LTPH-UM-1088-02, Issue 2

Installation

 

 

The ThinMux chassis DC power supply feeds must be connected to either (1) -48 Vdc Safety Extra Low Voltage (SELV) sources or (2) -48 Vdc sources that are electrically isolated from the AC sector and reliably connected to earth. The source’s fault current capacity shall be lower than 50A, or an appropriate overcurrent protection, rated 5A, must be provided on each -48 Vdc conductor. The overcurrent protection can also be used as a cutoff switch if another disconnect device is not installed.

The ThinMux chassis is configured for redundant power. The A and B battery sources are independently connected to each multiplexer. In the event of a loss of power from one of the sources, an alarm is reported by the active multiplexer. Power is continually supplied to both slots in the chassis.

INSTALLING DS3 OR STS-1 INTERFACE CABLES

After mounting the chassis to the CO rack, select the appropriate interface for cable installation. (For information regarding multiplexer configuration and operation, refer to the specific multiplexer user manual.)

When installing components, wear an antistatic wrist strap. Avoid touching components on the circuit board.

ThinMux Chassis

January 3, 2002

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