User Manual

ADCP-75-179 • Preliminary Issue A • September 2004 • Section 2: Description
Page 2-24
© 2004, ADC Telecommunications, Inc.
of the heating element and a circuit breaker provides overcurrent protection. The back-up
battery kit includes a wiring harness for connecting the battery to the STM. During normal
operation, the STM provides charging current to maintain the battery charge level. During an
AC power outage, the battery provides DC power to the STM to maintain system operation. The
battery can maintain operation of the RU for approximately 1 hour with the 50 Watt LPA and 2
hours with the 20 Watt LPA.
Figure 2-15. Back-Up Battery Kit
7.2 Wavelength Division Multiplexer System
The Wavelength Division Multiplexer (WDM) system is an accessory product that is used when
it is desirable or necessary to combine the forward and reverse path optical signals from one
Digivance system onto a single optical fiber. Each WDM system consists of a host module, host
module mounting shelf, and remote module. The WDM host module mounting shelf can
support two WDM host modules. The RU indoor mounting shelf and the outdoor cabinets
provide a mounting slot for installing a WDM remote module. The WDM host module and host
module mounting shelf are shown in Figure 2-16. The WDM remote module is shown in
Figure 2-17.
Figure 2-16. WDM Host Module and Host Module Mounting Shelf
17014-A
18646-A