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MID-7654/7652 Servo Power Motor Drive User Guide 24 ni.com
Figure 15. Shielded Twisted Pairs
Note
Using an unshielded cable may produce noise, whichcan corrupt theencoder signals
and cause lost counts, reduced accuracy, or other erroneous encoder and controller
operation.
Limit Switch Terminal Blocks
For end-of-travel limit, home, inhibit input, and inhibit output connections,
MID-7654/7652 axes have a separate, 6-position removablescrew terminal
connector block. Figure 16 shows the limit switch terminal block pin
assignments.
Figure 16. Limit Switch Terminal Block Pin Assignment
(Passive Limit Switch Connection Example)
You can configure the inhibit output signal to be asserted low or asserted
high from the MID-7654/7652 when an axis is inhibited. This signal can be
useful for actuating mechanical brakes or for monitoring an axis status.
Refer to the Amplifier Inhibit LEDs section of this guide for a description
of the conditions that will cause an axis to be inhibited.
Shield
+5 V
Encoder Index
Encoder Index
Encoder B
Encoder B
Encoder A
Drain
Encoder A
Digital
Ground
1
6
2
3
4
5
Forward Limit
Home Input
Inhibit Input
Digital Ground
Reverse Limit
Inhibit Output