Electro Cam PL-1746 Series - Manual (Page 110)

7-5 Troubleshooting
PS-4108 Rack Troubleshooting
Problem Possible Solutions
1. Verify that the LED on the solid state relay lights at the correct times.
2 . Verify that the channel's status, as viewed on the PS-6400 Keypad/Display's I/O status
screen, operates correctly.
3. Verify that the setpoint programming in the PL-1746 is correct.
4. Check for other programming such as timed outputs, group and mode logic, and enable
windows (9x channels) in the PL-1746 that can inhibit outputs.
5 . See if installing a 10k, 5W resistor in parallel with the external device's input corrects the
problem.
6. Replace the solid state relay with a known good relay.
7. Contact the factory.
1. Verify that the LED on the solid state relay lights at the correct times.
2. Verify that the channel's status, as viewed on the PS-6400 keypad's I/O status
screen, operates correctly.
3. Verify that the setpoint programming in the PL-1746 is correct.
4. Check for other programming such as timed outputs, group and mode logic, and enable
windows (9x channels) in the PL-1746 that can inhibit outputs.
5. Verify correct wiring from the output to the load. Polarity must be observed when wiring
DC outputs.
6. Replace the solid state relay with a known good relay.
7. Contact the factory. A digital DC
output stays on
continuously
An input to an
external device that
is driven by a digital
AC output stays
on continuously