User Manual

Chapter 3 Communication 21
Figur e 26: MOD E M m o d ule
R S -48 5 / 2 3 2 Co mmunicat i on p ort ( CO M4 – E TH or MO D E M
o ption a l mo dules)
The RS-485/232 Communication port – COM4 is provided by ETH optional module.
Each module with Communication port – COM4, provides two
indication GREEN LEDS:
"RX" GREEN LED, blinking led shows receiving data at COM4
"TX" GREEN LED, blinking led shows sending data at COM4
R S -48 5 m ode
In the RS-485 mode, the 485/232 wire must be left opened as shown in figure 27
Figur e 27: Seri a l Communic a tio n Netw o rk Con nect i o n – R S-4 8 5 COM 4