Fuji Electric FRENIC-VG Series, User Manual

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6.14.6 Operation method
The encoder (1) and NTC thermistor (1) will be connected when the SEL terminal of the terminal block
and the 0-V external power supply terminal are open.
The encoder (2) and NTC thermistor (2) will be connected when the SEL terminal of the terminal block
and the 0-V external power supply terminal are closed.
Table 6.14.4
SEL terminal Encoder and NTC thermistor connected
OFF Encoder (1) and NTC thermistor (1)
ON Encoder (2) and NTC thermistor (2)
• No functions are incorporated to change over the motor power wires (U, V, and W). Use a magnetic contactor
(MC) to change them over externally.
• Never make connection changes while the motor during conduction.
Otherwise, the motor may go out of control or the inverter may malfunction.
• The PG signal common terminal (PGM) and thermistor common terminal (THC) are isolated from each other.
Do not short-circuit them with external wires.
• Do not use more than one unit to change over three or more motors. (The power supply to the PG is not
changed over. Therefore, the current may exceed the PG current capacity limit of the inverter.)
Otherwise, the inverter may be damaged.