Installation Manual

Table Of Contents
R20 1X UBS Macro B T S Hardw are Installation T ask 14: Connecting +27 V DC P ower
Procedure 2 -8 Procedure for T ask 14 (Continued)
2
Ensure that the +27 V DC P ower Input Cable (DC) is NOT connected to the
main +27 V DC power source. Turn OFF the main +27 V DC power source.
3
Remove the components from the DC connector package.
4
Strip 35 mm of insulation from the negative (- V) and positive (+V) wires of
the power cable.
5
Place a DC contact/lug on the negative (- V) and positive (+V) wires of the
power cable. Refer to Figure 2-21 .
6
Using the appropriate crimping tool, crimp the DC contact/lug on to the
wires.
7
Observe the negative (- V) and positive (+V) wire polarities and insert the
DC contacts/lugs into the DC connector housing until an audible click is
heard. Refer to Figure 2-21 .
8
V erify the positive (+V) wire is installed in the positive position and the
negative (- V) wire is installed in the negative (-) position on the connector
housing.
9
Ensure that the wires are firmly fastened to the DC connector housing.
10
Tie the positive (+V) and negative (- V) wires of the cable together as shown
in Figure 2-20 .
1 1
Route the loose end of the +27 V DC P ower Input Cable (DC) to the site +27
V DC source and connect the wires to the source.
12
V erify that proper polarity is maintained from the +27 V DC power source to
the UBS Macro BTS .
13
Use a Digital Multi-Meter (DMM) to measure the voltage
of the DC connector housing that was installed in step 7 .
P erform the following:
Set the DMM to measure 27 V DC .
Connect the DMM negative (GND/common) lead to the (-) terminal of
the cable connector .
Connect the DMM positive lead to the (+) terminal of the cable
connector .
14
Turn on the main +27 V DC power source.
15
Observe the DMM and verify that the voltage is nominally +27 V (range =
+26 to +28 V).
16
Turn off the main +27 V DC power source.
17
Disconnect the DMM from the cable connector .
18
Connect +27 V DC P ower Input Cable (DC) connector to the +27 V DC
input power cable on the rear of the PDU ; Orange connectors mate. Refer
to Figure 2-21 .
68P09283A62 -3 2 -59
PRELIMINARY A UG 2007