MID-7654/7652Servo Power Motor Drive User Guide 22 ni.com
7. Ensurethat the rear guard is held securely in place before reconnecting
your MID-7654/7652 to a power outlet.
Encoder TerminalBlocks
Forquadrature incremental encoder signals, each MID-7654/7652 axis has
aseparate 8-position removable screw terminal block. Where applicable,
the MID-7654/7652 accepts two types of encoder signal inputs:
single-ended (TTL)or differential line driver. You can accommodate
open-collector output encoders by using 2.2 kΩpullup resistors to
+5 VDC.
Figure 12 showsthe typical en coder wiring pin assignment for
single-ended signal input.
Figure 12. TypicalSingle-Ended Encoder Wiring Pin Assignment
Figure 13 showsthe typicalencoder wiring pin assignmentfor differential
line driversignal inputs.
Figure13. Typical Differential Line Driver Encoder Wiring Pin Assignment
If the encoder cable length is greater than 10 ft, use encoders with line
driveroutputs for your applications. Power for a +5 V encoder—generated
bya power supply inside the MID-7654/765 2—isavailable on pin 7.
1
2
3
4
5
6
7
8
EncoderA
EncoderB
EncoderIndex
+5V
DigitalGround
1
2
3
4
5
6
7
8
EncoderA
EncoderA
EncoderB
EncoderB
EncoderIndex
EncoderIndex
+5V
DigitalGround