The Production Cycle Timer
Owners Manual
1.4.5 Status Indicator Lamps
The PCT has several indicator lamps that are quite helpful for debugging wiring problems.
To debug power wiring, apply 120VAC power to the PCT and then make sure the PWR indicator is illuminated. If
it does not, then the 120VAC power wiring is probably incorrect.
To debug logic input wiring, activate the switch or sensor while observing the LED2 and LED3 indicator lamps.
The indicator corresponding to the activated input should illuminate. If it does not, try activating the input with a
few inches of wire. When you connect the input screw terminal to the ground screw terminal, the input should
activate, and the indicator lamp should illuminate.
To debug serial communications wiring, observe the ENB, TXD, and RXD lamps while attempting to communicate
with the PCT. The RXD lamp should illuminate if the PCT is receiving commands. The TXD lamp should
illuminate when the PCT is responding.
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Logic Input Status
Indicator Lamps
Serial Port / Power
Status Indicator Lamps
