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What Is a GuardLink System?
Overview
A GuardLink system is a collection of components to simplify a series
connection of safety devices while achieving the highest industrial safety
rating. The system has these important features:
• Simplifies the connection of series connected safety devices.
• Facilitates the scalability of the safety series connections.
• Provides diagnostic information about each device in the system
without having to run a separate status wire back to the machine control
system.
• Allows the simultaneous or individual lock and unlock of guard locking
interlocks in the series connected system. No need for an additional wire
from the machine control system to lock and unlock the safety gate.
• Helps ease communication to the machine control system over
EtherNet/IP. Communication includes sending non-safety commands
to the devices and receiving status information back from the safety
devices.
Figure 1 on page 12
shows the basic components of a typical application. The
GuardLink tap has M12 quick disconnect terminations to facilitate wiring
with cordsets and patchcords. The DG safety relay can accommodate one or
two GuardLink circuits or a combination of GuardLink and individual safety
devices.
Each GuardLink circuit can accommodate up to 32 taps. The DG safety relay
operates and monitors two safety contactors and has a monitored manual reset.
A typical GuardLink system consists of the following:
• One DG (dual GuardLink) Guardmaster® safety relay (GSR)
• One GuardLink SmartTap for each safety device
• One terminator for each GuardLink circuit
• Patchcords and cordsets
• An optional Ethernet interface
Rockwell Automation Publication 440R-UM015C-EN-P - April 2018
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