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©
National Instruments Corp.
11
NI 9512 Operating Instructions and Specifications
Signal Connections
Fig
u
re 4 shows the NI 9512 block diagram.
Figure 4.
NI 9512 Block Diagram
Phase A
± (0)
Phase B
± (0)
Index
± (0)
Home
Position
Capture
Position
Compare
Receiver
Circuitry
+5V Reg
+5V OUT
V
sup
COM
Output
Circuitry
Input
Circuitry
Step
±
Drive
Enable
Forward
Reverse
Microprocessor
Digital
Output
(0-1)
Direction
±
Buffer
Buffer
Buffer
Buffer
Digital
Input
(0-
3
)