Options Atys 3E, 6E; Communication Module; General Points - socomec ATyS Série Notice D'utilisation

8. opTionS aTyS 3e, 6e

8.1. Communication module

Refer to Accessories Mounting to know modules mounting instructions. This module allows RS485 communication connection
via JBUS / MODBUS protocol.
®
RS485
Protocol
Speed
Galvanic insulation

8.1.1. General points

An RS 485 link is used to connect up to 31 ATyS with a PC or a
PLC over a distance of 1500 meters, using JBUS / MODBUS
protocol.
Recommendations
You should use a shielded twisted pair (LIYCY type). In an inter-
fearence environment or large network (in terms of length) we
recommend the use of 2 shielded pairs (type LIYCY-CY). In this
case, one pair is used for the + and the –, and another pair,
where the 2 wires are short-circuited, for the 0 V.
A repeater (1 channel) or an arrestor (4 channels) should be
used if you intend to exceed the distance (1500 m) and / or
maximum number (31) of ATyS. Please contact us for more
information.
A 120 ohm resistance (found on the RS485
optional module) must be fixed at both ends of
the link.
126 ATyS 3e, 6e, 6s - Ref.: 531 848 G GB
2 wires half duplex
JBUS / MODBUS in RTU mode
®
2400, 4800, 9600, 19 200, 38 400 Bauds
4 kV (1 min 50 Hz)
8.1.1-1
®
Programmable
controllers
Other systems
8.1.1-2
Programmable
controllers
Other systems
1200 M
R = 120
N 1 N 2
1200 M
0+- -+0
R = 120
N 1 repetor
RS485
N n
R = 120
1200 M
N n
R = 120