Comtrol Hub DeviceMaster - Manual (Page 97)

DeviceMaster Installation and Configuration Guide: 2000594 Rev. A Connecting Serial Devices - 97
Connecting Serial Devices
Serial Terminals (4) - 1E
This subsection discusses the following topics for the DeviceMaster 2-port 1E with
serial terminals (4). See
Serial Terminals (8) - 2E on Page 99 if the DeviceMaster
has eight serial terminals.
• Serial Terminal (4) Connectors on Page 97
• Serial Terminal (4) Null-Modem Cables (RS-232) on Page 98
• Serial Terminal (4) Null-Modem Cables (RS-422) on Page 98
• Serial Terminal (4) Straight-Through Cables (RS-232/485) on Page 98
• Serial Terminal (4) Loopback Signals on Page 99
• Connecting Serial Devices on Page 99
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 appropriate 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
† RS-232 ground must be connected to the appropriate signal ground
† Wire gauge: AWG 12-22
Signal
Ground
Not connected
Positive† Return†
5-30VDC
Signal
Ground†
Chassis
Ground†
RS-232: Connecting the Ground