National Instruments 7334, 7344 Table5-1 describes the signals on the motion I/O connector.

Chapter5 SignalConnections
©NationalInstruments Corporation 5-3 7344/7334Hardware User Manual
Table5-1 describes the signals on the motion I/O connector.
Table5-1. MotionI/O Signal Connections
SignalName Reference Direction Description
Axis<1..4> Dir(CCW) DigitalGround Output Motordirection or
counter-clockwisecontrol
Axis<1..4> Step (CW) DigitalGround Output Motorstep or clockwise control
Axis<1..4> Encoder Phase A DigitalGround Input Closed-looponly—phaseAencoder
input
Axis<1..4> Encoder Phase B DigitalGround Input Closed-looponly—phaseB encoder
input
Axis<1..4>Encoder Index DigitalGround Input Closed-looponly—indexencoder
input
Axis<1..4> Home Switch Digital Ground Input Home switch
Axis<1..4> Forward Limit Switch DigitalGround Input Forward/clockwiselimitswitch
Axis<1..4> Reverse Limit Switch Digital Ground Input Reverse/counter-clockwise limit
switch
Axis<1..4> Inhibit DigitalGround Output Driveinhibit
Trigger<1..4> DigitalGround Input High-speedpositioncapture trigger
input<1..4>
Breakpoint<1..4> Digital Ground Output Breakpointoutp ut <1..4>
Host+5 V DigitalGround Output +5V—host computer +5 V supply
AnalogInput Ground — — Referencefor analog inputs
AnalogInput <1..4> AnalogInput Ground Input 12-bitanalog input
AnalogOutput <1..4> Analog Output Ground Output 16-bitanalogoutput (7344 only)
AnalogOutput Ground — — Referencefor analog outputs
(7344only)
Shutdown DigitalGround Input Controlleddeviceshutdown
AnalogReference (output) AnalogInput Ground Output +7.5V—analog reference level
DigitalGround — — Reference for digital I/O