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Connection of stand-alone option unit
2
WIRING
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)
(FR-D720-025 or more, FR-D740-012 or more, FR-D720S-025 or more)
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.
∗1 Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor.
∗2 The shape of jumper differs according to capacities.
Connected Brake
Resistor
Pr. 30 Regenerative function selection
Setting
Pr. 70 Special regenerative brake duty Setting
MRS type, MYS type 0 (initial value) —
MYS type (used at 100%
torque/6%ED)
16%
Refer to page 110
FR-ABR 1 10%
NOTE
The brake resistor connected should only be the dedicated brake resistor.
FR-D720-070 to 165
FR-D740-012 to 080
FR-D720S-070, 100
FR-D720-238, 318
FR-D740-120, 160
Connect the brake resistor across terminals P/+ and PR.
Connect the brake resistor across terminals P/+ and PR.
FR-D720-025, 042
FR-D720S-025, 042
Connect the brake resistor across terminals P/+ and PR.
Terminal P/+
Brake resistor
Jumper
*1
Terminal PR
Terminal PR
Brake resistor
Jumper
*1, *2
Terminal P/+
Terminal PR
Brake resistor
Jumper
*1
Terminal P/+