Mitsubishi Electric FR-A800 Series Instruction Manual page 99

1) Remove the screws in terminals PR
and PX and remove the jumper.
FR-A840-00310(11K), FR-A840-00380(15K)
Connect the brake resistor
across terminals P/+ and PR.
Brake resistor
Connect the brake resistor
across terminals P3 and PR.
Terminal P3
Brake resistor
*1 Do not remove the jumper across terminals P/+ and P1 except when connecting a DC reactor (FR-HEL).
NOTE
• For the FR-A820-00490(7.5K) or lower and the FR-A840-00250(7.5K) or lower, the jumper across terminals PR and PX must
be disconnected before connecting the dedicated brake resistor. Doing so may damage the inverter.
• A brake resistor cannot be used with options such as brake units, high power factor converters, and power regeneration
converters.
 Connection of the dedicated external brake resistor (FR-ABR)
The FR-ABR can be applied to the FR-A820-01250(22K) or lower and the FR-A840-00620(22K) or lower.
Set parameters as follows:
• Pr.30 Regenerative function selection = "1"
98
2. INSTALLATION AND WIRING
2.10 Connection of stand-alone option units
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FR-A820-00340(5.5K), FR-A820-00490(7.5K), FR-A840-00170(5.5K), FR-A840-00250(7.5K)
FR-A820-00630(11K),
Jumper∗1
Terminal P/+
Terminal PR
FR-A840-00770(30K)
Terminal PR
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2) Connect the brake resistor across
terminals P/+ and PR. (The jumper
should remain disconnected.)
Jumper
Terminal P/+
Terminal PR
Terminal PX
Brake resistor
FR-A820-00770(15K) to FR-A820-01250(22K),
FR-A840-00470(18.5K), FR-A840-00620(22K)
Connect the brake resistor
across terminals P3 and PR.
Brake resistor
FR-A840-00930(37K) to FR-A840-01800(55K)
Connect the brake resistor
across terminals P3 and PR.
Brake resistor
Terminal PR
Terminal P3
Terminal PR
Terminal P3
Terminal PR