RACOM PROFI MR160, Руководство по эксплуатации

Страница: 6 / 17

3. MR 400 Connectors
Antenna
The antenna connector is of the N type, female, impedance 50 Ohm. The antenna cable must be fitted with an
appropriate mate. We recommend using the RG213 50 Ohm cable. The H1000 cable should be used when the
length of the antenna feeder exceeds 25 m.
Important
CAUTION. The radio modem should be powered only when the antenna (or artifical load) is
connected. Otherwise it could lead to damage to the radio part of the modem.
Serial Interface
According to the configuration of the radio modem it is possible to use a terminal block or DSUB 9 (Canon)
connectors for connecting data cables via the serial interface. See Chapter 6 Labelling radio modems.
RS232, RS422 and RS485 Connectors
Table 3.1. Table of data cable connections
Terminals RS232 DSUB9F RS422 Canon RS422
1 CTS 8 TxD- 7
2 RTS 7 TxD+ 3
3 RxD 2 RxD- 8
4 TxD 3 RxD+ 2
5 GND 5 GND 5
When RS485 interface is needed, the RS422 pin layout applies. It is necessary to shortcut TxD- to RxD- and
Txd+ to RxD+ to obtain the respective Data-, Data+ RS485 signals.
Distinguishing Data Modules by Colour
For RS232 RxD is the output from the radio modem (approx. -8V when inactive) and TxD is the input to the
radio modem (according to the RS 232 standard). Hardware versions of the interface can be distinguished
according to the colours of LED diodes next to the connector.
Table 3.2. Table for distinguishing LEDs for RxD and TxD by colour
Type of interface Colour (RxD / TxD)
RS232 red / green
RS232 optically coupled orange / green
RS422/485 optically coupled orange / yellow
6