Dg Safety Relay; Safety Device Inputs; Single Wire Safety (Sws) Input; Output Monitoring - Allen-Bradley Guardmaster GuardLink User Manual

DG Safety Relay

The DG safety relay is the host of the GuardLink system. By using a sequence
of push buttons on the front face, the DG safety relay can be configured for
many types of safety applications. The DG safety relay can do the following:
• Monitor up to two GuardLink circuits, two safety devices or a
combination
• Use Single Wire Safety (SWS) input and output for expansion
• Execute Stop Categories 0 or 1 (immediate and delayed outputs)
• Monitor the status of output safety devices, like contactors
• Be configured for automatic or monitored manual reset
• Be configured to initiate a lock function for guard locking with a
GuardLink circuit
• Be configured to initiate an unlock function for guard locking with a
GuardLink circuit

Safety Device Inputs

The DG safety device inputs can be configured in one of the following
arrangements:
• One GuardLink circuit
• Two GuardLink circuits
• One GuardLink circuit and one safety device
• Two safety devices
• One safety device
The DG safety relay applies AND logic to all used inputs. Unused inputs are
ignored.

Single Wire Safety (SWS) Input

The DG safety relay then applies AND logic to the SWS input if configured
for use. The single wire safety input is ignored if not included in the
configuration.

Output Monitoring

The DG safety relay monitors the status of external safety output devices. After
all safety inputs are satisfied, the DG safety relay checks the monitoring input
terminal. If 24V is present, the DG safety relay proceeds to execute the reset
function.
Rockwell Automation Publication 440R-UM015C-EN-P - April 2018
Overview Chapter 1
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