DIRIS A40/A41 - RS485 - JBUS/MODBUS
®
4
DIRIS A40/A41 - Ref.: 536 103 B GB
PRELIMINARY OPERATIONS
Functions
The optional IP Communication module must be
connected to the DIRIS A40/A41 (réf. : 4825 0201,
4825 0202, 4825 1201, 4825 1202, 4825 U201, 4825
0207, 4825 0211, 4825 0213, 4825 0214�. It pro-�. It pro-
vides an RS485 serial link (2 or 3 wires� with JBUS/
MODBUS
®
protocol for the use of DIRIS A40/A41 from
a PC or PLC.
General points
Forastandardconguration,anRS485linkisusedto
connect up to 31 DIRIS or COUNTIS Ci with a PC or
a PLC over a distance of 1200 metres, using JBUS/
MODBUS
©
protocol.
DIRIS 109 E F
DIRIS 110 E F
Recommendations:
You should use a shielded twisted pair (LIYCY type). In
a disturbed environment or large network (in terms of
length) we recommend the use of a shielded twisted
pair (type LIYCY-CY).
A repeater (1 channel) or an arrestor (4 channels)
should be used if you intend to exceed the distance
(1200 m) and/or maximum number (31) of DIRIS.
Please contact us for more information.
NB :
A 120 ohm resistance (found on the additional module)
must be xed at both ends of the link.
Other solutions are available (modem, optical bre, etc.).
Please contact us.
GENERAL INFORMATION
For personnel and product safety please read the
contents of these operating instructions carefully
before connecting.
Check the following points as soon as you receive the
DIRIS A40/A41 package:
•thepackingisingoodcondition,
•theproducthasnotbeendamagedduringtransit,
•the product reference number conforms to your
order,
•thepackagecontainstheproductandtheoperating
instructions.
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