144P	0.400/ 0.882
a 230 V c 24 V	XPSAK371144P	0.400/ 0.882

XPSAK3p1144
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Operating principle,
references
Monitor and Processing
Preventa safety modules type XPSVC
For enabling switch monitoring

Operating principle

The enabling grip switch system, comprising an enabling switch XY2AU and a monitoring module XPSVC, enables authorised personnel to carry out adjustment, programming or maintenance operations within hazardous zones of machines providing certain conditions are met. To be accessible, such operations are often carried out at reduced speed, and must be intentionally selected by authorised persons by means of a selector switch or key switch. Once the selection is made, the enabling switch system temporarily takes over from the hazardous zone’s usual protection measures. Caution: The enabling switch system alone must not cause dangerous movements of the machine to be activated; a second intentional control action on the part of the operator is required. In addition, each person remaining in the hazardous zone must be provided with an individual enabling switch to ensure their own safety.

References
Description	Connection	Number of safety circuits	Solid-state outputs for PLC	Supply	Reference	Weight kg/ lb
Safety modules for enabling switch monitoring	Captive screw clamp terminals Terminal block integrated in module	2 NO	2	c 24	XPSVC1132	0.250/ 0.551
Captive screw clamp terminals Terminal block removable from module	2 NO	2	c 24	XPSVC1132P	0.250/ 0.551

XPSVC1132
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10
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Operating principle

Two-hand control stations are designed to provide protection against hand injury. They require machine operators to keep their hands clear of the dangerous movement zone. The use of two-hand control is an individual protective measure, which can safely protect only one operator. Separate two-hand control stations must be provided for each operator in a multiple-worker environment. Safety modules XPSBAE, BCE and BF for two-hand control stations comply with the requirements of European standard EN 574/ISO 13851 for two-hand control systems. The control stations must be designed and installed such that they cannot be activated involuntarily or easily rendered inoperative. Depending on the application, the requirements of type C standards specifc to the machinery involved must be met (additional personal protection methods may have to be considered). To initiate a dangerous movement, both operators (two-hand control pushbuttons) must be activated within an interval y 0.5 s (synchronous activation). If one of the two pushbuttons is released during a dangerous operation, the control sequence is cancelled. Resumption of the dangerous operation is possible only if both pushbuttons are returned to their initial position and reactivated within the required time interval. The safety distance between the control units and the hazardous zone must be suffcient to ensure that when only one operator is released, the hazardous zone cannot be reached before the dangerous movement has been completed or stopped.

Selection
Requirements of standard EN 574/ISO 13851	Type I	Type II	Type III
A	B	C
Standard EN 574/ ISO 13851 defnes the selection of two-hand controls according to its behavior. The following table details the 3 types of two-hand control conforming to EN 574/ISO 13851. For each type, it lists the operating characteristics and minimum requirements.	Use of both hands (simultaneous action)
Link between input and output signals
Output signal inhibited
Prevention of accidental operation
Tamper-proof
Output signal reinitialised
Synchronous action (specifed time limit)
Use of proven components (Category 1 conforming to EN/ISO 13849-1)	XPSBAE
Redundancy with partial error detection (Category 3 conforming to EN/ISO 13849-1)	XPSBCE XPSBF
Redundancy + Self-monitoring (Category 4 conforming to EN/ISO 13849-1)	XPSBCE XPSBF
Two-hand control station	XY2SBpp
Conforming to standard EN/ISO 13849-1	Meets the requirements of standard EN 574/ISO 13851

References
Description	Type conforming to standard EN 574	Connection	Number of safety circuits	Additional outputs	Supply	Reference	Weight kg/ lb
Safety modules for electrical monitoring of two-hand control stations	III A	Captive screw clamp terminals Terminal block removable from module	1 NO	1 NC	a and 24 V c	XPSBAE5120P	0.100/ 0.220
a 115/230V	XPSBAE3920P	0.100/ 0.220
Spring terminals Terminal block removable from module	1 NO	1 NC	a and 24 V c	XPSBAE5120C	0.100/ 0.220
a 115/230V	XPSBAE3920C	0.100/ 0.220
III C	Captive screw clamp terminals Terminal block removable from module	2 NO	1 NC relay	a and 24 V c	XPSBCE3110P	0.272/ 0.600
a 115/120 V	XPSBCE3410P	0.322/ 0.710
a 230 V	XPSBCE3710P	0.322/ 0.710
Spring terminals Terminal block removable from module	2 NO	1 NC relay	a and 24 V c	XPSBCE3110C	0.272/ 0.600
a 115 /120 V	XPSBCE3410C	0.322/ 0.710
a 230 V	XPSBCE3710C	0.322/ 0.710
Captive screw clamp terminals Terminal block removable from module	2 NO	2 solid-state	c 24 V	XPSBF1132	0.150/ 0.331
2 NO	2 solid-state	c 24 V	XPSBF1132P	0.150/ 0.331

Operating principle,
selection,
references
Monitor and Processing
Preventa safety modules types XPSBAE,
XPSBCE, XPSBF
For electrical monitoring of two-hand control stations
XPSBCEppppP
XPSBCEppppC
XPSBF1132
XPSBAEppppP
XPSBAEppppC
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10
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Operating principle

XPSCM safety modules used in conjunction with XU2S single-beam photo-electric sensors (periodically tested), establish a category 2 light curtain conforming to IEC/EN 61496 parts 1 and 2. The connection of 1 to 4 pairs of XU2S photo-electric sensors makes it possible to create a protected zone up to 1200 mm high conforming to EN 999/ISO 13855 and 8 m long. The built-in “muting” function allows the automatic passage of parts to be machined, or loaded pallets, without interrupting the transportation movement. When the system is switched on by the start command (in series with the main circuit feedback loop) and the light protection is not interrupted, the main circuit is closed by the two safety relays of the XPSCM module. An interruption of the protective feld causes the safety outputs to open instantaneously, and the process PLC receives a stop command. The LED on the XPSCM front panel changes from green to red. The “open” state is maintained until the module is restarted using the start button. The “muting” function allows the light curtain protection to be inhibited. This can be used to authorise the passage of a materials trolley through the light curtain without tripping the main circuit. The “muting” function cannot be activated by supplying the inhibition sensors unless the safety outputs have been switched on beforehand. To trigger the “muting” function, the inhibition devices must be activated within the 3 second time interval. This synchronisation time for the two inhibition inputs can be deactivated by connecting two confguration terminals. The “muting” cycle has a maximum duration of 60 seconds. During this period, materials can be transported through the protection feld without deactivating the safety outputs. The 60 second limit value of the “muting” cycle may be made infnite by connecting two confguration terminals. During the “muting” process, a light indicating the “muting” status is controlled by the XPSCM module. An fault at indicator light level (short-circuit, open circuit) will be immediately recognised and deactivate the “muting” function. The indicator light comes on when a “muting” signal is generated and indicates the inhibition of the protection function.

Conditions to be observed for the “muting” function

b The “muting” sensors must either be: v Thru-beam type, sensing distance 8 m: XU2S18PP340L5 (or XU2S18PP340D). v Thru-beam type, sensing distance 15 m: XUB2BKSNL2T (or XUB2BKSNM12T) + XUB2BPANL2R (or XUB2BPANM12R). v Polarised reflex type, sensing distance 2 m: XUB9BPNAL2 (or XUB9BPNAM12) + XUZC50. v Polarised reflex type, sensing distance 5 m: XUM9APCNL2 (or XUM9APCNM8) or XUM9BPANL2 + XUZC50. v Limit switches. b dM y m to obtain continuous validation of the “muting” function. b Avoid the intrusion of persons during the “muting” phase. This phase is indicated by the indicator light connected to the “muting” indicator output of the XPSCM module. b A materials trolley must provide the “muting” signal before entering the protection feld and cease it once it has cleared all the sensors of the protection feld on exiting.

References

Description	Type of terminal block connection	Number of safety circuits	Additional outputs	Supply	Reference	Weight kg/ lb
Safety modules for monitoring single-beam photo-electric sensors, with a built-in “muting” function	Integrated in module	2	4	24 V c	XPSCM1144	0.350/ 0.772
Removable from module	2	4	24 V c	XPSCM1144P	0.350/ 0.772

Operating principle,
references
Monitor and Processing
Preventa safety modules and single-beam
photo-electric sensors
With a test input associated with a built-in “muting” function
D1, D2, D3, D4: monitoring photo-electric sensors.
MA1, MB1, MA2, MB2: “muting” photo-electric sensors.
m = trolley length (including material)
dM = distance between MA1, MB1 and MA2, MB2.

m MA1 MB1 Entry direction Materials trolley	D4 D2 D3 D1 MA2MB2 Materials trolley
dM

“Muting”
indication
Hazardous
zone
XPSCM1144p
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10
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Operating principle

XPSLCM safety modules are used with type 4 light curtains conforming to EN/ IEC 61496-1 to provide a system inhibiting the light curtain protection, i.e. “muting”. This function enables the automatic passage of parts for machining or loaded pallets, without interrupting the transportation movement within the zone protected by the electro-sensitive protection equipment (ESPE) system. In addition to the electro-sensitive protection and XPSLCM safety modules, the system comprises 4 to 8 inhibition sensors, 2 indicator lights and a key switch to reset the system to the initial state in the event of a sequence error. When the system is switched on by the start command and the light curtain protection not interrupted, the main circuit is closed by the safety outputs of the XPSLCM modules (solid-state safety outputs). In addition to safety outputs, the modules incorporate signalling outputs for sending system status information to the PLC. Either 5 or 14 LEDs and a 2-digit display, mounted on the front face of the module, provide information on the safety circuit status. An interruption of the protection feld monitored by the electro-sensitive protection equipment causes instantaneous opening of the safety outputs; the process PLC receives a stop command and the LED display mounted on the front face indicates the change of state of the safety circuits. The “open” state is maintained until the module is restarted using the Start button. The “muting” function cannot be activated by supplying the inhibition sensors unless the safety outputs have been switched on beforehand. To trigger the “muting” function, the inhibition devices must be activated within the 3 second time interval. During the activated “muting” phase, materials can be transported through the protection feld without deactivating the safety outputs. In the event of intrusion into the hazardous zone, a person cannot activate the inhibition sensors in the same way and the system stops. Whilst the “muting” function is activated, a “muting” status indicator light is controlled by the XPSLCM module. A fault at indicator light level (short-circuit, open circuit) is immediately recognised and deactivates the “muting” function. The indicator light only illuminates when a “muting” signal is generated and indicates the inhibition of the protection function.

Conditions to be observed for the “muting” function

b The “muting” sensors must either be: v Thru-beam type, sensing distance 15 m: XUM2APCNL2 (or XUM2APCNM8) or XUM2BPANL2 or XUM2BPBNL2. v Polarised reflex type, sensing distance 5 m: XUM9APCNL2 (or XUM9APCNM8) or XUM9BPANL2 or XUM9BPBNL2 + XUZC50. v Polarised reflex type, sensing distance 11 m: XUX9APANT16 (or XUX9APANM12) or XUX9APBNT16 (or XUX9APBNM12) + XUZC50. v Limit switches b dM y m to obtain continuous validation of the “muting” function. b Avoid the intrusion of persons during the “muting” phase. This phase is indicated by the indicator light connected to the “muting” indicator output of the XPSLCM module. b A materials trolley must provide the “muting” signal before entering the protection feld and cease it once it has cleared all the sensors of the protection feld on exiting.

References
Description	Type of terminal block connection	Number of safety circuits	Auxiliary outputs	Supply	Reference	Weight kg/ lb
Safety module for “muting” function	Removable from module	2 PNP	1 PNP + 1 NPN	24 V c	XPSLCM1150	0.660/ 1.455

Operating principle,
references
Monitor and Processing
Safety monitoring module
Preventa XPSLCM
for the “muting” function of type 2 and type 4 safety
light curtains

m A B C D Entry direction zone Materials trolley ESPE (Light curtain)

dM

“Muting” indication
Hazardous
Materials
trolley
ESPE: electro-sensitive protection equipment (light curtain).
A, B, D, C: “muting” sensors.
m: trolley length and dM = distance between A, B and D, C.
XPSLCM1150
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Operating principle,
references
Monitor and Processing
Preventa safety modules types XPSECME,
XPSECPE
For extending the number of safety contacts

Operating principle

Safety modules XPSECME and XPSECPE, for extending the number of safety contacts, are available as additions to Preventa XPSbase modules (Emergency stop, limit switch, two-hand control, etc.). They are used to extend the number of safety output contacts of the base modules.

References
Description	Connection	Number of safety circuits	Additional outputs	Supply	Reference	Weight kg/ lb
Safety modules for extending the number of safety contacts, for use with XPSbase modules	Captive screw clamp terminals Terminal block removable from module	4	2	a and c 24 V	XPSECME5131P	0.270/ 0.595
Spring terminals Terminal block removable from module	4	2	a and c 24 V	XPSECME5131C	0.270/ 0.595
Captive screw clamp terminals Terminal block removable from module	8	1	a and c 24 V	XPSECPE5131P	0.550/ 1,213
Spring terminals Terminal block removable from module	8	1	a and c 24 V	XPSECPE5131C	0.650/ 1.433
Captive screw clamp terminals Terminal block removable from module	8	1	a 115…230 V	XPSECPE3910P	0.650/ 1.433
Spring terminals Terminal block removable from module	8	1	a 115…230 V	XPSECPE3910C	0.650/ 1.433

XPSECME5131P
XPSECPE5131C
XPSECPE5131P
XPSECME5131C
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Operating principle,
references
Monitor and Processing
Preventa safety modules types XPSTSA,
XPSTSW
For safety time delays

Operating principle

Safety modules XPSTSA and XPSTSW are used in applications requiring safety time delays: b modules XPSTSA in applications with interlocking on high inertia machines with long rundown time (guards unlocked after safety time delay has elapsed), b modules XPSTSW in applications with a safety switchover contact (shunting contact in association with XPSVN modules for zero speed detection, solenoid valve monitoring, etc.). The time delay of safety circuits can be set to 16 preset values, using 2 selectors located on the front face of the modules. To aid diagnostics, the modules have LEDs which provide information on the monitoring circuit status and 2 solid-state outputs for signalling to the process PLC. In addition, their removable terminal blocks optimise machine maintenance.

References
Description	Connection	Number of safety circuits	Additional outputs / Solid-state outputs to PLC	Supply	Reference	Weight kg/ lb
Safety modules for applications with interlocking on high inertia machines	Captive screw clamp terminals Terminal block removable from module	1 delayed	2 NC / 2	a and c 24 V	XPSTSA5142P	0.250/ 0.551
a 115 V	XPSTSA3442P	0.360/ 0.774
a 230 V	XPSTSA3742P	0.360/ 0.774
Safety modules for applications with safety switchover contact	Captive screw clamp terminals Terminal block removable from module	1 pulse type	2 NC / 2	a and c 24 V	XPSTSW5142P	0.250/ 0.551
a 115 V	XPSTSW3442P	0.360/ 0.774
a 230 V	XPSTSW3742P	0.360/ 0.774

XPSTSAppppP
XPSTSWppppP
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Operating principle,
references
Monitor and Processing
Preventa safety modules types XPSDMB,
XPSDME
For coded magnetic switch monitoring

Operating principle

Safety modules XPSDMB and XPSDME are specifcally designed for monitoring coded magnetic safety switches. They incorporate two safety outputs and two solid-state outputs for signalling to the process PLC. Conforming to Performance Level PL e/Category 4 conforming to EN/ISO 13849-1, modules XPSDMB can monitor two independent sensors and modules XPSDME can monitor up to six independent sensors. To monitor a higher number of magnetic switches using these safety modules, the magnetic switches can be connected in series parallel, while meeting the requirements of Performance Level PL d/Category 3 conforming to standard EN/ISO 13849-1. Safety modules XPSDMpppppP incorporate removable terminal blocks, thus optimising machine maintenance. To aid diagnostics, the modules have LEDs on the front face which provide information on the monitoring circuit status.

References
Description	Connection	Number of safety circuits	Synchro time between inputs	Solid state outputs for PLC	Supply	Reference	Weight kg/ lb
Safety module for monitoring 2 coded magnetic switches	Captive screw clamp terminals Terminal block integrated in module	2 NO	< 0.5 s	2	c 24 V	XPSDMB1132	0.250/ 0.551
Safety module for monitoring 6 coded magnetic switches	Captive screw clamp terminals Terminal block integrated in module	2 NO	< 0.5 s	2	c 24 V	XPSDME1132	0.300/ 0.661
Safety module for monitoring 2 coded magnetic switches	Captive screw clamp terminals Terminal block removable from module	2 NO	< 0.5 s	2	c 24 V	XPSDMB1132P	0.250/ 0.551
Safety module for monitoring 6 coded magnetic switches	Captive screw clamp terminals Terminal block removable from module	2 NO	< 0.5 s	2	c 24 V	XPSDME1132P	0.300/ 0.661
Safety module for monitoring 6 coded magnetic switches	Captive screw clamp terminals Terminal block integrated in module	2 NO	< 2.2 s	2	c 24 V	XPSDME1132TS220	0.300/ 0.661

XPSDMB1132
XPSDME1132
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Operating principle,
references
Monitor and Processing
Preventa safety modules type XPSVNE
For zero speed detection
XPSVNEppppp

Operating principle

Preventa safety modules XPSVNE for zero speed detection are used to detect the stop condition of electric motors. Their most common applications include: providing the unlock signal for electrically interlocked sliding or removable machine guards, controlling rotation direction signals for reversing motors and engaging locking brakes after a motor has come to a standstill. As electric motors run down, a remanent voltage is produced in the windings of the motor due to residual magnetism. This voltage is proportional to the speed of the motor and, therefore, decreases as the motor comes to a standstill. This remanent voltage is measured in a redundant manner so as to detect the stop condition of the motor. The cabling between the motor windings and the inputs of the XPSVNE module is also monitored to prevent a cabling breakage or fault being seen as a stopped motor. A transformer should not be used to connect the motor to terminals Z1, Z2 and Z3 since there is no monitoring of the connection with the motor winding via the resistance monitoring. Modules XPSVNE are suitable for detecting the stop condition of all types of AC or DC motor driven machines which, when the motor runs down, produce a remanent voltage in the windings due to residual magnetism. These machines can be controlled by electronic devices, such as variable speed drives or DC injection brakes. The input flters for standard XPSVNE modules are designed for a frequency of up to 60 Hz. For motors operating at a frequency higher than 60 Hz, which therefore produce a high frequency remanent voltage, special modules XPSVNEppppHS should be used. Modules XPSVNE have 2 potentiometers mounted on the front face of the module which allow independent adjustment of the switching threshold for each input circuit. This allows adjustment for different types of motors and application requirements. To aid diagnostics, modules XPSVNE have 4 LEDs and 2 solid-state outputs to provide information on the status of the zero speed detection circuit.

References
Description	Connection	Number of safety circuits/ Solid-state outputs for PLC	Supply	Frequency of motor power supply	Reference	Weight kg/ lb
Safety modules for zero speed detection	Captive screw clamp terminals Terminal block removable from module	2/ 2	c 24 V	y 60 Hz	XPSVNE1142P	0.500/ 1.102
> 60 Hz	XPSVNE1142HSP	0.500/ 1.102
a 115 V	y 60 Hz	XPSVNE3442P	0.600/ 1.333
> 60 Hz	XPSVNE3442HSP	0.600/ 1.323
a 230 V	y 60 Hz	XPSVNE3742P	0.600/ 1.323
> 60 Hz	XPSVNE3742HSP	0.600/ 1.323

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Operating principle,
references
Monitor and Processing
Preventa safety module type XPSEDA
For lift control

Operating principle

When the cabin is parked at a landing, with the doors open, some lifts automatically correct their level (isolevelling) in relation to the landing in order to compensate for any differences generated by modifcation of the load in the cabin. During this operation, European standard EN/IEC 81 recommends that the presence of the cabin be checked within a zone of +/- 0.2 m around the landing (door unlocking zone), by means of a safety circuit which will cause the cabin to stop if it moves out of the specifed zone. The use of the safety module XPSEDA, which checks the presence of the cabin in the specifed zone at two points, meets this requirement. The module incorporates two safety outputs and two solid-state outputs for signalling functions. Four LEDs on the front face of the module provide visual indication of the status of the safety circuit. The position of the cabin in relation to the landing is detected by two limit switches in the lift shaft. It is also possible to use non-contact sensors (magnetic sensors with reed contact). When the cabin reaches the preset position and when it is within the permissible tolerances in relation to the landing, the two safety circuits in safety module XPSEDA close and allow isolevelling of the cabin with the doors open. Any change in one of the input signals (cabin outside the specifed zone) or detection of a fault (break in the wiring, short-circuit, etc.) causes immediate opening of the safety outputs in the XPSEDA module and subsequent stopping of the cabin.

References
Description	Connection	Number of safety circuits	Solid-state outputs for PLC	Supply	Reference	Weight kg/ lb
Safety module for lift control	Captive screw clamp terminals Terminal block integrated in module	2	2	a and c 24 V	XPSEDA5142	0.180/ 0.397

Cabin Cabin doors

Landing doors
Landing
Landing indicator
(stop reference point)
Door unlocking
zone
XPSEDA5142
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XPSPVT1180
Operating principle Monitor and Processing
Preventa safety module type XPSPVT
For dynamic monitoring of hydraulic valves on
linear presses

Operating principle

Safety module XPSPVT is specifcally designed for monitoring hydraulic safety
system valves which control the movements of potentially dangerous machines.
The operating principle of this module is explained in the circuit diagram
of a hydraulic safety system for linear presses (see below).
This hydraulic safety system features a 3 position piston which controls the up and
down stroke of the operating cylinder. The circuit is equipped with a safety valve
to complete the redundant system. This circuit must be activated to enable the
up and down stroke of the cylinder.
If either of the 2 pistons becomes defective (for example, due to a broken spring
or to oil contamination), and the valve piston shifts from its normal position towards
the open position, the XPSPVT module will detect it and prevent resumption of the
piston stroke.
Proximity sensors integrated in the valve to detect the piston positions and
connected to the XPSPVT module must be damped when the valve coils are in the
de-energised state (zero position).
The sensor circuits of the XPSPVT module are designed to allow connection of NPN
and PNP proximity sensors or sensing components. Either 2-wire or 3-wire types
can be used.
Hydraulic safety system circuit operating on a linear press.
Monitoring of valves in position 0.
(1) 3 position hydraulic valve.
(2) 2 position hydraulic valve.
S3
A B
(2) P Y3
(1)
S2
Y2
S1
Y1
A B
P T
Pressure
release valve
Opening
Pressure
release
Pump valve
Closing +
opening
Closing

Reference

Description	Display	Supply	Reference	Weight kg/ lb
Safety module for dynamic monitoring of hydraulic valves on linear presses	8 LEDs	24 V c	XPSPVT1180	0.540/ 1.190

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10
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Operating principle

Safety module XPSPVK is specially designed for dynamic monitoring of the safety valves in eccentric presses, conforming to European standard EN 692. This standard establishes the specifcations related to safety control systems for presses equipped with friction clutches. To meet the requirements of this standard, the clutch/brake control must be monitored dynamically. This function is provided by a double-bodied solenoid valve (safety valve for presses) which performs the functions of two valves mounted in one body. The position of the two valve pistons can be monitored by proximity sensors, mechanical limit switches or pressure switches. Module XPSPVK checks for the correct operation of the double-bodied safety valves at 3 points in the cycle. b Start at top dead centre: checks the rest position of the two valves. b Take-on point (transfer function): checks that the two valves are in the “activated” (energised) position. b Press stop trigger point: checks that the two valves return to the rest position. Return must be simultaneous for both valves within a defned time period. To set up an automatic disconnect of the XPSPVK module at the frst machine stroke, a NC auxiliary contact mounted on the main control contactor or on another contactor/ relay, activated at the same time, can be wired to terminals 7 and 8 in parallel with the RESET button. If a fault is detected during the cycle, the XPSPVK module will stop the slide stroke and will also inhibit the start of another cycle.

Operating principle,
references
Monitor and Processing
Preventa safety modules type XPSPVK
For dynamic monitoring of double-bodied solenoid
valves
XPSPVK

References

Description	Display	Supply	Reference	Weight kg/ lb
Safety modules for dynamic monitoring of double-bodied solenoid valves	8 LEDs	24 V c	XPSPVK1184	0.700/ 1.543
115 V a	XPSPVK3484	0.900/ 1.984
230 V a	XPSPVK3784	0.900/ 1.984

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10
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Operating principle Monitor and Processing
Preventa safety modules type XPSOT
For safety stop with automatic overtravel monitoring
and control

Operating principle

Safety module XPSOT is used on eccentric presses to monitor overtravel and ensure that the press slide stops in a non-dangerous position, i.e. top dead centre (TDC), during normal (non-emergency) operation. Use of this module, designed in accordance with standard EN 692 relating to mechanical press safety, makes it possible to create a redundant, self-monitoring control system. The two essential functions of this safety module are to: b Trigger the end of cycle stop sequences slightly before top dead centre (at point A) so as to come to a complete stop at TDC. After TDC, the permissible overtravel is approximately 10°. The safety module immediately detects any overtravel. Overtravel is indicative of braking device deterioration and, in this case, jog mode must be used to move the slide back to TDC. The next cycle will be inhibited to allow maintenance to be performed on the braking device (cam 1). b Take over control monitoring during the dangerous part of the cycle (slide downstroke). Any stop instruction issued between TDC (0°) and point C (approximately 150° after TDC) causes an immediate stop of the press. This approximate value of 150° corresponds to the 8 mm tool closure dimension (safety point). When a stop instruction is issued after this safety point, the press completes the cycle and comes to a complete stop at TDC (cam 2). Control of the dangerous part of the cycle (generally the slide downstroke) is usually activated from a two-hand control station associated with a safety module (type XPSBCE). Overtravel monitoring is performed on each cycle by safety module XPSOT.

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