PLX30 Series
Hardware Information
Ethernet and Serial Gateways
User Manual
ProSoft Technology, Inc.
Page 49 of 200
September 19, 2012
4.2.2 RS-232 - Null Modem (DTE without Hardware Handshaking)
This type of connection can be used to connect the gateway to a computer or
field device communication port.
Note:
If the port is configured to use RTS/CTS handshaking, then a jumper is required between the
RTS and the CTS line on the gateway connection.
4.2.3 RS-232 - DTE to DCE Modem Connection
This type of connection is required between the gateway and a modem or other
communication device.
For most modem applications, RTS/CTS handshakingshould be enabled in the
port configuration.