NI C Series Getting Started

NI-9361 Front End Control
The NI-9361 has 8 inputs that support both single-ended and dierential modes.
You can configure each of the input signals as the input to any of the 8 counters on
the module. The following figure shows the circuitry of one of the digital inputs.
Each digital input is similar.
Figure 7. Digital Input Circuitry
DI +
(0 - 7)
I/O Protection
+
DI –
(0 - 7)
(SE : NC)
I/O Protection
Programmable
Digital Filter
Counter
(0 - 7)
Input
Selection
Mux
–
+5 V
Comparator
Single-Ended/
Differential Mode
Selection
Per Channel
Pull-up
Enable/Disable
Selection
Per Channel
Module Wide
Single-Ended
Threshold
Control
I/O Protection
The voltage input level and the current input level of the digital signals are listed in
the specifications of your device. The I/O protection circuitry protects the module in
events such as overvoltage, overcurrent, and ESD. Refer to the NI-9361
Specifications for more information about the protection level supported.
Input Mode
You can configure the digital inputs to any of the following modes:
■
Single ended
■
Single ended with pull up
■
Dierential
Note In single-ended and single-ended with pull-up modes, you must
leave the corresponding DI- terminal open and connect the input signal to
© National Instruments
11
NI-9361 Getting Started

NI C Series Specifications

General

Brand	NI
Model	C Series
Category	Control Unit
Language	English