National Instruments nuDrive 2CF-001, Руководство пользователя

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© National Instruments Corporation 9 nuDrive Accessory User Guide
Figure 3. Typical Single-Ended Encoder Wiring Pin Assignment
Figure 4. Typical Differential Line Driver Encoder Wiring Pin Assignment
If the encoder cable length is greater than 15 ft, you should use encoders
with line driver outputs for your applications. Power for a +5 V encoder is
available on pin 7, generated by a power supply inside the nuDrive.
Note If you require other encoder power values, reference an external power supply to the
Common (ground) signal on the 8-pin encoder terminal block.
nuDrives have differential inputs for Phase A, Phase B, and Index signals.
You can easily accommodate encoders with various phase relationships by
swapping the signals and/or connecting them to the inverting inputs as
specific applications require. The index pulse must occur when both
Phase A and Phase B signals are logic low, as shown in Figure 5. If the
Index pulse is inverted, try reversing the Index and Index signals on
differential encoders or wiring to the Index input with single-ended wiring.
1
2
3
4
5
6
7
8
Phase A
Phase B
Index
+5 V
Common
1
2
3
4
5
6
7
8 Phase A
Phase A
Phase B
Phase B
Index
Index
+5 V
Common