Connection Of Stand-Alone Option Units - Mitsubishi FR-E520-0.1KN Instruction Manual

2.2.6 Connection of stand-alone option units

The inverter accepts a variety of stand-alone option units as required.
Incorrect connection will cause inverter damage or an accident. Connect and operate
the option unit carefully in accordance with the corresponding option unit manual.
( 1 ) Connection of the dedicated external brake resistor (option)
(Cannot be connected to 0.1K and 0.2K)
Connect a brake resistor across terminals P (+) and PR. Connect a dedicated brake
resistor only.
(For the positions of terminals P (+) and PR, refer to the terminal block layout (page 17.)
FR-E520-0.4KN, 0.75KN, 5.5KN, 7.5KN
N
( 2 ) Connection of the BU brake unit (option)
Connect the BU brake unit correctly
as shown on the right. Incorrect
connection will damage the inverter.
Note: 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 fail, the resistor will be extremely
hot, causing a fire. Therefore, install a magnetic contactor on the inverter's
power supply side to shut off current in case of failure.
P1 P PR
Brake resistor
INSTALLATION AND WIRING
FR-E520-1.5KN to 3.7KN
PR
NFB MC
Inverter
R (L
S (L
T (L
(+)
P
P
BU brake unit
Brake unit
HC HB
OFF
28
P
Brake resistor
Motor
U
)
1
V
)
2
W
)
3
Remove jumpers.
(−)
N
Discharge resistor
HA HB HC TB
PR
PC
OCR
OCR
Constant-
voltage
−
power
+
supply
ON
MC
MC
IM
N
Comparator