WIRING INSTRUCTIONS
Figure 1. Terminal numbering scheme
General
The system requires 24V AC @ 500mA supply voltage. Since the outputs use the same power
source, installer ought to select a proper supply power rate by taking the relay/contactor coil
total current requirements into account. For a typical cube relays/contactor combination,
minimum power rate of 50VA transformer recommended. Using 18 gauge cable, connect the
supply voltage to terminals 1 and 2.
When powering up, make sure that the both modules (controller and relay interface module)
are connected via the data cord (cat#CAB485). Otherwise the interface module will not operate.
Pressure switch
If there is not efficient pressure, the system detects and power off the pump when the pre-
programmed delay timer expires.
If no pressure switch is being used, set the delay time to ‘0’. This will disable the pressure
feedback. If the pressure switch is being used, a connection must be made from pressure switch
to the terminals 3 and 4 by using 18 gauge cable.
Relay, Contactor and/or Solenoids
The outputs require 24V AC rated relays, contactors or solenoids. The outputs all together are
internally hardwired to a resettable fuse rated at ~1500mA. Using 18 gauge cable;
- Connect pump relay coil to terminal 6,
- Intake coil to terminal 7,
- Drain coil to terminal 8,
- Connect opposite ends of the relay/contactor coils to terminal 5 (common).
Caution
The triac outputs should NOT be grounded and each output should NOT exceed 500mA.
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