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Copyright (2021) 

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 rights reserved. Changes, which serve technical improvements are reserved.

 

 

11 

PRSU Series, Operating Instructions Manual (Revision 1.0) 

 

 
Maintenance Info and Replacement Procedure 
 

 

 

 
 

The safety relay controller works without maintenance. 
For replacement of the device, follow the procedure below: 

 

1.  Turn OFF and disconnect the source of applied power to the device.  

Ensure that no terminal of the device is connected to a live voltage before continuing. 

 
2.  Unscrew terminals A1 and A2 from the device before removing any other connections. 
 
3.  One at a time, free connect

ions from the device’s terminal blocks by  

unscrewing. Ensure that freed conductors are not left in the vicinity of live voltage  
conductors.  

 

4.  Insulate wire ends if necessary. 
 
5.  When all connections are freed, remove the defective device from the DIN rail. 

 

6.  Mount new device to the DIN rail (see Page 8, Figure 4). 

 

7. 

Perform “Device Startup Verification” procedure described earlier on Page 6 of this 
manual. 

 

 

 

 

 

 

Summary of Contents for PRSU/2

Page 1: ...lants who are familiar with the safety instructions and safety regulations Skilled personnel who build install maintain and operate safety equipment in plants and machinery Symbol Key These operating...

Page 2: ...regulations for safety at work and accident prevention and who have read this manual s content in full Installation assembly and maintenance of electrical equipment is only permitted by specialized s...

Page 3: ...voltage of 24VDC or 24VAC This model features two normally open safety relays that are triggered by the Sensor Monitoring terminals S11 S12 S21 S22 Terminals Description A1 Power input 24VDC or 24VAC...

Page 4: ...relays that are triggered by the Sensor Monitoring terminals S11 S12 S21 S22 This model also features an additional normally closed auxiliary relay not for safety use Terminals Description A1 Power in...

Page 5: ...ty relays that are triggered by the Sensor Monitoring terminals S11 S12 S21 S22 This model also features an additional normally closed auxiliary relay not for safety use Terminals Description A1 Power...

Page 6: ...or more information After the RESET signal is received and the monitored switch is in the unactuated state the relay contacts 13 14 23 24 will close Device Startup Verification PRSU 4 PRSU 5 Before cr...

Page 7: ...application will require only a single PRSU 2 PRSU 4 or PRSU 5 the following rule of thumb guidelines can be used Recommended Application Limits Product Type Maximum Area Maximum Length ControlMat Arm...

Page 8: ...ch on the rear of the unit for DIN Rail attachment Electrical Connections Wire the device based on which of the following options best suits the target application RESET Mode Control Wiring 1 Automati...

Page 9: ...closure is broken and a RESET signal is manually generated by the operator via a mechanical N O pushbutton or switch 3 Conditional In this operating mode the RESET signal cannot propagate unless all o...

Page 10: ...nergize Warning For this configuration to work as intended the series resistance between each end of the sensor s conductors cannot exceed 10 Additionally the short circuit resistance between both of...

Page 11: ...no terminal of the device is connected to a live voltage before continuing 2 Unscrew terminals A1 and A2 from the device before removing any other connections 3 One at a time free connections from the...

Page 12: ...es In cases where either one or both Channel LEDs is OFF during normal operation please verify that the device is properly wired If the problem persists the device is no longer capable of service Reti...

Page 13: ...47 5 1 AC 15 3 A DC 13 3 A Max Switching Capacity 1500 VA resistive load Mechanical Lifetime 107 switching cycles Creeping Distance and Clearance EN 50178 at pollution grade 2 over voltage category 3...

Page 14: ...rical Lifetime 105 switching cycles DC 24V 2A 105 switching cycles DC 24V 2A Creeping Distance and Clearance EN 50178 at pollution grade 2 over voltage category 3 250V Basis isolation over voltage cat...

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