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INSTALLATION AND WIRING
2
Connection diagram, PLG cable, PU
connector
2.2.6 Connection to the PU connector
(1) When connecting the operation panel or parameter unit using a connection cable
<Recommended connection cable>
• Parameter unit connection cable (FR-CB2) (option) or the following connector and cable available on the market
• Connector : RJ45 connector
Example: 5-554720-3 of Tyco Electronics Corporation
• Cable : Cable conforming to EIA568 (e.g. 10BASE-T cable)
Example:
SGLPEV 0.5mm x 4P(twisted pair cable, 4 pairs) of Mitsubishi Cable Industries, LTD.
• Maximum wiring length : 20m
(2) For computer link communication
Using the PU connector, you can perform communication operation from a personal computer etc. By connecting
the PU connector to computers such as a personal computer and FA unit with a communication cable, you can run/
monitor the inverter and read/write parameter values using a user program.
Refer to the Instruction Manual (detailed) for details.
• Conforming Standard : EIA Standard RS-485
• Transmission form : Multidrop link system
• Communication speed : Maximum 19200bps
• Overall length : 500m
2.2.7 Notes on earthing (grounding)
!
Leakage currents flow in the inverter. To prevent an electric shock, the inverter and motor must be earthed
(grounded).
Use the dedicated earth (ground) terminal to earth (ground) the inverter. (Do not use the screw in the case, chassis,
etc.)
!
Use the largest possible gauge for the earth (ground) cable. The gauge should be equal to or larger than those
indicated in the following table. The earthing (grounding) point should be as near as possible to the inverter to
minimize the earth (ground) cable length.
!
Earth (Ground) the motor on the inverter side using one wire of the 4-core cable.
CAUTION
Do not connect the PU connector to the computer's LAN board, FAX modem socket or telephone con-
nector. Doing so may damage the inverter due to electrical specification differences.
Motor Capacity
Earth (Ground) Cable Gauge
200V class 400V class
2.2kW or less 2 2
3.7kW 3.5 2
5.5kW, 7.5kW 5.5 3.5
11kW, 15kW 14 8
18.5kW to 37kW 22 14
45kW, 55kW 38 22