6.3. Supplying power to the equipment
A power supply has to meet technical specifications of the equipment powered, see Section 4 Table
of Technical parameters. Radio modem can be powered either over the Ethernet interface according
to the PoE (Power over Ethernet) standard or over the SCC (RS232) interface by DC voltage 10.8-30V
(13.8V nominal). When powering over SCC we recommend one of the MORSE power supplies, e.g.
MS2000
2
, which were specially designed for supplying of radio modems. MS2000 and MSU120 can
provide seamless switching to a backup battery while monitoring its state and charging it in an optimum
way. When using PoE, we can also recommend a RACOM PoE power supply which includes battery
backup option.
The following pictures show the four possible variants of power supply.
POWER
SUPPLY
MAST
DRAIN HOLE
DOWN
ANTENNA
HEIGHT
COAX LOOP
ANTENNA
CONECTOR WITH
WATER-PROOFING TAPE
COAXIAL RG58 < 10 m, RG213 < 20 m, H1000 > 20 m
SWITCHGEAR
IP54
ETH
ETH + POE
LIGHTING
ARESTOR
~230 V
RADIOMODEM
TECHNOLOGY
PWR
TX
RX
ETH
232
STATUS
R
E
POE
VER. 1
Fig. 6.1: Supplying power over the ethernet interface, using a PoE P.S.
2
http://www.racom.eu/eng/products/ms2000.html
Narrowband radio modem ECONOMY RE400 – © RACOM s.r.o.
30
Radio modem installation