Comtrol Hub DeviceMaster - Manual (Page 99)

DeviceMaster Installation and Configuration Guide: 2000594 Rev. A Connecting Serial Devices - 99
Connecting Serial Devices
Serial Terminal (4)
Loopback Signals Use this drawing to wire a loopback, which is used
in conjunction with application software (Test
Terminal for Windows or minicom for Linux) to test
serial ports.
Wire the terminals together to create a loopback.
• TxD to RxD
• RTS to CTS
Note: You can use Test Terminal (Windows) or
minicom (Linux) to test the serial port. You
can refer to
Testing Ports Using Test
Terminal on Page 156 for Windows systems.
Connecting Serial
Devices Use the following information to connect the DeviceMaster 2-port 1E with serial
terminals.
1. Connect your serial devices to the appropriate serial port on the DeviceMaster
using the appropriate cable. You can build your own cables or loopbacks using
the appropriate discussions.
Note: Refer to the hardware manufacturer’s installation documentation if you
need help with connector pinouts or cabling for the serial device.
2. You can refer to Network and Device LEDs on Page 169 for information about
the LEDs.
Serial Terminals (8) - 2E
This subsection discusses the following topics for the DeviceMaster 2-port 2E with
serial terminals (8).
• Serial Terminal (8) Connectors on Page 99
• Serial Terminal (8) Null-Modem Cables (RS-232) on Page 100
• Serial Terminal (8) Null-Modem Cables (RS-422) on Page 101
• Serial Terminal (8) Straight-Through Cables (RS-232/485) on Page 101
• Serial Terminal (8) Loopback Signals on Page 101
• Connecting Serial Devices on Page 102
Serial Terminal (8)
Connectors Use the following drawings or table for signal information. The signals for
SERIAL2 are the same as SERIAL1.
TxD RxD RTS CTS
RS-232†
RS-422
RS-485 Full-Duplex
RS-485 Half-Duplex
CD
DSR
RI TxD
RTS
RxD
CTS DTR
TxD-
TxD+
RxD-
RxD+
TRxD-
TRxD+
† RS­232 ground must be connected to the appropriate signal ground terminal.