3. Connectors
3.1. Antenna
Fig. 3.1: Antenna connector SMA
There is an SMA-jack antenna connector on the radio modem
panel. Use only the respective type of connector of the respective
impedance on your antenna cable : SMA-plug, 50 Ω. It is recom-
mended to use antenna coaxial cables like this: RG58 up to 10m,
RG213 up to 25m, H1000 for longer.
Important
A radio modem may be destroyed if an antenna or dummy load antenna is not connected.
3.2. Serial interface
Fig. 3.2: RS232 DSUB9 female
Tab. 3.1: RS232
signal
DSUB9F
pin
CD
1
RxD
2
TxD
3
DTR
4
GND
5
DSR
6
RTS
7
CTS
8
+PWR
9
3.3. Ethernet interface
Fig. 3.3: RJ-45F
•
Ethernet connector RJ-45 for 10BaseT and 100BaseT fully matches
the standard of Power over Ethernet IEEE802.3af.
•
The radio modem recognizes a standard or crossed cable and ad-
apts itself automatically.
3.4. Power supply
There are 2 possibilities for the power supply:
•
AUX – via RS232 DSUB9 connector, using pins 5 and 9 (see Sec-
tion 3.2, “Serial interface”). Voltage 10.5-30 V, nominal 13.8 V.
To connect the power supply via RS232 connector, can be used REPWR adaptor.
21
© RACOM s.r.o. – Narrowband radio modem ECONOMY RE400
Connectors
