ProSoft Technology RLX-IFH9E-A - Manual (Page 62)

Installing the Radios RLX-IFHE ♦ RadioLinx Industrial Wireless
User Manual RadioLinx® Industrial Frequency Hopping Ethernet Radios
Page 62 of 109 ProSoft Technology, Inc.
November 19, 2013
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-IFHE 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.
Radio RS-232 Cable Specifications
The Radio is a DCE device.
The PC is a DTE device.
The following shows the wiring of the straight-through DB-9 serial cable used to
connect:
 A radio to a PLC, PC, or other DTE device
 A radio to another DCE device
Straight-through Serial Cable