Mitsubishi Electric FR-D720S SC EC, Instruction Manual

Page: 70 / 512

Connection of stand-alone option units Wiring
3 - 34
3.6.2 Connection of a dedicated external brake resistor FR-ABR
(FR-D720S-025SC or more, FR-D740-012SC 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
P/+ and PR. (For the locations of terminal P/+ and PR, refer to the terminal block layout
(section 3.3.2).)
Set parameters below (refer to section 6.8.2).
FR-D720S-025SC and 042SC
Connected Brake
Resistor
Parameter Setting
Pr. 30 „Regenerative
function selection“
Pr. 70 „Special regenerative brake duty“
FR-ABR 1 10 (%)
Tab. 3-18: Setting of parameter 30 and 70 when connecting an external brake resistor
b
CAUTION:
●
The brake resistor connected should only be the dedicated brake resistor FR-ABR.
●
Do not remove a jumper across te and P1, resp. P/+ and P1, except when
connecting a DC reactor.
●
The shape of jumper differs according to capacities.
Fig. 3-24:
Connection of a brake resistor to the terminals
+ and PR for the inverters FR-D720S-025SC
and FR-D720S-042SC
I002036E
Te
Brake resistor
Terminal PR
Jumper