Fuji Electric FRENIC-AQUA series User Manual page 23

(3) Connection 1 to host (Multi-drop connection using the RJ-45 connector)
The figure below shows a connecting example to the multi-drop circuit with RJ-45
connector. RJ-45 needs a multi-drop branch adaptor as an external device for relaying.
The adaptor for relaying is not necessary for the inverter with RJ-45 connector for function
expansion. Turn ON the terminating resistor insertion switch on the terminating inverter.
For details about insertion switch ON/OFF, see Section 2.2.2 "Connection notes, [2] About
terminating resistors."
Figure 2.3 Multidrop connection diagram (connection via the RJ-45 connector)
Converter:
Branch adapter for multidrop: Useful when implementing 1:n multidrop configuration using a
Cable:
- The RJ-45 connector has the pins connected to the keypad power supply (pins 1, 2,
3, 7 and 8). When connecting the inverter with a device such as other inverters via a
communications cable, take care not to connect the wiring of the device to those
pins assigned to the power supply. Use signal lines (pins 4 and 5) only.
- When selecting additional devices to prevent the damage or malfunction of the
control PCB caused by external noises or eliminate the influence of common mode
noises, be sure to see Section 2.2.3 "Connection devices."
- Keep the total wiring length 500 m max.
Not necessary if the host is equipped with RS-485 interface.
cable with a RJ-45 connector.
Use a connection cable meeting the specifications.
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