National Instruments NI 9485 User manual

GETTING STARTED GUIDE
NI 9485
8-Channel Solid-State Relay (SSR) Digital
Output Module

This document explains how to connect to the NI 9485.
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 9485. 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
Operate the NI 9485 only as described in this document.
Caution Do not operate the NI 9485 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.
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Safety Guidelines for Hazardous Voltages
If hazardous voltages are connected to the device, take the
following precautions. A hazardous voltage is a voltage greater
than 42.4 Vpk voltage or 60 VDC to earth ground.
Caution Ensure that hazardous voltage wiring is
performed only by qualified personnel adhering to local
electrical standards.
Caution Do not mix hazardous voltage circuits and
human-accessible circuits on the same module.
Caution Ensure that devices and circuits connected to
the module are properly insulated from human contact.
Caution When module terminals are hazardous
voltage LIVE (>42.4 Vpk/60 VDC), you must ensure
that devices and circuits connected to the module are
properly insulated from human contact. You must use
the NI 9939 connector backshell kit to ensure that the
terminals are not accessible.
NI 9485 Getting Started Guide | © National Instruments | 3

Safety Voltages
Connect only voltages that are within the following limits.
Maximum voltage, Channel a
to Channel b
60 VDC, 30 Vrms
Isolation
Channel-to-channel (up to 5,000 m)
Continuous 60 VDC, Measurement
Category I
Withstand 1,000 Vrms, verified by a 5 s
dielectric withstand test
Channel-to-earth ground (up to 2,000 m)
Continuous 250 Vrms, Measurement
Category II
Withstand 2,300 Vrms, verified by a 5 s
dielectric withstand test
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Channel-to-earth ground (up to 5,000 m)
Continuous 60 VDC, Measurement
Category I
Withstand 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
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 9485 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
NI 9485 Getting Started Guide | © National Instruments | 5

installations of Measurement Categories CAT II,
CAT III, or CAT IV.
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
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 9485 to signals or use
for measurements within Measurement Categories III
or IV.
Safety Guidelines for Hazardous Locations
The NI 9485 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 9485 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 off or the
area is known to be nonhazardous.
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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 across the positive and
negative terminals of the external power supply (or
supplies). The device must prevent the external power
supply from exceeding 80 V if there is a transient
overvoltage condition.
Special Conditions for Hazardous Locations Use in
Europe and Internationally
The NI 9485 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO Certificate No. 03 ATEX 0324020X and is
IECEx 14.0089X certified. Each NI 9485 is marked II 3G and
is suitable for use in Zone 2 hazardous locations, in ambient
NI 9485 Getting Started Guide | © National Instruments | 7

temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9485
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 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)
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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.
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.
NI 9485 Getting Started Guide | © National Instruments | 9

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.
Preparing the Environment
Ensure that the environment in which you are using the NI 9485
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 5,000 m
Indoor use only.
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Note Refer to the device datasheet on ni.com/manuals
for complete specifications.
Connecting the NI 9485
The NI 9485 has a 16-terminal, detachable screw-terminal
connector.
NI 9485 Getting Started Guide | © National Instruments | 11

Figure 1. NI 9485 Pinout
CH0a
CH0b
CH1a
CH1b
CH2a
CH2b
CH3a
CH3b
CH4a
CH4b
CH5a
CH5b
CH6a
CH6b
CH7a
CH7b
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Connecting Loads
You can connect loads to the NI 9485.
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Figure 2. Connecting a Load
NI 9485
+
–
Load
or
AC
CHa
CHb
When the channel is turned on, the terminal connected to the load
drives current or applies voltage to the load. When the channel is
off, the terminal does not drive current or apply voltage to the
load.
Protecting Inductive Loads
When you connect inductive loads to the NI 9485 SSR outputs, a
large counter-electromotive force may occur at switching time as
a result of the energy stored in the inductive load. These flyback
voltages can damage the relay outputs and/or the external power
supply.
NI 9485 Getting Started Guide | © National Instruments | 13

Limit flyback voltages at the inductive load by installing one of
the following:
• For DC loads—Install a flyback diode within 45.72 cm of the
load.
• For AC loads—Install a metal oxide varistor (MOV) rated for
30 Vrms or slightly higher.
Figure 3. Contact Protection for DC Inductive Loads
+
–
CHa
CHb
Inductive
Load
NI 9485
Flyback Diode for
DC Inductive Loads
VDC
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Figure 4. Contact Protection for AC Inductive Loads
CHa
CHb
Inductive
Load
NI 9485
MOV for AC
Inductive Loads
VAC
High-Vibration Application Connections
If your application is subject to high vibration, NI recommends
that you follow these guidelines to protect connections to the
NI 9485:
• Use ferrules to terminate wires to the detachable connector.
• Use the NI 9939 backshell kit.
NI 9485 Getting Started Guide | © National Instruments | 15

Where to Go Next
Located at ni.com/manuals Installs with the software
CompactRIO NI CompactDAQ
RELATED INFORMATION
NI 9485 Datasheet
NI-RIO Help
LabVIEW FPGA Help
NI 9485 Datasheet
NI-DAQmx Help
LabVIEW Help
C Series Documentation
& Resources
ni.com/info cseriesdoc
Services
ni.com/services
16 | ni.com | NI 9485 Getting Started Guide

Worldwide Support and Services
The National Instruments 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 National Instruments
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 9485 Getting Started Guide | © National Instruments | 17

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For telephone support in the United States, create your service
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374820D-01 May15