User Guide

Installation
9
UPC20+ Universal Power Controller
Installation
P1 Terminal Connections
Low voltage power (see the table below) for internal circuitry is provided from an on-board
transformer, powered by an external 120 or 240 VAC source. An onboard switch is used to select
input voltage. When using the UPC20+ for 277 VAC control, the on-board internal circuitry is
powered by a separate 120/240 VAC line, or from an optional 12 VDC power supply.
K1 and K2 are the power and motor control relay connections to P1 terminals 1 and 2, 3 and 4,
respectively. Each relay is capable of switching the following loads:
 Resistive Load 20 Amps at 120/240 VAC
 Fluorescent Ballast 6 Amps at 277 VAC
 Inductive Load 1 HP
The maximum total combined current through both relays is 20 Amps. There are two 12-gauge
jumpers that are wired to supply board power at 120/240 VAC, and to connect the common
terminals of the relays. The jumpers are removed as needed according to the wiring options
selected.
P2 Terminal Connections
The table below defines the inputs and outputs for Terminal P2.
P1 Terminal Connections
Terminal Input/Output Function
1 Output Load 1 out
2 Input Line 1 in
3 Output Load 2 out
4 Input Line 2 in
5 Input Neutral to transformer on PCB which supplies low voltage
6 Input Line to transformer on PCB which supplies low voltage
P2 Low Voltage Terminal Inputs/Outputs
Terminal Input/Output
1 +12 VDC out
2 Serial data in (IR sensor)
3 Ground
4 Ground (common)
5 Input 1
6 Input 2
7 Input 3
8 Input 4
9 +12 VDC in