Inovance MD500 User Manual

Appendix A
-
141
-
Shield
26C31
26C32
5V
COM
A+,B+,Z+
A-,B-,Z-
COM
Frequency
dividing output
PG card
VCC
0V
A+,B+,Z+
A-,B-,Z-
A+,B+,Z+
A-
,B-
,Z-
PE
Twisted
pair
Encoder
Figure A-8 Port circuit of MD38PG6 and MD38PG6D
A.5.7 Shield Grounding of PG Card
On prerequisite that AC drive parameters are set properly, if PG card feedback speed or position is instable, it
indicates that the PG card suffers electromagnetic interference. In this case, connect shield of encoder signal
lines to PE of the AC drive to restrain interference.
Connect inside
of ground bar
to PE
After installation of the PG card is done, PE of PG card is auto-connected to Ground signal with AC drive.
When connecting the encoder, connect shield of signal lines to PE of PG card to complete the shield ground-
ing.
To install the PG card, remove the screw in amplied position and align mounting holes of PG card to the three
xing pins and x the PG card with the prepared M3 x 8 screws.
A.5.8 EMC Guidance
1. Do not bundle the encoder cable and power cables together. Failure to comply will result in encoder inter-
ference.
2. Motor shell must be connected to PE of the AC drive. Meanwhile, connect the grounding cable of the motor
to the motor shell reliably. Failure to comply will result in poor grounding effect.
3. An STP cable is suggested. For differential encoders, perform cable connection based on differential pairs
properly and connect shield to PE of the AC drive.
4. For large equipment applications where the AC drive is far away from the motor and the motor cable is
longer than 10 m, grounding effect is not good due to inuence of cable inductance. In this case, encoder
shield need not be connected to PE of the AC drive.
5. Indicators on the PG card indicate interference on MD38PGMD. For details, refer to description on indica-
tors above.

Inovance MD500 Specifications

General

Brand	Inovance
Model	MD500
Category	Controller
Language	English