Electrical Installation
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possible (within 20 m). In scenarios where analog signals suffer from severe external
interference, install a filter capacitor or a ferrite core on the analog signal source side.
● Use shielded cables together with a shield grounding bracket (optional) to achieve
all‑round grounding of the cable shield can.
● Minimize the length of the lead wire of the shield. Fasten the lead wire to the
standard grounding copper busbar of the AC drive by using screws. The following
figure shows the grounding.
Figure 7‑45 Grounding the shield of AI1
Requirements on wiring of encoder signal cables
Before inserting a PG card, remove the screws shown in the enlarged area in the
following figure, align the PG card with the three fixing posts (to the upper left of the
enlarged area), and fix the PG card with M3 x 8 screws.
The entire AC drive is grounded in structure. When wiring the encoder after PG card
installation, connect the encoder signal cable shield to the PE terminal of the PG card
to complete shield grounding. Wire the encoder in accordance with the following
requirements:
1. During on‑site installation and commissioning, route the encoder cable and power
cable in different cable ducts. Failure to comply may result in encoder interference.
2. Use shielded twisted pair cables. For differential encoders, connect the shield of
the twisted pair cable to the grounding (PE) terminal of the AC drive.
3. In some scenarios with large‑scale equipment, where the AC driver is far away from
the motor (the motor cable may be as long as 10 m), the grounding impedance of
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