ADCP-75-169 • Issue 1 • June 2004

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.

4.12DC 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.

+ (BLACK)

– (RED)

FORK

#18 AWG

TERMINALS

 

(1.0 mm)

 

COPPER

 

WIRE

17872-B

Figure 20. DC Power Connections

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© 2004, ADC Telecommunications, Inc.