National Instruments NI 9375 User manual

NI-9375 Getting
Started
2022-07-06

Contents
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
NI 9375 with Spring Terminal (Black Connector) Safety Voltages. . . . . . . . . . . . . 3
Safety Guidelines for Hazardous Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Special Conditions for Marine Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Preparing the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
NI 9375 Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sourcing-Output Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connecting Digital Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Protecting the Digital Outputs from Flyback Voltages. . . . . . . . . . . . . . . . . . . . . . . 8
Connecting to a Spring-Terminal Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
High-Vibration Application Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
I/O Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Where to Go Next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
NI Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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NI-9375 Getting Started

Overview
This document explains how to connect to the NI 9375. In this document, the
NI 9375 with spring terminal and the NI 9375 with DSUB are referred to inclusively as
the NI 9375.
Note Before you begin, read the NI 9375 Safety, Environmental, and
Regulatory Information document on ni.com/manuals and complete the
soware and hardware installation procedures in your chassis
documentation.
Note The guidelines in this document are specific to the NI 9375. The
other components in the system might not meet the same safety ratings.
Refer to the documentation for each component in the system to
determine the safety and EMC ratings for the entire system.
Safety Guidelines
Caution Observe all instructions and cautions in the user documentation.
Using the product in a manner not specified can damage the product and
compromise the built-in safety protection.
Attention Suivez toutes les instructions et respectez toutes les mises
en garde de la documentation d'utilisation. L'utilisation du produit de
toute autre façon que celle spécifiée risque de l'endommager et de
compromettre la protection de sécurité intégrée.
NI 9375 with Spring Terminal (Black Connector) Safety Voltages
Connect only voltages that are within the following limits.
Channel-to-COM or Vsup-to-COM 30 V DC maximum
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NI-9375 Getting Started

Isolation
DI bank-to-DO bank 60 V DC maximum
Channel-to-Channel No isolation between channels
Channel-to-earth ground
Continuous 60 V DC, Measurement Category I
Withstand 1,000 V RMS, verified by a 5 s dielectric withstand test
Safety Guidelines for Hazardous Locations
The NI 9375 is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous
locations; Class I, Zone 2, AEx nA IIC T4 Gc and Ex nA IIC T4 Gc hazardous locations;
and nonhazardous locations only. Follow these guidelines if you are installing the
NI 9375 in a potentially explosive environment. Not following these guidelines may
result in serious injury or death.
Caution Do not disconnect I/O-side wires or connectors unless power has
been switched o or the area is known to be nonhazardous.
Caution Do not remove modules unless power has been switched o or
the area is known to be nonhazardous.
Caution Substitution of components may impair suitability for Class I,
Division 2, or Zone 2.
Caution The system must be installed in an enclosure certified for the
intended hazardous (classified) location, having a tool secured cover/door,
where a minimum protection of at least IP54 is provided.
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NI-9375 Getting Started

Special Conditions for Hazardous Locations Use in Europe and
Internationally
The NI 9375 has been evaluated as Ex nA IIC T4 Gc equipment under
DEMKO 07ATEX 0626664X and is IECEx UL 14.0089X certified. Each NI 9375 is marked
II 3G and is suitable for use in Zone 2 hazardous locations, in ambient
temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9375 in Gas Group IIC
hazardous locations, you must use the device in an NI chassis that has been
evaluated as Ex nC IIC T4, Ex IIC T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.
Caution Transient protection shall be provided that is set at a level not
exceeding 140% of the peak rated voltage value of 85 V at the supply
terminals to the equipment.
Caution The system shall only be used in an area of not more than
Pollution Degree 2, as defined in IEC/EN 60664-1.
Caution The system shall be mounted in an ATEX/IECEx-certified
enclosure with a minimum ingress protection rating of at least IP54 as
defined in IEC/EN 60079-15.
Caution The enclosure must have a door or cover accessible only by the
use of a tool.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory requirements and limits
for electromagnetic compatibility (EMC) stated in the product specifications. These
requirements and limits provide reasonable protection against harmful interference
when the product is operated in the intended operational electromagnetic
environment.
This product is intended for use in industrial locations. However, harmful
interference may occur in some installations, when the product is connected to a
peripheral device or test object, or if the product is used in residential or
© National Instruments 5
NI-9375 Getting Started

commercial areas. To minimize interference with radio and television reception and
prevent unacceptable performance degradation, install and use this product in strict
accordance with the instructions in the product documentation.
Furthermore, any changes or modifications to the product not expressly approved
by National Instruments could void your authority to operate it under your local
regulatory rules.
Special Conditions for Marine Applications
Some products are approved for marine (shipboard) applications. To verify marine
approval certification for a product, visit ni.com/product-certifications, search by
model number, and click the appropriate link.
Notice In order to meet the EMC requirements for marine applications,
install the product in a shielded enclosure with shielded and/or filtered
power and input/output ports. In addition, take precautions when
designing, selecting, and installing measurement probes and cables to
ensure that the desired EMC performance is attained.
Preparing the Environment
Ensure that the environment in which you are using the NI 9375 meets the following
specifications.
Operating temperature (IEC 60068-2-1, IEC 60068-2-2) -40 °C to 70 °C
Operating humidity (IEC 60068-2-78) 10% RH to 90% RH, noncondensing
Pollution Degree 2
Maximum altitude 2,000 m
Indoor use only.
Note Refer to the device datasheet on ni.com/manuals for complete
specifications.
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NI-9375 Getting Started

NI 9375 Pinout
DI8
DI9
DI10
DI11
DI12
DI13
DI14
DI15
NC
DO COM
DO8
DO9
DO10
DO11
DO12
DO13
DO14
DO15
DI0
DI1
DI2
DI3
DI4
DI5
DI6
DI7
DI COM
NC
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
Vsup
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
DI0
DI1
DI3
DI5
DI7
DO0
DO2
DO4
DO6
DO COM
DI2
DI4
DI6
DI COM
DO1
DO3
DO5
DO7
DI9
DI8
DI10
DI12
DI14
NC
DO9
DO11
DO13
DO15
DI11
DI13
DI15
DO8
DO10
DO12
DO14
Vsup
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
Signal Description
DI Digital input signal connection
DI COM Common reference connection for the digital inputs
DO Digital output signal connection
DO COM Common reference connection for the digital outputs
NC No connection
Vsup Voltage supply connection
Table 1. Signal Descriptions
Sourcing-Output Connections
You can connect 2- and 3-wire sourcing-output devices to the NI 9375.
NI 9375
External
Power
Supply
+
–
Sourcing-Output
Device
DI COM
DI
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NI-9375 Getting Started

The NI 9375 channel registers as ON when the sourcing-output device drives enough
current or applies enough voltage to DI. If no device is connected to DI, the channel
registers as OFF.
Connecting Digital Devices
You can connect a variety of industrial devices, such as solenoids, motors, actuators,
relays, and lamps to the NI 9375. You must connect an external power supply to the
NI 9375. The power supply provides the current for the output channels.
Figure 1. Connecting an Industrial Device to the NI 9375
NI 9375
Device
Vsup
DO
DO COM
External
Power
Supply
+
–
Caution Do not install or remove C Series modules from your system if
any external power supplies connected to the Vsup and COM pins are
powered on.
Attention Ne pas installer ou retirer les modules de la Série C de votre
système si une alimentation externe connectée aux broches Vsup et COM
est sous tension.
Ensure that the devices you connect to the NI 9375 are compatible with the output
specifications of the NI 9375. Refer to the device datasheet at ni.com/manuals for
output specifications.
Note When the industrial device is o, DO is not connected to COM. For
large source impedances, you must use a pull-down resistor between DO
and COM. Go to ni.com/r/cseriesdopulsegen for more information.
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NI-9375 Getting Started

Protecting the Digital Outputs from Flyback Voltages
If the channel is switching an inductive or energy-storing device such as a solenoid,
motor, or relay, and the device does not have flyback protection, install an external
flyback diode.
Figure 2. Connecting a Flyback Diode
NI 9375
External
Power
Supply
+
–
DO COM
Vsup
Inductive
Device
DO
Flyback
Diode
Connecting to a Spring-Terminal Connector
What to Use
■ NI 9375 spring-terminal connector
■ 0.08 mm2 to 1.0 mm2 (28 AWG to 18 AWG) copper conductor wire with 7 mm
(0.28 in.) of insulation stripped from the end
■Flathead screwdriver with a 2.3 mm x 1.0 mm (0.09 in. x 0.04 in.) blade,
included with the NI 9375
What to Do
Complete the following steps to connect wires to the spring-terminal connector.
1 2 3
© National Instruments 9
NI-9375 Getting Started

1. Insert the screwdriver into a spring clamp activation slot to open the
corresponding connector terminal.
2. Press a wire into the open connector terminal.
3. Remove the screwdriver from the activation slot to clamp the wire into place.
High-Vibration Application Connections
If your application is subject to high vibration, NI recommends that you use the
NI 9940 backshell kit to protect connections to the NI 9375 with spring terminal.
I/O Protection
Each DO channel on the NI 9375 has circuitry that protects it from overcurrents
resulting from a short-circuit or faulty loads.
Notice Overvoltage and reverse bias voltage conditions can damage the
NI 9375. Check the voltage specifications for all devices that you connect
to the NI 9375.
When a short circuit is present on a digital output channel, the DO channel cycles o
and on until the short circuit is removed or the current returns to an acceptably low
level. An overcurrent state can aect the performance of the NI 9375 and other
modules in the system. To ensure safe and proper operation, the digital outputs
should not exceed the maximum continuous output current specification.
Where to Go Next
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NI-9375 Getting Started