Connecting The Inverter To Modbus - Hitachi CONVENTION 14 Instruction Manual

Connecting the Inverter to ModBus

Follow these steps in this section to connect the inverter to the ModBus network.
1. Open Serial Port Cover - The inverter keypad has a hinged dust cover protecting the
serial port connector. Lift the cover from the bottom edge, and tilt upward as shown
below.
2. Modular Interconnect Removal - With the serial port cover opened, notice the RJ45
modular connector behind it. Connect the serial cable and engage the locking tab in
the connector.
RJ45 connector
3. Cable Wiring - The inverter communications
port uses RS485 differential transceiver. The
pinout is shown to the right and listed below.
Be sure the cable connection you make
matches the diagram.
Pin Symbol
1
2
3
4
5 SP
6 SN
7
8
Description
Not used. Do not connect
Not used. Do not connect
Not used. Do not connect
Not used. Do not connect
Send data positive
Send data negative
Not used. Do not connect
Not used. Do not connect
1 2 3 4 5 6 7 8
B − 3
B 3