Rice Lake iQUBE2 12 VDC Remote Power Supply User Manual
12 vdc remote power supply, Installation instructions, J1 j2
May 2009
110564
iQUBE
2
Digital Diagnostic Junction Box
12 VDC Remote Power Supply
Installation Instructions
PN 108434
This document contains procedures for installing the 12 VDC remote power supply, PN 108434. This power
supply is recommended for use in
iQUBE
2
installations that do not have AC power available at the scale
platform.
See the
iQUBE
2
Installation Manual, PN 106113, for general installation and configuration information. The
“Power Considerations” section of that manual includes a discussion of how to calculate current draw and
voltage drop for a given system.
Disconnect power before opening power
supply enclosure.
Use a wrist strap to ground yourself and
protect components from electrostatic
discharge (ESD) when working with circuit
boards.
This power supply provides 44 watts of power, with continuous current of 3.7 amps, to power a full system over
typical distances from scalehouse to scale. The power supply is mounted in an 8 x 6 x 4-inch NEMA 4X FRP
enclosure and includes a transient protection board, PN 109396. The transient board option for the
iQUBE
2
, PN
110949, includes the transient protection board and a mounting bracket for the
iQUBE
2
enclosure.
Figure 1 shows the transient protection board connectors. Wire the output DC power cable from the V+ and V–
terminals to the corresponding transient protection board terminals in the
iQUBE
2
enclosure.
Figure 1. Transient Protection Board Connections
The transient boards will handle the maximum current provided by the power supply, but large current loads
increase the voltage drop across the inductive chokes and could reduce the input voltage to the
iQUBE
2
system
below the 6 VDC minimum.
NOTE:
When using 4-wire power cable, the cable voltage drop between the remote power supply and the
iQUBE
2
can be
cut in half by using two wires for both the supply and return cable runs. Cabling can be doubled by wiring to both
V+ terminals and both V– terminals on the transient board connectors.
J1
J2
–
–
+
+