Eight Screw Terminals (Dm-2402); Screw Terminal (8) Connectors - Comtrol DeviceMaster DM-2000 Series Installation And Configuration Manual

Eight Screw Terminals (DM-2402)

This subsection discusses the following topics for the DeviceMaster with 8 serial screw terminals.
•

Screw Terminal (8) Connectors

• Screw Terminal (8) Null-Modem Cables (RS-232)
• Screw Terminal (8) Null-Modem Cables (RS-422)
• Screw Terminal (8) Straight-Through Cables (RS-232/485)
• Screw Terminal (8) Loopback Signals
• Connecting Serial Devices
Screw Terminal (8) Connectors
Use the following drawings or table for signal information. The signals for SERIAL2 are the same as
SERIAL1.
CD RI
DSR
† Ground must be connected to the signal ground terminal.
Signal
Ground
RS-232
RS-422/RS-485
Full-Duplex
RS-485 Half-
Duplex
† Ground must be connected to the appropriate signal ground terminal.
DeviceMaster Installation and Configuration Guide: 2000594 Rev. F
on Page 97
on Page 99
on Page 99
RS-232
RS-485 Full-Duplex
TxD RxD
DTR RTS CTS
RS-232: Connecting the Ground
Not connected
† Wire gauge: AWG 12-22
CD DSR
N/A N/A
N/A N/A
on Page 98
on Page 98
on Page 99
RS-422
RS-485 Half-Duplex
TxD- RxD-
TxD+ RxD+
Signal
Chassis
Ground†
Ground†
RI DTR TxD
N/A N/A TxD-
N/A N/A TRxD-
Connecting Serial Devices
TRxD-
TRxD+
6-30VDC
Return†
Positive†
RTS RxD CTS
TxD+ RxD- RxD+
TRxD+ N/A N/A
Connecting Serial Devices - 97