16
RS 485 SERIAL PORT
On the same RS485 network, it is possible to connect up to 32 units
On the RS485 network normally one connects 2 termination resistors of 120 Ohm (shown with "R" in figure).
Only on the 2 devices which are at the end of the network.
Use an appropriate cable for RS485 connections, the twisted 2x24 AWG duplex cable, shielded with an
external sheathing + aluminium band. The length of the cable should not exceed 1200m.
If there is a transmission problem (long cable) connect a bias resistor of 390 Ohm between B (-) and GND.
If there is still a problem, put a 2 kOhm resistance between terminal A (+) and + supply (+ Vdc).
NU-IPE50-short guide-E-1214
To Previous Page
