
94 - Connecting Serial Devices
DeviceMaster Installation and Configuration Guide
: 2000594 Rev. F
Connecting Serial Devices
Four Screw Terminals (DM-2202)
This subsection discusses the following topics for the DM-2202 with 4 serial screw terminals. See
on Page 97 if the DeviceMaster has eight serial terminals.
•
Serial Terminal (4) Connectors
•
Serial Terminal (4) Null-Modem Cables (RS-232)
•
Serial Terminal (4) Null-Modem Cables (RS-422)
•
Serial Terminal (4) Straight-Through Cables (RS-232/485)
•
Serial Terminal (4) Loopback Signals
•
Serial Terminal (4) Connectors
Use the following table or drawings for signal information. The signals for
SERIAL2
are the same as
SERIAL1
.
RS-232†
TxD
RTS
RxD
CTS
RS-422/RS-485
Full-Duplex
TxD-
TxD+
RxD-
RxD+
RS-485
Half-Duplex
TRxD-
TRxD+
† RS-232 ground must be connected to the signal ground terminal.
CTS
RxD
RTS
TxD
RS-232
RxD+
RxD-
TxD+
TxD-
RS-422
RS-485 Full-Duplex
TRxD+
TRxD-
RS-485 Half-Duplex
† Ground must be connected to the appropriate signal ground terminal.
† Wire gauge: AWG 12-22
Signal
Ground
Not connected
Positive†
Return†
6-30VDC
Signal
Ground†
Chassis
Ground†
RS-232: Connecting the Ground
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