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Rockwell Automation Publication 442G-DM001A-EN-P - September 2015

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Multifunctional Access Box and Guard Locking with Time Delay Safety Relay

Note: 

If the PWR/Fault status indicator on the relay blinks red, push the blue 

button on the access box to reset the relay.

Note: 

If the DIA status indicator on the access box is red, clear the fault by 

pressing the green power reset button (found next to the circuit breaker) for at 

least three seconds. 

3.

To request access to the hazardous area, press the yellow push button.

The GLT relay immediately turns its outputs OFF to shut down the 

hazard and after three seconds, unlocks the guard door. The yellow 

push button on the access box turns OFF.

4.

Open the guard door. 

The blue push button on the access box turns OFF.

Note: 

The yellow push button is illuminated when the door is “closed and 

locked (diagnostic signal OL is on).” The blue push button is illuminated when 

the door is “closed and the bolt actuator is inserted in the lock module” (and 

therefore, ready to be locked (diagnostic signal OT is on)). See Diagnostics for 

more information about the access box diagnostic signals.

5.

Close the guard door. 

The blue push button does not turn on again until you rotate the 

handle to insert the bolt into the lock module.

6.

To reset the safety system, press the blue push button. 

The yellow push button turns on again, which indicates the device is 

closed and locked.

E-stop

The GLT relay can be operated with other safety relays in the Guardmaster 

Safety Relay (GSR) family, by use of the single-wire safety (SWS) connection. 

When the GLT relay receives a single-wire safety signal from another GSR 

relay, the GLT relay issues an Unlock command.

In this demo, the E-stop of the access box is connected to the GSR single input 

(SI) safety relay. The single-wire safety (SWS) output of the SI is connected to 

the SWS input of the GLT relay. When the E-stop is pressed, the GLT relay 

immediately turns its outputs OFF to shut down the hazard and after three 

seconds, unlocks the guard door. 

7.

With the door closed and locked and the outputs ON, press the E-stop.

This action turns the outputs of the SI OFF. The single wire safety of 

the SI turns OFF, which turns the outputs of the GLT relay off. The 

GLT relay cannot be reset until the E-stop is released.

8.

Release the E-stop. To reset the GLT relay, press the blue push button.

IMPORTANT

The guard door must be in the open position to clear a latching fault. 

Summary of Contents for Guardmaster 442G-MABR-URM-C03

Page 1: ...Lock Request You press the Unlock Request button to request access to the safeguarded area The control system GLT relay shuts down the hazard and unlocks the guard door after a time delay Then you ar...

Page 2: ...800F Blue Push Button Reset GLT relay Relay Logic 2 Range 3 Time 6 SI Relay Automatic Manual Reset AM E stop Front View Rear View Escape Release A2 S12 S22 24 51 L61 B2 L12 L11 14 A1 S11 440R GL2S2T...

Page 3: ...gnals 5 Close the guard door The blue push button does not turn on again until you rotate the handle to insert the bolt into the lock module 6 To reset the safety system press the blue push button The...

Page 4: ...efault factory setting the system enters into a latchingfaultwhen the escape releaseis actuated If theescapereleaseis actuatedtooslowly the system will not enter into a latching fault 10 To reset the...

Page 5: ...to the circuit breaker to the power supply Note You can reconfigure the access box DIP switches to deactivate Release Monitoring refer to Chapter 4 Change Device Configuration use of DIP switches in 4...

Page 6: ...sms automatically extends when the handle is in the OPEN position The other mechanism is manually extended see Figure 1 To pivot out press the grooved part only possible with the handle in the OPEN po...

Page 7: ...Rockwell Automation Publication 442G DM001A EN P September 2015 7 Multifunctional Access Box and Guard Locking with Time Delay Safety Relay Notes...

Page 8: ...n com rockwellautomation about us sustainability ethics product environmental compliance page Allen Bradley and Guardmaster are trademarks of Rockwell Automation Inc Trademarks not belonging to Rockwe...

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