Download Next Generation Guardmaster Safety Relay

Next Generation Guardmaster Safety Relay (GSR)
Stop Motion with Guard Locking and E-stop
Circuit Components
• Bulletin 440G-LZ guard locking switch
• Bulletin 872C proximity sensors
• GLP safety relay
Circuit Status
The gate is closed and locked. The GLP safety relay outputs X14 and X24 are OFF. The PowerFlex 525 drive is disabled,
and the motor is OFF. The GLP safety relay is ready for reset. The GLP safety relay has a Logic setting of 5 (Stop Motion
with 1...10 seconds Unlock Delay), a Frequency Measuring Time (SLS1) setting of 1 (1 Hz, 5.05 seconds) and a 
SLS2/Time setting of 3 (40% of the Delay).
TIP
Start the GLP configuration from “0” when using Logic settings 5
The TLS-ZR guard locking interlock can replace the 440G-LZ guard locking switch, using the same wiring connections.
Operating Principle
When the proximity sensors detect speed below 1 Hz (the SLS1 setting), the GLP safety relay starts the timer set by SLS1.
When the 5.05 seconds expire, the GLP safety relay turns on Y32, X14, X24, and L11 (which are not used in this example)
and starts the unlock timer. The unlock timer is 4 seconds (40% of 10 seconds), which is determined by the Logic switch
setting and the SLS2/Time setting. After 4 seconds, the GLP safety relay unlocks the 440G-LZ guard locking switch.
Fault Detection
Upon power-up, the 440G-LZ guard locking switch and GLP safety relay perform internal checks. The 440G switch
checks its OSSD outputs for faults. The GLP safety relay uses redundant proximity sensors that must be mounted on
independent fixtures.
Ratings
The safety function meets the safety performance requirements of SIL CL2 per IEC 62061:2005 and has a Category 3
structure that can be used in systems that require Performance Levels up to PLd per ISO13849-1:2006.
88
Rockwell Automation Publication SAFETY-WD001F-EN-P - November 2015