Schneider Electric FBZ2, iFBZ, EOCR-i3BZ, 3BZ2 manual Bus connection through a SCA type junction box

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Communication Guide

Bus connection through a SCA type junction box

1.Master (PLC, PC or communication module)

2.Modbus cable (It is different according to the master side or a master having polarization combined to the other part of Bus)

3.Junction box

4.Modbus cable

5.Line terminators : 120Ω - 0.25W

Please use a cable with 2pair shieded twisted conductors for Interface protection.

It is adviced to isolate the Modbus cable 30cm(11.8in) at least from a power cable.

If necessary, intersect the Modbus cable to a power cable perpendicularly.

Refer to the diagram in the left side for the line terminator wiring.

2 wire MODBUS RJ45 connections

Pin on RJ45	Pin on nEOCR	EIA/TIA 485 name
4	D1	B/B’
5	D0	A/A’
8	V-	C/C’

Pin ‘S’ can be used for shield wire connection.

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Contents Page Page Bottom hole & terminal type Applications Public institutions EOCR-i3BZ/iFBZ/3BZ2/FBZ2 General FeaturesProtection functions Operating Condition & Setting Range Operation TimeAuxillary functions Communication function Applicable to i3BZ/iFBZSpecifications Time-current characteristic curve Over current Setting tips in definite TCC mode Over current and time setting tipsAlert Operation Pattern #3 Fail-safe operationFront face Current displayBar graph Phase digital ammeter function Buttons and Setting SequenceButton Description Parameter Description Setting sequence and menuMenu Parameter Description Default Alert *1Communication *2 Control terminals Trip cause indication and fault recordsPhase line Diagram Wiring ExamplesSingle phase line Diagram Single line DiagramDimensions Order Code RS485 bus connection Modbus network settingStandard connection Bus connection through a SCA type junction box Iksan Plant Head Office