Comtrol Hub DeviceMaster - Manual (Page 91)

DeviceMaster Installation and Configuration Guide: 2000594 Rev. A Connecting Serial Devices - 91
Connecting Serial Devices
This section discusses connecting your serial devices to the DeviceMaster. It also
provides you with information to build serial or test cables and loopback
connectors to test the serial ports.
• DB9 Connectors
• RJ45 Connectors on Page 94
• Serial Terminals (4) - 1E on Page 97
• Serial Terminals (8) - 2E on Page 99
Note: Go to Building the Serial Ribbon Cable on Page 18 for connector
information for the DeviceMaster 1-Port Embedded adapter.
Make sure that you have configured the ports using the NS-Link driver
or SocketServer for the correct communications mode before
connecting any devices. The default mode is RS-232. There is a remote
possibility that connecting a serial device for the wrong mode could
damage the serial device.
Note: The DeviceMaster LT provides different RJ45 pin outs and is not discussed
in this guide. Refer to the DeviceMaster LT User Guide for product-specific
information.
DB9 Connectors
This subsection provides the following information:
• Connector pin assignments (below)
• DB9 Null-Modem Cables (RS-232) on Page 92
• DB9 Null-Modem Cables (RS-422) on Page 92
• DB9 Straight-Through Cables (RS-232/485) on Page 92
• DB9 Loopback Plugs on Page 93
• Connecting DB9 Serial Devices on Page 93
Note: The DeviceMaster Serial Hub only supports RS-232.
Caution
DB9 Connector Pinouts
Pin RS-232
RS-422
RS-485 Full-Duplex (Master/Slave)†
RS-485
Half-Duplex
1 DCD Not used Not used
2 RxD RxD- Not used
3 TxD TxD- TRxD-
4 DTR Not used Not used
5 GND GND GND
6 DSR Not used Not used
7 RTS TxD+ TRxD+
8 CTS RxD+ Not used
9 RI Not used Not Used
† Only 2-port models support RS-485 full-duplex.