ProSoft Technology RLX-IFH24S-A - Manual (Page 56)

Guide to the RLX-IFHS User Manual RLX-IFHS ♦ RadioLinx Industrial Wireless
User Manual RadioLinx® Industrial Frequency Hopping Serial Radios
Page 56 of 107 ProSoft Technology, Inc.
November 19, 2013
RS-232: Null Modem Connection (No Hardware Handshaking)
This type of connection can be used to connect the radio to a computer or field
device communication port.
Note: If the serial device is configured with to use the CTS line, then a jumper is required between
the RTS and the CTS line on the radio connection.
RS-485
The RS-485 interface requires a single two or three wire cable. The Common
connection is optional and dependent on the RS-485 network. The cable required
for this interface is shown below:
Note: The red switch on the bottom of the RLX-IFHS radio allows you to specify whether the
termination resistors are external or Internal in regards to the radio’s RS-485/RS-422 connector.
Terminating resistors are generally not required on the RS-485 network, unless you are
experiencing communication problems that can be attributed to signal echoes or reflections. In this
case, try changing the settings for termination on the radio.