User Manual

AS4000 Central Terminal Installation and

Commissioning

DLP 004

605-0000-432

Issue 1.3a Date 18th October 1999

Page 1 of 4 Copyright Airspan Communications Corporation 1999

CT POWER AND ALARM CABLING

1. DC Power

The cables for the negative DC battery feeds, the 0V returns and the Rack Ground are

detailed in Table 2. Should local requirements specify otherwise, it is acceptable for

cables of other colours to be used, however, under no circumstances should the cable

sizes be less than that specified in Table 5. The length of the cable supplied will be

detailed in the site survey. Separate DC sources are desirable for maximum protection.

Function Colour Min. Cable Size

Negative Battery Feed Blue 10 AWG; 6.0mm

Zero Volt Battery Return Black 10 AWG; 6.0mm

Rack Ground Green/Yellow 8AWG; 10.0mm

Table 5. DC Power Cables.

Warning.

The maximum DC input should not exceed 60 Volts. Voltages in excess of this are

considered hazardous.

From the site survey confirm the location of the Isolator for the negative battery feed

points; then ensure that the supply is isolated. If the location is remote from the CT,

take appropriate action to ensure that the supply is not inadvertently reconnected. This

may include locking OFF an isolator, by taking its unique handle with you or ensuring

that replacement fuses are not easily installed. Provide a label at the CT to indicate the

location of the isolator or fuse positions mentioned above.

Run and tie in the two negative battery feeds and the two zero volt returns to each CT

rack installed. These should be rated at 30A. Power cables must be run and tied

separate from signal cables.

Note: Do not insert fuses until instructed to do so in the commissioning stage of

installation.

Run the DC cables through the top right hand side of the rack, loosen the screws on the

combiner shelf and slide the screen to the right. Place the DC cables behind the

screening and though to the connection block at the lower right of the combiner shelf.

return the screen to its original position. Re-tighten the combiner shelf screws.