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2.4
Connection of stand-alone option unit
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.
2.4.1
Connection of a dedicated external brake resistor (MRS type, MYS type, FR-ABR)
(0.4K or more)
Install a dedicated brake resistor (MRS type, MYS type, FR-ABR) outside when the motor is made to run by the load, quick
deceleration is required, etc. Connect a dedicated brake resistor (MRS type, MYS type, FR-ABR) to terminal P/+ and PR.
(For the locations of terminal P/+ and PR, refer to the terminal block layout (page 16).)
Set parameters below.
Connected Brake Resistor
MRS type, MYS type
MYS type
(used at 100% torque / 6%ED)
FR-ABR
NOTE
The brake resistor connected should only be the dedicated brake resistor.
FR-E720-0.4K, 0.75K
FR-E720S-0.4K
FR-E710W-0.4K
Connect the brake resistor across terminals P/+ and PR. Connect the brake resistor across terminals P/+ and PR.
Brake resistor
FR-E720-5.5K to 15K
Connect the brake resistor across terminals P/+ and PR. Connect the brake resistor across terminals P/+ and PR.
Jumper
*1
Brake resistor
∗1
Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor. (Not available for single-phase 100V power input model.)
∗2
The shape of jumper differs according to capacities.
Pr. 30 Regenerative function selection
Setting
0 (initial value)
1
1
Jumper
*1
Terminal P/+
Terminal PR
Terminal P/+
Terminal PR
Connection of stand-alone option unit
Pr. 70 Special regenerative brake duty Setting
6%
7.5K or less
11K or more
FR-E720-1.5K to 3.7K
FR-E740-0.4K to 3.7K
FR-E720S-0.75K to 2.2K
FR-E710W-0.75K
Terminal PR
Brake resistor
FR-E740-5.5K to 15K
Jumper
Terminal P/+
Terminal PR
Brake resistor
—
Refer to page 125
10%
6%
Jumper
*1
Terminal P/+
*1*2
2
31
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