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TUMBLER FORWARD PENDANT --- PB1
This push button comprises of one (1) normally open switch, and is mechanically interlock with Tumbler
Reverse Push Button.
EMERGENCY STOP (E-Stop) PENDANT --- PB6
This push button switch is normally an open device and its function is to shut down the control voltage to
the dryer in the event it is pressed.
NOTE: It WILL NOT effect the sprinkler circuit power.
2.0 Verify Pendant Electrical Signals
ALL the pendant control signals are interfaced to the Main Electrical Panels PLC (Programmable Logic
Controller) except for EMERGENCY STOP (E-Stop).
LOAD - Level - UNLOAD Switch --------- A and B
Tumbler Reverse Switch----------------------- PB2
Tumbler Forward Switch ---------------------- PB1
EMERGENCY STOP (E-Stop) Switch -- PB6
For a quick check of the wiring of SEL 1 and 2 to the PLC (Programmable Logic Controller) perform the
following test with the control voltage ON (green button).
Turn the selector switch to LOAD
Does PLC (Programmable Logic Controller) input L.E.D. #15 light?
Turn the selector switch to UNLOAD
Does PLC (Programmable Logic Controller) input #16 light?
Turn the selector switch to LEVEL
Are both PLC (Programmable Logic Controller) input #15 and input #16 OFF?
If the answers to these questions are YES, wiring to the PLC (Programmable Logic Controller)
is correct
If any answer to these questions is NO, refer to Probable Causes paragraph on page 69.
Tumbler Reverse Switch --- PB2
For a quick check of the wiring of PB2 to the PLC perform the following test with control voltage
ON (GREEN button).
Press the REVERSE Push-button.
Does PLC (Programmable Logic Controller) input L.E.D. (light emitting diode) #18 light?