Stop Motion Monitors CU2

Overview

The Guardmaster® CU2 control unit is a compact timing and stop-motion detector interface module. Two independent inductive proximity inputs monitor the movement of two metal parts of the machine (for example, sprockets, cams or linkages). The unit detects when hazardous motion has ceased then sends a signal to unlock guard-locking devices. This unit integrates guard-locking interlock switches on machines that have variable or unpredictable run down cycles.

A removable cover allows access to the DIP switches and potentiometer which control the timing. The on-delay may be adjusted between 0.1 seconds to 40 minutes, through a series of 4 broad time ranges. The final adjustment is made by a potentiometer.

The Y1/Y2 terminals provide a check of contactors at machine power up. This is only relevant to certain special applications. For normal use these terminals should be linked. After all motion has ceased, the N.O. safety on contacts close, which may be used to energize electrically operated solenoid locking guard switches. In addition the N.C. contacts open to indicate the unit’s status.

LED indication in the unit displays power, timer on, and outputs.

Note: that Guardmaster Safety Relays have been marketed by Rockwell Automation under the trade name "Minotaur" in the past.

Specs

1. Category 1 per EN 954-1
2. Stop category 1
3. NPN and PNP inputs
4. Timed off-delay 0.1 s...40 min
5. Two N.O. safety outputs
6. One N.C. auxiliary output