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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)
Install a dedicated brake resistor (MRS type, MYS type, FR-ABR) outside when the motor driven by the inverter 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 15).)
Set parameters below.
Connected Brake Resistor
MRS type, MYS type
MYS type
(used at 100% torque/6%ED)
FR-ABR
FR-D720-1.5K to 3.7K
FR-D740-0.4K to 3.7K
FR-D720S-1.5K, 2.2K
FR-D710W-0.75K
Connect the brake resistor across terminals P/+ and PR. Connect the brake resistor across terminals P/+ and PR.
Terminal PR
Brake resistor
FR-D720-5.5K, 7.5K
FR-D740-5.5K to 15K
Connect the brake resistor across terminals P/+ and PR. Connect the brake resistor across terminals P/+ and PR.
Jumper
Terminal P/+
Brake resistor
Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor. (Single-phase 100V power input model is not compatible with
DC reactor.)
The shape of jumper differs according to capacities.
Pr. 30 Regenerative function selection Setting
0 (initial value)
1
1
Jumper
*1
Terminal P/+
*1, *2
Terminal PR
Connection of stand-alone option unit
Pr. 70 Special regenerative brake duty Setting
6%
7.5K or lower
11K or higher
FR-D720-0.4K, 0.75K
FR-D720S-0.4K, 0.75K
FR-D710W-0.4K
Jumper
Terminal P/+
Brake resistor
FR-D720-11K, 15K
Terminal P/+
Jumper
*1
Brake resistor
—
Refer to page
10%
113
6%
*1
Terminal PR
Terminal PR
31
2
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