Mitsubishi Electronics FR-E720-0.1KSC to 15KSC ユーザーズマニュアル

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R/L1, S/L2, 

T/L3 *

AC power input

Connect to the commercial power supply. Keep these terminals open when using the high 
power factor converter (FR-HC) or power regeneration common converter (FR-CV).
 When using single-phase power input, terminals are R/L1 and S/L2.

U, V, W

Inverter output

Connect a three-phase squirrel-cage motor.

P/+, PR

Brake resistor connection

Connect a brake resistor (MRS type, MYS type, FR-ABR) across terminals P/+ and PR.
(The brake resistor can not be connected to the 0.1K or 0.2K)

P/+, N/-

Brake unit connection

Connect the brake unit (FR-BU2), power regeneration common converter (FR-CV) or high 
power factor converter (FR-HC).

DC power input

Connect the plus side of the power supply to terminal P/+ and minus side to terminal N/-.

P/+, P1

DC reactor connection

Remove the jumper across terminals P/+ and P1 and connect a DC reactor.

Earth (Ground)

For earthing (grounding) the inverter chassis. Must be earthed (grounded).

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STF

Forward rotation start

Turn ON the STF signal to start forward rotation and turn it OFF 
to stop.

When the STF and STR 
signals are turned ON 
simultaneously, the stop 
command is given. 

STR

Reverse rotation start

Turn ON the STR signal to start reverse rotation and turn it OFF 
to stop.

RH, RM, RL

Multi-speed selection

Multi-speed can be selected according to the combination of RH, RM and RL signals.

RES

Reset

Used to reset alarm output provided when protective circuit is activated. Turn ON the RES 
signal for more than 0.1s, then turn it OFF. Initial setting is for reset always. By setting Pr. 75, 
reset can be set to enabled only at fault occurrence. Recover about 1s after reset is cancelled.

SD

Contact input common

(sink) (initial setting)

Common terminal for contact input terminal (sink logic) and terminal FM.

External transistor 

common (source)

Connect this terminal to the power supply common terminal of a transistor output (open 
collector output) device, such as a programmable controller, in the source logic to avoid 
malfunction by undesirable current.

24VDC power supply 

common

Common output terminal for 24VDC 0.1A power supply (PC terminal).
Isolated from terminals 5 and SE.

PC

External transistor 

common

(sink) (initial setting)

Connect this terminal to the power supply common terminal of a transistor output (open 
collector output) device, such as a programmable controller, in the sink logic to avoid 
malfunction by undesirable current.

Contact input common 

(source)

Common terminal for contact input terminal (source logic).

24VDC power supply

Can be used as 24VDC 0.1A power supply.

Safety stop input terminal 

common

Common terminal for safety stop input terminals S1 and S2.

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S1

Safety stop input

 (Channel 1)

S1/S2 are safety stop signals for use with in conjunction with 
an approved external safety unit. Both S1/S2 must be used in 
dual channel form. Inverter output is shutoff depending on 
shorting/opening between S1 and PC, S2 and PC.
In the initial status, terminal S1 and S2 are shorted with 
terminal PC by shorting wire.
Remove the shorting wire and connect the safety relay module 
when using the safety stop function.

Input resistance 4.7k



Voltage when contacts are 
open
21 to 26VDC
When contacts are short-
circuited
4 to 6mADC

S2

Safety stop input

 (Channel 2)

 For more details, refer to the Safety stop function instruction manual (BCN-A211508-004). (Refer to the front cover for how to obtain the manual.)