G&L MMC-A2, Hardware Manual

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Standalone MMC Control
68 MMC Hardware Manual G & L Motion Control Inc.
encoder input for each axis. The Axis I/O Port encoder
input accepts RS422 differential inputs. The encoder
signals should be quadrature type. All encoder wiring
between the MMC and the drive should be shielded
twisted pair as shown in
Figure 4-13 .
For more information on the Encoder input operation,
refer to
Section A.4 on page 175 of Appendix A .
Figure 4-13: Axis Port MMC Encoder Input
4.7.2 Aux I/O Port
The 44-pin HD female D-sub Auxiliary I/O Port connector (labeled
“AUX I/O” on the front of the Control) provides connection to an
NOTE
The power supply that powers the encoder must be referenced to
the power supply that powers the MMC. This is done by connecting
the “common” terminal of each supply back to Single Point
Ground. Failure to observe this precaution may result in sporadic
encoder operation and/or damage to the MMC.
A
A/
I
B
I/
B/
A
A/
B
B/
I
I/
MMC Axis I/O Connector
Drive
1
2
3
4
5
10
Shielded
Twisted
Pairs