Connection Of A Brake Unit - Mitsubishi Electric FR-A700 Instruction Manual

Connection of stand-alone option units
3.8.3

Connection of a brake unit

When connecting a brake unit to improve the brake capability at deceleration, make connection
as shown below.
Connection with the brake unit FR-BU (01800 or less)
3-phase AC
power supply
Fig. 3-35: Connection with the brake unit FR-BU
Connect the inverter terminals (P/+, N/−) and brake unit terminals so that their terminal
signals match with each other. (Incorrect connection will damage the inverter.)
If the control contacts are only specified for 230V control power you must install a transformer
when using a 400V power supply.
Be sure to remove a jumper across terminal PR-PX when using the FR-BU with the inverter
of 00250 or less.
The wiring distance between the inverter, brake unit and resistor unit should be within 5m.
If twisted wires are used, the distance should be within 10m.
b
CAUTION:
If the transistors in the brake unit should become faulty, the resistor can be unusually
hot, causing a fire. Therefore, install a magnetic contactor on the inverters input side
to configure a circuit so that a current is shut off in case of fault.
3 - 48
Inverter
≤ 5m
Wiring
ON
OFF
I001640E