National Instruments NI 9375 User manual

GETTING STARTED GUIDE
NI 9375
16 DI/16 DO, 30 VDC, 7 μs Sinking DI, 500 μs
Sourcing DO

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, complete the software 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.
Caution Electrostatic Discharge (ESD) can damage
the NI 9375 with spring terminal. To prevent damage,
use industry-standard ESD prevention measures during
installation, maintenance, and operation.
Safety Guidelines
Operate the NI 9375 only as described in this document.
2| ni.com | NI 9375 Getting Started Guide

Caution Do not operate the NI 9375 in a manner not
specified in this document. Product misuse can result in
a hazard. You can compromise the safety protection
built into the product if the product is damaged in any
way. If the product is damaged, return it to NI for
repair.
Safety Voltages
Connect only voltages that are within the following limits:
NI 9375 with Spring Terminal Isolation Voltages
Channel-to-channel None
Channel-to-earth ground
Continuous 250 Vrms,
Measurement Category II
Withstand up to
4,000 m
3,000 Vrms, verified by a 5 s
dielectric withstand test
Measurement Category II is for measurements performed on
circuits directly connected to the electrical distribution system.
This category refers to local-level electrical distribution, such as
NI 9375 Getting Started Guide | © National Instruments | 3

that provided by a standard wall outlet, for example, 115 V for
U.S. or 230 V for Europe.
Caution Do not connect the NI 9375 with spring
terminal to signals or use for measurements within
Measurement Categories III or IV.
NI 9375 with DSUB Isolation Voltages
Channel-to-COM or
Vsup-to-COM
30 VDC maximum
Isolation
DI bank-to-DO bank 60 VDC maximum
Channel-to-Channel No isolation between channels
Channel-to-earth ground
Continuous 60 VDC,
Measurement Category I
Withstand up to
2,000 m
1,000 Vrms, verified by a 5 s
dielectric withstand test
Measurement Category I is for measurements performed on
circuits not directly connected to the electrical distribution system
referred to as MAINS voltage. MAINS is a hazardous live
4| ni.com | NI 9375 Getting Started Guide

electrical supply system that powers equipment. This category is
for measurements of voltages from specially protected secondary
circuits. Such voltage measurements include signal levels, special
equipment, limited-energy parts of equipment, circuits powered
by regulated low-voltage sources, and electronics.
Caution Do not connect the NI 9375 with DSUB to
signals or use for measurements within Measurement
Categories II, III, or IV.
Note Measurement Categories CAT I and CAT O are
equivalent. These test and measurement circuits are not
intended for direct connection to the MAINS building
installations of Measurement Categories CAT II,
CAT III, or CAT IV.
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
and Ex nA IIC T4 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.
NI 9375 Getting Started Guide | © National Instruments | 5

Caution Do not disconnect I/O-side wires or
connectors unless power has been switched off or the
area is known to be nonhazardous.
Caution Do not remove modules unless power has
been switched off or the area is known to be
nonhazardous.
Caution Substitution of components may impair
suitability for Class I, Division 2.
Caution For Division 2 and Zone 2 applications,
install the system in an enclosure rated to at least IP54
as defined by IEC/EN 60079-15.
Caution For Division 2 and Zone 2 applications,
install a protection device between any two terminals.
The device must prevent the Vsup-to-COM voltage
from exceeding 42 V if there is a transient overvoltage
condition.
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 07 ATEX 0626664X and is IECEx UL 14.0089X
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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 You must make sure that transient
disturbances do not exceed 140% of the rated voltage.
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.
NI 9375 Getting Started Guide | © National Instruments | 7

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 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.
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Caution To ensure the specified EMC performance,
operate this product only with shielded cables and
accessories.
Caution To ensure the specified EMC performance,
the length of all I/O cables must be no longer than 30 m
(100 ft).
Special Conditions for Marine Applications
Some products are Lloyd’s Register (LR) Type Approved for
marine (shipboard) applications. To verify Lloyd’s Register
certification for a product, visit ni.com/certification and search
for the LR certificate, or look for the Lloyd’s Register mark on
the product.
Caution 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.
NI 9375 Getting Started Guide | © National Instruments | 9

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
For NI 9375 with
spring terminal
4,000 m
For NI 9375 with
DSUB
2,000 m
Indoor use only.
Note Refer to the device datasheet on ni.com/manuals
for complete specifications.
10 | ni.com | NI 9375 Getting Started Guide

NI 9375 Pinout
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
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
NI 9375 Getting Started Guide | © National Instruments | 11

Table 1. Signal Descriptions
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
12 | ni.com | NI 9375 Getting Started Guide

Sourcing-Output Connections
NI 9375
External
Power
Supply
+
–
Sourcing-Output
Device
DI COM
DI
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.
NI 9375 Getting Started Guide | © National Instruments | 13

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 the external power supply
connected to the Vsup and COM pins is powered on.
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 off, DO is not
connected to COM. For large source impedances, you
must use a pull-down resistor between DO and COM.
Visit ni.com/info and enter the Info Code
CSeriesDOPulseGen for more information.
14 | ni.com | NI 9375 Getting Started Guide

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
NI 9375 Getting Started Guide | © National Instruments | 15

NI 9375 Connection Guidelines
• Make sure that devices you connect to the NI 9375 are
compatible with the module specifications.
• You must use 2-wire ferrules to create a secure connection
when connecting more than one wire to a single terminal on
the NI 9375 with spring terminal.
• For the NI 9375 with spring terminal, push the wire into the
terminal when using a solid wire or a stranded wire with a
ferrule.
• For the NI 9375 with spring terminal, open the terminal by
pressing the push button when using stranded wire without a
ferrule.
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.
16 | ni.com | NI 9375 Getting Started Guide

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.
Caution 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 off and on until the short circuit is removed or
the current returns to an acceptably low level. An overcurrent
state can affect 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.
NI 9375 Getting Started Guide | © National Instruments | 17

Where to Go Next
CompactRIO NI CompactDAQ
Located at ni.com/manuals
RELATED INFORMATION
C Series Documentation
& Resources
ni.com/info cseriesdoc
Services
ni.com/services
Installs with the software
NI 9375 Datasheet
NI-RIO Help
LabVIEW FPGA Help
NI 9375 Datasheet
NI-DAQmx Help
LabVIEW Help
18 | ni.com | NI 9375 Getting Started Guide

Worldwide Support and Services
The NI website is your complete resource for technical support.
At ni.com/support, you have access to everything from
troubleshooting and application development self-help resources
to email and phone assistance from NI Application Engineers.
Visit ni.com/services for NI Factory Installation Services, repairs,
extended warranty, and other services.
Visit ni.com/register to register your NI product. Product
registration facilitates technical support and ensures that you
receive important information updates from NI.
A Declaration of Conformity (DoC) is our claim of compliance
with the Council of the European Communities using the
manufacturer’s declaration of conformity. This system affords the
user protection for electromagnetic compatibility (EMC) and
product safety. You can obtain the DoC for your product by
visiting ni.com/certification. If your product supports calibration,
you can obtain the calibration certificate for your product at
ni.com/calibration.
NI 9375 Getting Started Guide | © National Instruments | 19