ADC Release 3.1 user manual Power UP a Cellworx STN Node, Cellworx STN Component Identification

1152700 • Issue 1 • February 2001 • Section 2 Operations and Maintenance

DLP-700

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POWER UP A CELLWORX STN NODE

Summary: This procedure provides instructions for verifying the source − 48 Vdc power supply.

1.Turn on the power source that will supply power to the system.

2.Use a multi-tester to measure the DC voltage at the source. When testing, place the positive probe on the − 48 V terminal and the negative probe on the COM or RTN terminal.

3.The measured voltage must be between − 42.5 Vdc and − 56.5 Vdc at the specified point. Was voltage within range specified? Note the polarity.

If No, proceed to step 4.

If Yes, continue with step 5.

4.The problem is in the power supply wiring or in the − 48 Vdc power supply. Isolate the problem using local troubleshooting practices and correct as required before installing power to the system. Repeat procedure after correcting problem.

5.Install fuses or engage the circuit breakers that supply power to the shelf. The front access cards should illuminate. This can be verified by observing the shelf alarm indicator on the front door panel. This will only light up if the SC cards are installed and an alarm is present. Refer to Figure 700-1.

Stop! You have completed this procedure.

SHELF

ALARM

INDICATOR

DOOR

HINGES

LOWER AIR INTAKE/

CABLE ROUTING TRAY

UPPER HEAT BAFFLE/

FIBER MANAGEMENT TRAY

ESD GROUND JACK

DOOR

LATCH

10479-C

Figure 700-1. Cellworx STN Component Identification

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© 2000, ADC Telecommunications, Inc.