RACOM RipEX2, Руководство пользователя

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2.2.5. COM
RipEX2 provides serial interface COM terminated by DSUB9F connectors. It can be configured as
RS232 or RS485.
RS232 of RipEX2 is a hard-wired DCE (Data Communication Equipment) device. Equipment connected
to the serial port of RipEX2 unit should be DTE (Data Terminal Equipment) and a straight-through cable
should be used. If a DCE device is connected to the serial port of RipEX2, a null modem adapter or
cross cable has to be used.
RS485 of RipEX2 is not galvanic isolated and it is not terminated.
Tab. 2.3: COM pin description
COM – RS485 COM – RS232 DSUB9F
In/ Out Signal In/ Out Signal Pin
— Out CD 1
In/Out line B Out RxD 2
In/Out line A In TxD 3
— In DTR 4
GND GND 5
— Out DSR 6
— In RTS 7
— Out CTS 8
— — — 9
RipEX2 keeps pin 6 DSR at the level of 0 (state ON, approx. +6.2 V) by RS232 standard permanently.
Expansion board 'C' (2 x RS232)
The 2nd and 3rd COM ports are available when the Expansion board 'C' (2 x RS232) is installed. In
such a case: The DI/DO connector is used as a connector for COM2 and COM3.
COM2 and COM3 parameters:
COM2: RS232 - 5 pin (RxD, TxD, GND, RTS, CTS) 600 b/s to 2 Mb/s
COM3: RS232 -3 pin (RxD, TxD, GND) 2.4 kb/s to 921.6 kb/s
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