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7.
Installation
7.4. Wiring Diagram
■3-phase 4-wire system, direct input
①Auxiliary power supply
100 V AC to 240 V AC or 100 V DC to 240 V DC
②Fuse (recommendation)
Rated current: 0.5 A, Rated breaking capacity: 250 V AC 1,500 A / 250 V DC 1,500 A (a UL certified product)
③If MODBUS RTU devices do not have the SG terminal, the wiring between SG terminals is not necessary.
④Install 120-Ohm terminating resistors between terminals 'T/R+' and 'T/R-' for devices at both ends of MODBUS RTU
communication line.
Note1: For low voltage circuits, it is not necessary to ground the VT and CT secondary sides.
■3-phase 4-wire system, with VT
①Auxiliary power supply
100 V AC to 240 V AC or 100 V DC to 240 V DC
②Fuse (recommendation)
Rated current: 0.5 A, Rated breaking capacity: 250 V AC 1,500 A / 250 V DC 1,500 A (a UL certified product)
③If MODBUS RTU devices do not have the SG terminal, the wiring between SG terminals is not necessary.
④Install 120-Ohm terminating resistors between terminals 'T/R+' and 'T/R-' for devices at both ends of MODBUS RTU
communication line.
Note1: For low voltage circuits, it is not necessary to ground the VT and CT secondary sides.
108
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