Rs-232 Wiring Example With Handshaking; Rs-232 Basic 3-Wire Example - Campbell SDM-SIO1A Instruction Manual

SDM-SIO1A Serial Input/Output Module

3.3.5 RS-232 wiring example with handshaking

+12V
G
C1
C2
C3
RG
G
RTS/TD+
TX/TD-
RX/RD+
CTS/RD -

3.3.6 RS-232 basic 3-wire example

+12V
G
C1
C2
C3
RG
G
RTS/TD+
TX/TD-
RX/RD+
CTS/RD -
12
To logger
DTE
* Note CTS and RTS are optional if hardware
handshaking is not required. Not connecting the
handshaking lines will reduce the overall current
consumption of the SDM-SIO1.
To logger
DTE
0V
RS232 RTS
RS232 TX
RS232 RX
RS232 CTS
DCE
0V
RS232_CTS
RS232 TX
RS232 RX
RS232 RTS
DCE
RS232 DCE
equipment
RS232 DCE
equipment