Allen-Bradley Guardmaster - Page 30

30 Rockwell Automation Publication 440R-UM013E-EN-P - March 2017
Chapter 3 Power, Ground, and Wire
Figure 20 - Typical Reset/Monitoring Circuits
Circuit Description
1 In automatic/manual reset, a direct connection can be made to 24V DC.
2 Output devices are monitored with their normally closed contacts. This circuit can only be used in
automatic/manual reset.
3 A normally open push button is used. The relay can be configured for automatic/manual reset or
monitored manual reset.
4 Output devices are monitored along with a normally open push button. The relay can be configured for
automatic/manual reset or monitored manual reset.
5 An EM or EMD expansion relay is used to supply the voltage to terminal S34. This circuit can also contain
feedback contacts and a reset push button, similar to circuits 2
, 3, and 4.
6 A PLC is used to generate the reset signal. The GSR relay can be configured for either automatic/manual
or monitored manual reset.
+24V DC
24V DC Com
S34
A1
A2
Circuit
1
Circuit
2
Circuit
3
Circuit
4
Circuit
5
Circuit
6
S34
A1
A2
S34
A1
A2
S34
A1
A2
+
1
2
3
PLC
S34
A1
A2
S34
A1
A2
EM or
EMD
A1
A2