User's Manual

Antenna Controller User Manual Ver. 1.00
Electrical Installation
P/N 1100031 page 6-5
Each Antenna Controller unit is connected to the Site Controller network via
RS485 communication cable in daisy chain fashion. Communication lines are
connected in parallel.
Note: Use a shielded twisted pair cable.
Figure 6-5:RS422 Serial connection to
Antenna Controller Network
Power Supply
A single Site Controller supplies power to a limited network of Antenna Controllers.
Power supply to all system elements should take into consideration the total and
distributed current loads according to the routing topology of the supply lines with
the associated voltage drops. Class 2 limits the maximum allowed current via field
wiring to 8A. This actually means a maximum rating of about 5A for the fuse on the
transformers secondary circuit.
6.3 Transformer
The Site Controllers transformer is intended to convert the incoming AC power
(115/230) to 12VAC @ 3.3A used to power the Site Controller GBI 2.0 board and a
limited number of Antenna Controller units.
6.4 Fuses
The Site Controller’s AC supply system is protected by three fuses, one on the
transformer’s primary circuit and two (in series) on the transformer’s secondary
circuit.
To comply with class 2 requirements, the 5A slow blow fuse on the transformer’s
secondary circuit is non-replaceable. The 3A fuse placed in series with this 5A
fuse is replaceable and is intended to blow before the 5A fuse.
Table
6-2
: Glass Fuses
Description Rating Type Recommended
Manufacturer/Series
Transformer primary circuit
Replaceable
1A Fast acting - ELU 179021, 1A
- Little Fuse 235001
Transformer secondary circuit
Replaceable
3 - 3.15A Fast acting - ELU 179021, 3.15A
- Little Fuse 235003