Connection To The Stand-Alone Option; Connection Of The Brake Unit (Bu Type) - Mitsubishi Electric FR-S500E Instruction Manual

Connection to the Stand-Alone Option

1.6 Connection to the Stand-Alone Option

The inverter accepts a variety of stand-alone option units as required.
Incorrect connection will cause inverter damage or accident. Connect and operate the
option unit carefully in accordance with the corresponding option unit manual.
1.6.1

Connection of the brake unit (BU type)

Connect the BU type brake unit correctly as shown below. Incorrect connection will
damage the inverter. Remove jumpers across terminals HB-PC and TB-HC and
connect a jumper across terminals PC-TB of the brake unit.
NFB
Power
supply
Connect a
jumper.
CAUTION
1. The wiring distance between the inverter, brake unit and discharge resistor
should be within 2m. If twisted wires are used, the distance should be within
5m.
2. 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
inverter's power supply side to shut off a current in case of fault.
3. When the power supply is 400V class, install a step-down transformer.
T(Caution 4)
MC
ON
OFF
MC
PC HA HB HC TB
OCR
MC Inverter
L1
L2
L3
(Caution 3)
+
Discharge resistor
Remove
jumpers.
P
BU(-H) type brake unit
36
Motor
U
V
IM
W
-
PR
OCR
N