Connection of the brake unit (BU type). Mitsubishi Electric FR-F806-E-L2 (IP55/UL Type 12

Connection of stand-alone option units

2.9.3

Connection of the brake unit (BU type)

Connect the brake unit (BU type) correctly as shown below. Incorrect connection will damage the inverter. Remove the jumpers across terminals HB and PC and terminals TB and HC of the brake unit and fit one across terminals PC and TB.

The BU type is compatible with the FR-F846-01160(55K) or lower.

ON OFF

T ∗1

MC

Three-phase

AC power supply

MCCB MC

R/L1

S/L2

T/L3

Inverter

U

V

W

N/-

P/+

Motor

M

MC

Brake unit

(BU type)

Discharging resistor

N

OCR

TB

OCR HC

HB

HA

PC

PR

P

Remove the jumper

Fit a jumper

 Install a stepdown transformer.

NOTE

• The wiring distance between the inverter and brake unit (BU type), and between the brake unit (BU type) and discharging resistor must be within 2 m. Even when the cable is twisted, the wiring length must be within 5 m.

• If the transistors in the brake unit should becomes faulty, the resistor will overheat and result in a fire. Install a magnetic contactor on the inverter's input side and configure a circuit that shut off the current in case of a fault.

• Remove the jumper across terminals P/+ and P1.

54

INSTALLATION AND WIRING