Connection of stand-alone option units Wiring
3 - 34
3.7.2 Connection of a dedicated external brake resistor FR-ABR
(FR-E720S-030SC or more, FR-E740-016SC or more)
Install a dedicated brake resistor (FR-ABR) outside when the motor is made to run by the load, quick
deceleration is required, etc. Connect a dedicated brake resistor (FR-ABR) to terminal + and PR (resp.
P/+ and PR). (For the locations of terminal + and PR (resp. P/+ and PR), refer to the terminal block layout
(section 3.3.2).)
Set parameters below (refer to section 6.9.2).
FR-E720S-030SC
Connected Brake
Resistor
Parameter Setting
Pr. 30 "Regenerative
function selection"
Pr. 70 "Special regenerative brake duty"
FR-ABR
1
FR-E720S-110SC or less
FR-E740-170SC or less
10 (%)
FR-E740-230SC or more 6 (%)
Tab. 3-17: Setting of parameter 30 and 70 when connecting an external brake resistor
b
CAUTION:
ā The brake resistor connected should only be the dedicated brake resistor.
ā Do not remove a jumper across terminal + and P1 (resp. P/+ and P1) except when connecting
a DC reactor.
ā The shape of jumper differs according to capacities.
Fig. 3-24:
Connection of a brake resistor to the terminals +
and PR for the inverter FR-E720S-030SC
I002036E
Terminal +
Brake resistor
Terminal PR
Jumper
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