Electrical Installation
‑171‑
Figure 8‑52 Grounding the shield of the analog input cable
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 pillars (left part 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 drain wire of the shield of the encoder signal cable to the PE
terminal of the PG card to complete shield grounding of the signal cable.
Requirements for connecting the encoder cable:
● During on‑site installation and commissioning, route the encoder cables and
power cables through different routes. Never bundle the encoder cables and
power cables together to prevent interference to the encoder.
● It is recommended to use shielded twisted pair cables. For differential encoders,
connect the twisted pair cables based on the differential pairs, and connect the
shield to the ground terminal (PE terminal) of the AC drive.
● For some large‑scale equipment, the length of the motor cable between the drive
and the motor is long (>10 m). The grounding resistor of the encoder cable shield
will increase due to the effect of cable parasitic inductance. In this case, the
encoder shield does not need to be connected to the ground terminal (PE) of the
drive.
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