Allen-Bradley Guardmaster, User Manual

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Rockwell Automation Publication 440R-UM013E-EN-P - March 2017 25
Power, Ground, and Wire Chapter 3
Figure 13 - Safedge Operating Principle
Figure 14 shows the typical wire connections. With the proper connection,
GSR relays detect the compression of the edge and turn off their outputs. With
no pressure on the edge, the GSR outputs can be turned back on with a reset
signal.
Figure 14 - Example Connections to Safety Edges
Safety Outputs
GSR relays have two types of outputs:
• Electromechanical (CI, DI, EM, EMD, and SI safety relays)
• OSSD (DIS safety relay)
To extend the operating life of the safety relays surge suppression is required.
IMPORTANT
For fault detection purposes, GSR relays must be configured for monitored
manual reset when connected to Safedge safety edges.
IMPORTANT When using safety edges, the DI and DIS safety relays must be set for AND
logic. If only one edge is used, the second input must either be connected
with jumpers or to another safety device. If another safety device is
connected to the second input, the outputs of the safety device must be ON
during configuration and during powerup.
Conductive
Rubber
Non-conductive Rubber
Flexible Wire Cores
Wires on
both ends
(Ch1 and Ch2)
Compression creates
a low resistance
from Ch1 to Ch2
DI and DIS
Pulse
Testing
Outputs
S11 S21
Edge 1 Edge 1 Edge 1 Edge 2
S22
Input 2 Input 1
S12 S42 S32
CI and SI
Pulse
Testing
Outputs
S11 S21 S22
Input 1
S12
DI and DIS
Pulse
Testing
Outputs
S11 S21 S22
Input 2 Input 1
S12 S42 S32
EM Device