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ADCP-75-169 • Issue 1 • June 2004
Page 21
© 2004, ADC Telecommunications, Inc.
6. Connect the Major and Minor alarm wire pairs to the appropriate terminals on the external
alarm system.
7. Dress and secure cable per standard industry practice.
4.12 DC Power Connections
The HU is powered by ± 21 to 60 VDC power (nominal ± 24 or ± 48 VDC). The power is fed to
the HU through a screw-down type terminal strip located on the rear side of the unit. Power to
the HU must be supplied through a fuse panel such as the 20 position PowerWorx GMT Fuse
Panel (available separately) and the power must be protected with a 3 Amp GMT fuse. Use the
following procedure to install the power wiring:
1. Obtain one pair of #18 AWG (1.00 mm) red and black insulated copper wire for use as the
power wiring.
2. Terminate one end of each wire with a fork terminal as shown in Figure 20.
3. Connect the power wires to the power terminal strip at the rear of the HU.
4. Route the free ends of the wires to the fuse panel and locate the terminals that will be used
for the power feed. Refer to the user manual provided with the fuse panel for specific
information.
5. Remove the fuse from the circuit that will power the HU.
Figure 20. DC Power Connections
17872-B
FORK
TERMINALS
#18 AWG
(1.0 mm)
COPPER
WIRE
+ (BLACK)
– (RED)