ProSoft Technology RLX2-IFH9E User Manual
Page 45
RLX2-IFHxE ♦ Industrial Wireless
Installing the Radios
Industrial Frequency Hopping Ethernet Radios
User Manual
ProSoft Technology, Inc.
Page 45 of 81
May 28, 2014
Note: A switch on the bottom of the RLX2-IFHxE radio allows you to specify whether the
termination resistors are external or Internal in regards to the RS-485 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. The switch positions are labeled "Term In" (internal) and
"Term Out" (external).
2.2.5 Radio RS-232 Cable Specifications
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
Null Modem Cable Wiring Diagram