ADC Digivance NXD, Руководство по установке и обслуживанию, Страница: 35 / 84

ADCP-75-210 • Issue 1 • March 2007
Page 23
© 2007, ADC Telecommunications, Inc.
1.8 Rectifier Shelf
The Rectifier Shelf, shown in Figure 18 , is a chassis/backplane device that contains rectifier
modules and a Low Voltage Disconnect (LVD) unit. The shelf interconnects the rectifier
modules and LVD unit, and provides an interface to external connectors.
Typically, the rectifier shelf contains two rectifier modules. The center panel on the shelf can be
removed to add a third rectifier, providing N+ redundancy as more equipment is added to the
RAN chassis.
Figure 18. Rectifier Shelf
1.8.1 Rectifier Module
The rectifier module converts 240 VAC prime power into -48 VDC for use within the RAN.
Each rectifier has four LEDs, shown in
Figure 18 and described in Table 12 . The rectifiers are
controlled by the LVD unit under command of the STF2 module.
4 D OUT SMA connectors Diversity Out. 6 diversity outputs (bands A-F); each output being
used connects on one RDC module, in either same RAN or extension
RAN if present. Connection is made using cable 1955000P081
5 FLT Red LED Fault. Lights when module has failed and during start-up until mod-
ule has initialized
6 PWR Green LED Power. Lights when module has power
Table 11. P/MCPLR Modules Faceplate Components
REF # DESIGNATION DEVICE FUNCTIONAL DESCRIPTION
21319-A
2 1
3 4
OVER
VOLTAGE
PROTECTION
LED
DC OK
LED
AC OK
LED
OVER
TEMPERATURE
PROTECTION
LED
RECTIFIER
LOW VOLTAGE
DISCONNECT
(LVD) UNIT