*1 For the FR-A820-03800(75K) or higher, the FR-A840-02160(75K) or higher, or whenever a 75 kW or higher motor is used, always connect a DC reactor (FR-HEL), which is available as an option. Refer to page 846 to select the right DC reactor according to the applicable motor capacity. When a DC reactor is connected to the FR-A820-03160(55K) or lower or the FR-A840-01800(55K) or lower, if a jumper is installed across terminals P1 and P/+, remove the jumper before installing the DC reactor.
(The jumper is not installed for the FR-A820-03800(75K) or higher and the FR-A840-02160(75K) or higher.) *2 When using separate power supply for the control circuit, remove the jumper between R1/L11 and S1/L21. *3 Terminal functions can be changed using the Input terminal function selection (Pr.178 to Pr.189) . (Refer to page 539 .) *4 Terminal JOG is also used as a pulse train input terminal. Use Pr.291 to choose JOG or pulse. *5 Terminal input specifications can be changed by analog input specification switchover ( Pr.73, Pr.267 ). To input a voltage, set the corresponding switch of the voltage/current input selection switch assembly to the OFF position.
To input a current, set the switch to the ON position. Terminals 10 and 2 are also used as a PTC input terminal ( Pr.561 ). (Refer to page 427 .) *6 It is recommended to use 2 W 1 kΩ when the frequency setting signal is changed frequently. *7 Remove the jumper between terminals PR and PX to connect the brake resistor (FR-A820-00046(0.4K) to 00490(7.5K) and FR-A840- 00023(0.4K) to 00250(7.5K)). *8 Connect a brake resistor across terminals P/+ (P3) and PR. (Terminal PR is equipped in the FR-A820-00046(0.4K) to 01250(22K), and FR-A840- 00023(0.4K) to 01800(55K).) Install a thermal relay to prevent overheating and damage of brake resistors.
(Refer to page 98 .) *9 Connect only a brake resistor to terminal P3. *10 Terminal functions can be changed using the Output terminal function selection (Pr.195, Pr.196) . (Refer to page 490 .) *11 Terminal functions can be changed using the Output terminal function selection (Pr.190 to Pr.194) . (Refer to page 490 .) *12 Terminal FM can be used to output pulse trains as open collector output by setting Pr.291 . *13 Not required when calibrating the scale with the operation panel. To prevent a malfunction due to noise, keep the signal cables 10 cm or more away from the power cables. Also, keep the cables of the main circuit for input and output separated.
After wiring, wire offcuts must not be left in the inverter. Wire offcuts can cause a fault, failure or malfunction. Always keep the inverter clean. Set the switches of the voltage/current input selection switch assembly correctly. Incorrect setting may cause a fault, failure or When drilling mounting holes in an enclosure etc., take caution not to allow chips and other foreign matter to enter the inverter. malfunction. 48 2. INSTALLATION AND WIRING 2.4 Terminal connection diagrams NOTE