Installation Instructions

R20 1X UBS Macro B T S Hardw are Installation T ask 14: Connecting +27 V DC P ower
Task 14: Connecting +27 V DC Power
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Objectives
T ask 14 is performed for +27 V DC UBS Macro BTS only .
The objectives of this procedure are as follows:
• A ttaching the contact/lugs, connector and cable clamp on the +27 V DC power input
cable wires.
• Connecting the +27 V DC input power cable to the rear of the PDU .
• Routing the loose ends of the wires to the site +27 V DC source for connection.
Frame power cables and connector information
The wire gauge (that is, diameter) depends on the required length of the DC power cable (DC).
Refer to T able 2 -8 for the correct wire size.
The DC connector contact/lug size depends on the wire gauge used for the DC power cable (DC).
Refer to T able 2 -14 for DC connector contact/lug part information.
In order to minimize current imbalance between the feed (+V) and return ( -V) wires used in
the cable:
• Ensure that the wire size, length and gage, of each wire used in the cable are the same.
• Ensure that contacts/lugs used in the connector are identical and match the gauge of
the wire.
Motorola recommends using 2/0 A WG cables for short cable runs; less than 661.11
cm (21.69 ft).
Table 2 -14 +27 V DC connector (Or ange) parts information
Item Description Part Number
Qty
Orange DC connector housing Anderson P ower Products Mfr
P art# 932, or Allied Electronics
Stk# 803-0097
1 per +27 V DC power feed
Continued
68P09283A62 -3 2 -55
PRELIMINARY A UG 2007