Chapter 5
Signal Connections
©
National Instruments Corporation
5-3
7344/7334 Hardware User Manual
Table 5-1 describes the signals on the motion I/O connector.
Table 5-1.
Motion I/O Signal Connections
Signal Name
Reference
Direction
Description
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 co5 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 (7344 only)
Analog Output Ground
—
—
Reference for analog outputs
(7344 only)
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
