IGS-NT Communication Guide
42
Equipment
Equipment needed
Controller side -
Connection RS 485 cable (page 82) - Twisted pair, length up to 1 km
Other device
side
RS485 connection or RS485/RS232 or USB converter
3.4.2 RS232/RS485 – MODBUS (I-LB+)
Note: I-LB+ module enables monitoring and configuration up to 32 controllers interconnected via CAN(2)
intercontroller bus. It is also possible to use I-LB+ for single controller connection.
I-LB+ hardware setup
(all jumpers in those positions)
HW/SW control No matter
ComAp/ModBus Close
ADDR1/ADDR2
Selection of CAN address. Open = ADDR1, Close = ADDR2 It is possible to use up to
two I-LB+ devices in direct mode on CAN(2) bus. Let jumper open in case of using one
I-LB+ module. Other I-LB module has to have this jumper closed. (read more about
Comms extension - I-LB+ Local bridge (page 64))
DIRECT/MODEM No matter
RS485/RS232 Selection of communication port (jumper is in RS232 or RS485 position)
Comm. speed.
Selection of communication speed by jumpers P13, P14 to 9600, 19200, 38400, 57600
bps
RS485 120 Ohm Open = terminator not connected, Close = terminator connected
CAN 120 Ohm Open = terminator not connected, Close = terminator connected
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