National Instruments NI 9403E User manual

OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9403E
32-Channel, TTL Digital Input/Output Module

NI 9403E Operating Instructions and Specifications 2 ni.com
This document describes how to use the National
Instruments 9403E and includes dimensions, pin assignments, and
specifications for the NI 9403E. Visit ni.com/info and enter
rdsoftwareversion to determine which software you need for
the modules you are using. For information about installing,
configuring, and programming the system, refer to the system
documentation. Visit ni.com/info and enter cseriesdoc for
information about C Series documentation.
Caution National Instruments makes no electromagnetic
compatibility (EMC) or CE marking compliance claims
for the NI 9403E. The end-product supplier is responsible
for conformity to any and all compliance requirements.
Caution The NI 9403E must be installed inside a suitable
enclosure prior to use. Hazardous voltages may be present.

© National Instruments Corp. 3 NI 9403E Operating Instructions and Specifications
NI 9403E Dimensions
The following figure shows the dimensions of the NI 9403E.
Figure 1. NI 9403E Dimensions in Millimeters (Inches)
73.4 (2.89)
0.0 (0.00)
26.7 (1.05)
58.4 (2.30)
66.0 (2.60)
0.0 (0.00)

NI 9403E Operating Instructions and Specifications 4 ni.com
Connecting the NI 9403E
The NI 9403E has a 37-pin DSUB connector that provides
connections for the 32 digital input/output channels.
Figure 2. NI 9403E Pin Assignments
DIO16
DIO17
DIO18
DIO19
DIO20
DIO21
DIO22
DIO23
COM
COM
DIO24
DIO25
DIO26
DIO27
DIO28
DIO29
DIO30
DIO31
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
DIO6
DIO7
COM
COM
DIO8
DIO9
DIO10
DIO11
DIO12
DIO13
DIO14
DIO15
RSVD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

© National Instruments Corp. 5 NI 9403E Operating Instructions and Specifications
Each channel has a DIO pin to which you can connect a digital
input or output device. The 32 DIO channels are internally
referenced to COM, so you can use any of the four COM lines as a
reference for the external signal.
You can independently configure each DIO channel in software for
input or output. The DIO channels have Schmitt trigger inputs and
are compatible with 5 V TTL logic devices. Each input channel
has hysteresis for improved performance with noisy and
non-monotonic input signals. Each channel also has a pull-down
resistor and includes overvoltage, overcurrent, and short-circuit
protection. Refer to the Specifications section for more information
about input thresholds and overvoltage protection. Refer to the
Overcurrent/Short-Circuit Protection section for more
information about overcurrent and short-circuit protection.

NI 9403E Operating Instructions and Specifications 6 ni.com
Refer to Figure 3 for an illustration of several types of digital
devices connected to the NI 9403E.
Figure 3. Connecting Digital Devices to the NI 9403E
TTL Signal
+5 V
+5 V
LED
DIO0 as Input
DIO1 as Input
COM
DIO2 as Output
NI 9403E
Dev 3
Dev 2
Dev 1

© National Instruments Corp. 7 NI 9403E Operating Instructions and Specifications
Overcurrent/Short-Circuit Protection
The overcurrent protection allows only a specified amount of
current through the output channels to protect the NI 9403E from
short circuits. If the NI 9403E goes into an overcurrent state, the
module sets all the DIO channels to high impedance for
approximately 280 milliseconds. When the channels are in this
state, the NI 9403E can accept new line direction configuration and
output state data but cannot pass valid input data to the software.
After the protection period, the NI 9403E automatically recovers to
the latest direction configuration and output state. If the
overcurrent condition still exists, the module again sets the
channels to high impedance. This cycle continues until the
overcurrent condition is removed. Refer to the Specifications
section for more information about the maximum output current.
Sleep Mode
This module supports a low-power sleep mode. Support for sleep
mode at the system level depends on the chassis that the module is
plugged into. Refer to the chassis manual for information about
support for sleep mode. If the chassis supports sleep mode, refer to
the software help for information about enabling sleep mode. Visit

NI 9403E Operating Instructions and Specifications 8 ni.com
ni.com/info and enter cseriesdoc for information about
C Series documentation.
Typically, when a system is in sleep mode, you cannot
communicate with the modules. In sleep mode, the system
consumes minimal power and may dissipate less heat than it does
in normal mode. Refer to the Specifications section for more
information about power consumption and thermal dissipation.
Specifications
The following specifications are typical for the range –40 to 85 °C
unless otherwise noted. All voltages are relative to COM unless
otherwise noted.
Input/Output Characteristics
Number of channels .......................... 32 DIO channels
Input/output type............................... TTL, single-ended
Default power-on line direction........ Input

© National Instruments Corp. 9 NI 9403E Operating Instructions and Specifications
Digital logic levels
Input
Voltage ................................. – 0.25 to 5.25 V
High, VIH.............................. 2.2 V min
Low, VIL ............................... 0.8 V max
Hysteresis, VH...................... 0.2 V min
Output
High, VOH............................. 5.2 V max
Sourcing 100 μA ........... 4.75 V min
Sourcing 2 mA............... 4.4 V min
Low, VOL
Sinking 100 μA ............. 0.1 V max
Sinking 2 mA................. 0.26 V max
Input current (0 V ≤Vin ≤4.5 V)...... ±250 μA max
Module output current1..................... 64 mA max
Input capacitance .............................. 30 pF
1 Module output current is the maximum guaranteed current that the module can drive
from all the I/O lines without going into an overcurrent state.

NI 9403E Operating Instructions and Specifications 10 ni.com
Timing
Input
Setup time1........................... 10 ns min
Hold time2............................ 60 ns min
Output
Propagation delay3............... 330 ns max
Channel-to-channel skew4... 265 ns max
1 Setup time is the amount of time input signals must be stable before reading from the
module.
2 Hold time is the amount of time input signals must be stable after initiating a read
from the module.
3 Propagation delay is the amount of time after writing to the module that the output
signals become valid.
4 Channel-to-channel skew is the amount of time between the first output signal
updating and the last output signal updating.