Comtrol UP DeviceMaster Installation - Manual (Page 49)

Hardware Installation and Configuration Guide: 2000451 Rev. J Connecting Serial Devices - 49
Connecting Serial Devices
Serial Terminal (4)
Loopback Signals Use this drawing to wire a loopback, which is used
in conjunction with application software to test
serial ports.
Wire the terminals together to create a loopback.
• TxD to RxD
• RTS to CTS
Connecting Serial
Devices Use the following information to connect the DeviceMaster UP 2-port 1E with
serial terminals.
1. Connect your serial devices to the appropriate serial port on the DeviceMaster
UP 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 84 for information about
the LEDs.
Serial Terminals (8) - 2E
This subsection discusses the following topics for the DeviceMaster UP 2-port 2E
with serial terminals (8).
• Serial Terminal (8) Connectors on Page 49
• Serial Terminal (8) Null-Modem Cables (RS-232) on Page 50
• Serial Terminal (8) Null-Modem Cables (RS-422) on Page 51
• Serial Terminal (8) Straight-Through Cables (RS-232/485) on Page 51
• Serial Terminal (8) Loopback Signals on Page 51
• Connecting Serial Devices on Page 52
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.