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PRSU Series, Operating Instructions Manual (Revision 1.0) 

2.  Manual: 

In this operating mode, the output relay coils will de-energize upon  
the closure of conductors within the monitored sensor/switch system.  
The coils will not energize again until the 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 

of the following conditions are met: 

 

The contacts have opened in the monitored sensor/switch. 

The machine primary control elements (MPCE 1 and MPCE 2)  
have closed.

 

 

A manual RESET signal is subsequently generated by an  
operator 

pressing the “Start” pushbutton. 

 

 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 

Figure 6: RESET Mode (Manual) Configuration 

Figure 7: RESET Mode (Conditional) Configuration 

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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