Mitsumi electronic FR-F520-0.75K, 55K instruction manual Connection of stand-alone option units

INSTALLATION AND WIRING

2.2.5 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 accident. Connect and operate the option unit carefully in accordance with the corresponding option unit manual.

(1) Connection of the FR-BU brake unit (option)

Connect the optional FR-BU brake unit as shown below to improve the braking capability during deceleration.

T (Note 4)
MC					ON
					MC
R 〈L1〉	U	Motor
					OFF
S 〈L2〉	V	IM			MC
T 〈L3〉	W
Inverter		PR		PR	P
〈	+〉 P	P/+	HA		TH1
〈	–〉N	N/-	HB
			HC
					THS TH2
				Resistor unit
		Brake unit		FR-BR-(H)
					2
		FR-BU-(H)

Note: 1. Connect the inverter terminals (P, N) 〈+ , −〉 and FR-BU brake unit terminals so that their terminal signals match with each other. (Incorrect connection will damage the inverter.)

2.The wiring distance between the inverter, brake unit and resistor unit should be within 5m (16.40feet). If twisted wires are used, the distance should be within 10m (32.81feet).

3.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 a current in case of failure.

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

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