21
Operating mode
SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8
RS232
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
RS422, RS485, 4-wire bus master
DTR handshake
OFF
OFF
OFF
ON
OFF
*
*
OFF
RS422, RS485, 4-wire bus maste
RTS handshake
OFF
OFF
OFF
OFF
ON
*
*
OFF
RS485, 4-wire / 2-wire with echo
DTR control
OFF
OFF
ON
ON
OFF
*
*
OFF
RS485, 2-Draht ohne Echo
DTR-Steuerung
ON
OFF
ON
ON
OFF
*
*
OFF
RS485, 4-wire / 2-wire with echo
RTS control
OFF
OFF
ON
OFF
ON
*
*
OFF
RS485, 2-wire without echo
RTS control
ON
OFF
ON
OFF
ON
*
*
OFF
RS485, 4-wire / 2-wire with echo
Automatic control
OFF
ON
OFF
ON
OFF
*
*
OFF
RS485, 2-wire without echo
Automatic control
ON
ON
OFF
ON
OFF
*
*
OFF
1.
Open the housing, following the instructions in this manual.
2.
Set the desired operating mode of the serial interface according to the table
shown above.
3.
Switch on the termination in RS422/485 mode via switches 6 and 7 if requi-
red.
4.
Close the housing again.
The serial interface now operates in the set operating mode.
The pinout of the serial data line is determined by the set operating mode. Ope-
ration in RS232 mode results in the following pinout:
Pin# Signal
Function
1
DCD
Input
2
RxD
Input
3
TxD
Output
4
DTR
Output
5
GND
Signal GND
6
DSR
Input
7
RTS
Output
8
CTS
Input
9
RI
Input
Summary of Contents for rule.box 53920
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