Digital Input Characteristics

The AL-1010 supports a variety of ways to configure a system that can measure the state of a digital source from a device under test. The following sections outline what sources are available and how to configre the module to support the desired configuration.

	Supported
Module DI
Ch 1..12	Yes
External DI
Ch 1..12	Yes

Input latency	~50 ns
Pull up/down configuration	None by default. See External Bus Characteristics for more details.
Acquisition details
Acquisition Type	Single-Point
Timing Type	On Demand
Update Rate [2]	Determined by system configuration and the NI-SLSC driver
Threshold characteristics
Threshold range	-30 V - 30 V
Threshold step size	~2.93 mV/div
PWM input characteristics
Period step size	20 ns
Maximum period duration	~5.36 seconds
Active time step size	20 ns

[2]

The application update rate does not affect the accuracy of the device, only how often the values are available.

SLSC Configuration Properties

Name	Resource Type	DataType	Description	Valid Values
AL.THRESHOLD	Physical Channel	Double	Threshold value for comparisons	[-30.0..30.0]

SLSC Interface Properties

Name	Resource Type	DataType	Description	Valid Values
Discrete
AL.DI	Physical Channel	Bool	Current state of the digital input	True, False