Four Screw Terminals; Serial Terminal (4) Connectors - Comtrol DeviceMaster PNIO 2000 Series User Manual

Connecting Serial Devices

Four Screw Terminals

Serial Terminal (4)
Connectors
44 - Connecting Serial Devices
This subsection discusses the following topics for the DeviceMaster with 4 serial
screw terminals. See Eight Screw Terminals
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
• Connecting Serial Devices
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-232 ground must be connected to the appropriate signal ground
Signal
Not connected
Ground
† Wire gauge: AWG 12-22
RS-232†
RS-422/RS-485
Full-Duplex
RS-485
Half-Duplex
† RS-232 ground must be connected to the signal ground terminal.
on Page 47 if the DeviceMaster has
on Page 44
on Page 46
on Page 46
RS-422
RS-485 Full-Duplex
TxD- RxD-
TxD+
RS-232: Connecting the Ground
Signal
Ground†
TxD
TxD-
TRxD-
DeviceMaster PNIO | UP User Guide: 2000639 Rev. A
on Page 45
on Page 45
on Page 45
RS-485 Half-Duplex
TRxD-
RxD+
TRxD+
Chassis
6-30VDC
Ground†
Return†
RTS RxD
TxD+ RxD-
TRxD+
Positive†
CTS
RxD+