Connection Of Stand-Alone Option Units - Mitsubishi Electric FR-A500 Instruction Manual

2.2.5

Connection of stand-alone option units

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.
(1) Connection of the dedicated external brake resistor (FR-ABR)
The built-in brake resistor is connected across terminals P <+> and PR. Fit the external dedicated brake
resistor (FR-ABR) instead when the built-in brake resistor does not have enough thermal capability for high-
duty operation. Remove the jumper from across terminals PR-PX and connect the dedicated brake resistor
(FR-ABR) across terminals P-PR <+ -PR>.
Set "1" in Pr. 30 "regenerative function selection" and "10%" in Pr. 70 "special regenerative brake duty."
(Refer to page 85)
(For the positions of terminals P and PR, refer to the terminal block arrangement (page 17 and 18).)
Note: 1. The brake resistor connected should only be the dedicated brake resistor.
2. The jumper across terminals PR-PX (7.5K or less) must be disconnected before connecting the
dedicated brake resistor. A failure to do so may damage the inverter.
• Model ..............FR-A520-0.4K to 3.7K-NA, FR-A540-0.4K to 3.7K-NA/-EC
1) Remove the screws in terminals PR and PX and remove the jumper.
2) Connect the brake resistor across terminals P-PR <+ -PR>.
(The jumper should remain disconnected.)
Removal of jumper
Terminal PR
Terminal PX
• Model ..............FR-A520-5.5K, 7.5K-NA, FR-A540-5.5K, 7.5K-NA/-EC
1) Remove the screws in terminals PR and PX and remove the jumper.
2) Connect the brake resistor across terminals P-PR <+ -PR>.
(The jumper should remain disconnected.)
Removal of jumper
Terminal PR
Jumper
FR-A520-0.4K, 0.75K-NA
Terminal P
Jumper
FR-A520-5.5K, 7.5K-NA
FR-A540-5.5K, 7.5K-NA/-EC
Terminal P/+
Terminal PX
INSTALLATION AND WIRING
Terminal PR
Terminal PR
28
FR-A520-1.5K to 3.7K-NA/-EC
FR-A540-0.4K to 3.7K-NA/-EC
Terminal P
Terminal PR