Service Manual

GSM-205-423
Installing and connecting power and earth cabling
31st Oct 01
Inst. 2–56
Installation & Configuration: Horizon macro indoor
CONTROLLED INTRODUCTION
68P02902W08-B
+ 27 V dc
connection
procedure
To connect dc power cables to a + 27 V dc cabinet:
WARNING
Each cabinet must be earthed separately and not daisy
chained together.
1. Route the earth wire from the building master earth and connect to the
earth stud on top of the cabinet. Tighten to correct torque (see
Installation
& Configuration: GSM-205-423
Site requirements and considerations).
WARNING
Do not make input power connections at the main power
source at this time. Connecting input power is the final
installation procedure in this chapter.
2. Thread the cone-shaped plastic covers onto the cables before connection.
3. Connect the black 0 volt (–ve) dc power cable to the cabinet dc power
connector assembly 0 V terminal, and route to the main dc power source.
4. Connect the red 27 volt (+ ve) dc power cable to the cabinet dc power
connector assembly V IN terminal, and route to the main dc power source.
5. Tighten the dc power connections (nuts on studs with star washers) to
correct torque as in step 1.
The + 27 volt dc power cable connection procedure is now complete.