2.10 Connection of stand-alone option units Incorrect connection will cause inverter damage or accident. Connect and operate the option unit carefully in accordance with The inverter accepts a variety of stand-alone option units as required. the Instruction Manual of the corresponding option unit. 2.10.1 Connection of the brake resistor When an inverter-driven motor is driven by a load or requires rapid deceleration, install an external brake resistor. Connect the brake resistor to terminals P/+(P3) and PR.
(For the locations of terminal P/+(P3) and PR, refer to the terminal block layout ( page 56 ).) For the FR-A820-00490(7.5K) or lower and the FR-A840-00250(7.5K) or lower, the plug-in brake resistor is connected to terminals P/+ and PX. When the plug-in brake resistor does not have enough thermal capability for high-duty operation, install an external brake resistor. At this time, remove the jumper across terminals PR and PX and connect the brake resistor to terminals P/+ and PR. (For the locations of terminals P/+ and PR, refer to the terminal block layout ( page 56 ).) Removing jumpers across terminals PR and PX disables the plug-in brake resistor (power is not supplied).
The plug-in brake resistor can be left connected to the inverter, and so is the plug-in brake resistor's lead wire connected to the terminal. 98 2. INSTALLATION AND WIRING 2.10 Connection of stand-alone option units FR-A820-00046(0.4K), FR-A820-00077(0.75K) FR-A820-00105(1.5K) to FR-A820-00250(3.7K) FR-A840-00023(0.4K) to FR-A840-00126(3.7K) 1) Remove the screws in terminals PR and PX and remove the jumper. Jumper Terminal PR Terminal PX 2) Connect the brake resistor across terminals P/+ and PR. Terminal P/+ (The jumper should remain disconnected.) Terminal PR Brake resistor 1) Remove the screws in terminals PR and PX and remove the jumper.
Jumper Terminal PR Terminal PX 2) Connect the brake resistor across terminals P/+ and Terminal P/+ PR. (The jumper should Terminal PR remain disconnected.) Brake resistor