Safety
Interlock Switches
Guard Locking
CU1 Electronic Timer Relay
The CU1 is a compact timing unit, designed to energize and thus unlock guard locking devices. It has been developed to integrate with the Guardmaster Atlas, Spartan, or TLS-GD2, on machines which have a run down cycle or do not stop immediately. It may also be incorporated into other parts of the safety related controls system, should a predictable, on-delay be required.
A removable cover allows access to the DIP switches & potentiometer which control the timing. The on-delay may be adjusted from 0.1 second to 40 minutes, through a series of 4 broad time ranges, A (0.1-10 secs) B (1-39 secs) C (6 secs-5 mins) D (48 secs-40 mins). The final adjustment is made by the adjacent potentiometer.
The unit is initiated when power is applied. Timing begins provided the reset loop X1-X2 is made. This test loop monitors the opening of the contactors isolating power to the moving parts of the machinery. Thus the unit may only be energized and timing commenced once the E-Stop command has been given and confirmed.
After the preset delay, the N.O. safety contacts close, which may be used to energize electrically operated solenoid locking guard switches. In addition the N.C. contacts open to indicate the units status. LED indication in the unit displays power, timer on, and outputs, as appropriate. A remote indication unit is also available.
Features
- Timed delay output 0.1s to 40 min
- 2 N.O. safety outputs
- 1 N.C. auxiliary output