Installation Instructions

T ask 14: Connecting +27 V DC P ower Chapter 2: UBS Macro B T S Installation Procedure
Power cabling and tie down requirements
T o control the inductance at the BTS DC power input due to the spacing between wires used
in the +27 V DC P ower Input Cable (DC), the feed (+V) and return ( -V) wires must be bound
together at intervals of 1 meter or less. Refer to Figure 2 -22 .
Figure 2 -22 +27 V DC power input cable (DC) wire tie -wr ap example
ti-cdma-05693.eps
TIE ALL CABLES AT 1 METER INTERVALS
+27 V Power Source
BREAKER 1
+27 V DC
PDU (Top View)
FRONT
REAR
+27 V DC
- 0 V DC
+27 V DC Power Input
Connector (ORANGE)
- 0 V DC
Contact/lug, DC connector housing and PDU input power
Figure 2 -23 shows the lugs and DC connector housing. This figure also shows the location at
which the +27 V DC Input P ower Cable (DC) connects to the rear of the PDU .
2 -60 68P09283A62 -2
PRELIMINARY A UG 2007