Rs-485 Interface - WEG PLC300 H3 Guia De Instalacion

ATTENTION!
Do not connect the GND of the RS232 (pin 11) to the ground of the
system.
Note: For further information, consult the manual for serial communication, available
for download on the website: www.weg.net.

3.7 RS-485 INTERFACE

Insulated, multipoint serial interface intended for network communication. It can
operate as master or slave with the Modbus RTU protocol.
The S1 key allows the connection of termination resistors.
1 2
3
ENC ENC ENC
ENC
A
A B
Note: For further information, consult the manual for serial communication, available
for download on the website: www.weg.net.
4 5
6 7
ENC ENC ENC ENC
B Z Z +V*
Figure 3.8: Connecting the RS-485
9 10 11
8
232 232 232
0 V TX RX GND
Twisted pair
Digital Inputs
12 13 14
485 485
485
A B GND
PLC300 | 15