National Instruments 7340 PCI Benutzerhandbuch

© National Instruments Corporation

Table 5-1 describes the signals on the motion I/O connector.

Table 5-1.  Motion I/O Signal Connections

Axis <1..4>

 

Dir (CCW)

Digital Ground

Output

Motor direction or 
counter-clockwise control

Axis <1..4> Step (CW)

Digital Ground

Output

Motor step or clockwise control

Axis <1..4> Encoder Phase A

Digital Ground

Input

Closed-loop only—phase A encoder 
input

Axis <1..4> Encoder Phase B

Digital Ground

Input

Closed-loop only—phase B encoder 
input

Axis<1..4> Encoder Index

Digital Ground

Input

Closed-loop only—index encoder 
input

Axis <1..4> Home Switch

Digital Ground

Input

Home switch

Axis <1..4> Forward Limit Switch

Digital Ground

Input

Forward/clockwise limit switch

Axis <1..4> Reverse Limit Switch

Digital Ground

Input

Reverse/counter-clockwise limit 
switch

Axis <1..4> Inhibit

Digital Ground

Output

Drive inhibit

Trigger <1..4>

Digital Ground

Input

High-speed position capture trigger 
input <1..4>

Breakpoint <1..4>

Digital Ground

Output

Breakpoint output <1..4>

Host +5 V

Digital Ground

Output

+5 V—host computer +5 V supply

Analog Input Ground

—

—

Reference for analog inputs

Analog Input <1..4>

Analog Input Ground

Input

12-bit analog input

Analog Output <1..4>

Analog Output Ground

Output

16-bit analog output

Analog Output Ground

—

—

Reference for analog outputs 

Shutdown

Digital Ground

Input

Controlled device shutdown

Analog Reference (output)

Analog Input Ground

Output

+7.5 V—analog reference level

Digital Ground

—

—

Reference for digital I/O