SOCOMEC - Réf.: 678 623 G GB
35
ENGL
ISH
ENCLOSURES INSTALLATION (continued)
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GENERAL POINTS
For standard configurations, an RS
485 link is used to connect up to 31
ATI with a PC or a PLC over a distance
of 1 500 metres, using JBUS / MOD-
BUS
©
protocol.
N
°
1
N
°
2
N
°
n
R = 120
Ω
1500 M
R = 120
Ω
Programmable
controllers
Other systems
N
°
1
R = 120
Ω
RS485
0+- -+0
N
°
n
R = 120
Ω
1500 M
1500 M
Programmable
controllers
Other systems
repetor
DIRIS 109 B
DIRIS 110 B
Recommendations:
You should use a shielded twisted pair
(LIYCY type). In a disturbed environ-
ment 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
(1 500 m) and / or maximum number
(31) of ATI. Please contact us for
more information.
NB:
A 120 ohm resistance (found on the
additional module) must be fixed at
both ends of the link.
Other solutions are available (modem,
optical fibre, etc.). Please contact us.
A 3 minutes power off
action is required before
startup to allow option
recognition.
RS485
2 or 3 wires half duplex
Protocol
JBUS / MODBUS
®
protocol / RTU mode
Speed
2400, 4800, 9600, 14 400, 19 200, 28 800, 38 400 Bauds
Galvanic insulation
4 kV (1 min 50 Hz)
Option 8
Communication module
Read paragraph communication for
instructions.
Installation of this module allows RS485
connection. Protocoles avaible are
JBUS / MODBUS
®
.
ATI 058 A GB
