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Page 26
Chapter 5: Connecting
Bi-directional Serial RS-232/422/485
These bi-directional serial channels are used for RS-232, RS-422, and RS-485 communication. The maximum speed is 115,200
bps. The default mode for all channels is RS-232; you must set other modes in the programming application. For more details,
see the programming manuals.
RS-232 Mode
Output signal levels for RS-232 are in the -10 V to +10 V range. This is the default mode for all channels.
Table 5-7. RS-232 pinout.
SERIAL RS-232
5-pin 3.5 mm
Pin
Signal
Description
Direction
1 2 3 4 5
1
TxD
RS-232 Transmitted Data
From controller
2
RTS
RS-232 Request to Send
From controller
3
GND
Ground
—
4
RxD
RS-232 Received Data
To controller
5
CTS
RS-232 Clear to Send
To controller
RS-422 Mode
You must set this mode in the programming application.
Table 5-8. RS-422 pinout.
SERIAL RS-422
5-pin 3.5 mm
Pin
Signal
Description
Direction
1 2 3 4 5
1
Tx A+
RS-422 Transmit Data (Idles High)
From controller
2
Tx B-
RS-422 Transmit Data (Idles Low)
From controller
3
GND
Ground
—
4
Rx A+
RS-422 Receive Data (Idles High)
To controller
5
Rx B-
RS-422 Receive Data (Idles Low)
To controller
RS-485 Mode
You must set this mode in the programming application.
Table 5-9. RS-485 pinout.
SERIAL RS-485
5-pin 3.5 mm
Pin
Signal
Description
1 2 3 4 5
1
A+
RS-485 Data +
2
B-
RS-485 Data -
3
GND
Ground
4
N.C.
Not Connected
5
N.C.
Not Connected