Rockwell Automation Allen-Bradley Guardmaster 440R-S35011, User Manual

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20 Rockwell Automation Publication 440R-UM014D-EN-P - December 2019
Chapter 3 Power, Ground, and Wire
Fault Reset Input
The X2/X3 connection can reset some external faults. The reset can occur
automatically or manually. The MSR55P safety relay is shipped from the
factory with a jumper from X2 and X3 for automatic reset. A voltage-free
contact can be used to reset a fault condition manually.
If control of terminal X3 must be by a push button or by a PLC via an
interposing relay, the push button or relay must have the necessary insulation
between the motor voltage and PLC potential. Figure 13 shows two typical
connections to the fault reset input.
Figure 13 - Fault Reset Circuit Examples
ATTENTION: Terminals X1-X2-X3 have electrical connections to measuring
inputs L1-L2-L3. Voltage-free contacts that are rated for L1-L2-L3 voltage
must be used for these connections.
A2
X1 X2
L3 L2 L1
X3
34 44
A1 A3 33 23 11
24 12 ON ERR A4 54
43 53
Automatic Fault Reset
A2
X1 X2
L3 L2 L1
X3
34 44
A1 A3 33 23 11
24 12 ON ERR A4 54
43 53
Manual Fault Reset