Mitsubishi Electric FREQROL Manuel d'instructions Page 62

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Connection of stand-alone option units Wiring
3 - 28
3.7.2 Connection of a dedicated external brake resistor FR-ABR and MRS
(FR-E720S-030 or more, FR-E740-016 or more)
Install a dedicated brake resistor (FR-ABR or MRS) outside when the motor is made to run by
the load, quick deceleration is required, etc. Connect a dedicated brake resistor (FR-ABR or
MRS) to terminal + and PR. (For the locations of terminal + and PR, refer to the terminal block
layout (section 3.3.2).)
Set parameters below (refer to section 6.9.2).
FR-E720S-030
Connected brake
resistor
Parameter setting
Pr. 30 „Regenerative
function selection“
Pr. 70 „Special regenerative brake duty“
MRS 0 (initial value)
FR-ABR
1
FR-E720S-110 or less
FR-E740-170 or less
10 (%)
FR-E740-230 or more 6 (%)
Tab. 3-14: Setting of parameter 30 and 70 when connecting an external brake resistor
E
CAUTION:
The brake resistor connected should only be the dedicated brake resistor.
Do not remove a jumper across terminal + and P1 except when connecting a DC
reactor.
The shape of jumper differs according to capacities.
Fig. 3-18:
Connection of a brake resistor to the terminals
+ and PR for the inverter FR-E720S-030
I002036E
Te r m i n a l +
Brake resistor
Te r m i n a l P R
Jumper
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