Mitsumi electronic 55K, FR-F520-0.75K Connection of the conventional BU brake unit option

INSTALLATION AND WIRING

(2) Connection of the conventional BU brake unit (option)

Connect the BU brake unit correctly as shown below. Incorrect connection will damage the inverter.

NFB	MC	Inverter
		R 〈L1〉	U
		S 〈L2〉	V
		T 〈L3〉	W

Motor

IM

		Remove jumpers.
	P 〈+〉	N 〈–〉
T (Note 3)
		Discharge resistor
	P	HA HB HC TB	PR
	PC	OCR	OCR
		Constant-
		voltage
		power	-
		supply
			+
			Comparator
	BU brake unit		N
Brake unit
HC HB	OFF	ON
			MC
		MC

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 (16.40feet).

2.When the transistor in the brake unit fails, the brake transistor bacomes extremely hot and it has a chance to get fire. Therefore, install a magnetic contactor on the inverter's power supply side to shut off current in case of failure.

3.For the power supply of 400V class, install a voltage-reducing transformer.

(3)Connection of the FR-HC high power factor converter (option)

When connecting the high power factor converter (FR-HC) to suppress power harmonics, wire as shown below. Wrong connection will damage the high power factor converter and inverter.

After making sure that the wiring is correct, set "2" in Pr. 30 "regenerative function selection".

High power factor converter (FR-HC)

Inverter

R

S

T

MC1 MC2

R4

S4

T4

N

P

Y1 or Y2

RDY

RSO

SE

R 〈 L1〉

S 〈 L2〉 (Note 1)

R4

S4

T4

T 〈L3〉

From FR-HCL02

SD

R3

S3

T3

RES

X10 (Note 3)

MC2

External box

MC1

X11 (Note 3)

R2

S2

T2

N 〈 –〉

NFB

FR-HCL01

P 〈 +〉

R

S

T

R1 〈L11〉 (Note 1)

Power

S1 〈 L21〉

supply

25