6-50
6.3.4.2 Open collector output type
Choose the OPC-VG1-PMPGo when using an open collector output type motor encoder. The following
figure illustrates wiring connections used when detecting magnetic pole positions using 3-phase U, V, and
W signals (GRK-type ES motors).
Since open collector connections offer low resistance to noise, use as short a wiring run as possible and
connect zero-phase ferrite rings on the primary and secondary sides of the inverter.
Figure 6.3.6
Precautions
(1) Read over the motor specifications carefully before connecting the power supply to the motor
encoder.
(2) The synchronous motor drive PG interface card provides a 5 V power supply. The inverter's encoder
power supply can also be used to provide a 15 V or 12 V power source.
(3) The OPC-VG1-PGo option can also be used when detecting magnetic pole positions with the
Z-phase alone (available soon).
(4) As shown above, when connecting a GRK-type ES motor to the FRENIC-VG, connect the W-phase
wire to [F1] and the V-phase wire, to [F2]. Be careful with the wiring.
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