Mitsubishi Electric FR-A800 Series Instruction Manual page 48

*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
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 The function of these terminals can be changed using the Input terminal function selection (Pr.178 to Pr.189). (Refer to
*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
*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-A820-00490(7.5K) or lower and FR-A840-00250(7.5K) or
lower).
*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
*9 Do not connect the DC power supply (under DC feeding mode) to terminal P3.
*10 The function of these terminals can be changed using the Output terminal function selection (Pr.195 or Pr.196). (Refer to
*11 The function of these terminals can be changed using the Output terminal function selection (Pr.190 to Pr.194). (Refer to
*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.
NOTE
• 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.
When drilling mounting holes in an enclosure etc., take caution not to allow chips and other foreign matter to enter the inverter.
• Set the switches of the voltage/current input selection switch assembly correctly. Incorrect setting may cause a fault, failure or
malfunction.
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page 826 to select the right DC reactor according to the applicable motor capacity.
page 421.)
page 521.)
page 97.)
page 473.)
page 473.)
2. INSTALLATION AND WIRING
2.4 Terminal connection diagrams
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