National Instruments Network Card NI 9485 User Manual

ONPIER9AT4IN8G5INSTRUCTIONS  
8-Channel Solid-State Relay (SSR) Digital Output  
Module  
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Safety Guidelines for Hazardous Voltages  
If hazardous voltages are connected to the module, take the  
following precautions. A hazardous voltage is a voltage greater  
than 42.4 Vpk 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 When module terminals are hazardous voltage  
LIVE (>42.4Vpk/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.  
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Figure 1 shows the NI 9939 connector backshell.  
Figure 1. NI 9939 Connector Backshell  
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 II T4 and  
Ex nA II 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.  
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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 Zone 2 applications, install the system in an  
enclosure rated to at least IP 54 as defined by IEC 60529  
and EN 60529.  
Caution For 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.  
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Special Conditions for Hazardous Locations Use in Europe  
This equipment has been evaluated as EEx nA II T4 equipment  
under DEMKO Certificate No. 03 ATEX 0324020X. The  
equipment is marked  
II 3G and is suitable for use in  
Zone 2 hazardous locations.  
Wiring the NI 9485  
The NI 9485 has a 16-terminal, detachable screw-terminal  
connector that provides connections for eight solid-state relay  
channels. Each channel has two interchangeable terminals, CHa  
and CHb. Refer to Table 1 for the terminal assignments for each  
channel.  
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Table 1. Terminal Assignments  
Module  
Terminal  
Signal  
CH0a  
CH0b  
CH1a  
CH1b  
CH2a  
CH2b  
CH3a  
CH3b  
CH4a  
CH4b  
CH5a  
CH5b  
CH6a  
CH6b  
CH7a  
CH7b  
0
1
2
3
0
1
2
3
4
5
6
7
8
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
9
10  
11  
12  
13  
14  
15  
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Wiring for High-Vibration Applications  
If an application is subject to high vibration, National Instruments  
recommends that you either use ferrules to terminate wires to the  
detachable screw-terminal connector or use the NI 9939 backshell  
kit to protect the connections. Refer to Figure 2 for an illustration.  
Ferrule  
Figure 2. 16-Pin Detachable Screw Terminal with Ferrule  
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Connecting Loads to the NI 9485  
You can connect loads to the NI 9485. Connect the load to one of  
the leads of the power source. Connect either the CHa or the CHb  
terminal to the load and the other terminal to the other lead of the  
AC or DC power source. Figure 3 shows a possible configuration  
where the load is connected to the CHb terminal and the DC or AC  
power source.  
CHa  
+
or  
Load  
AC  
CHb  
NI 9485  
Figure 3. Connecting a Load to the NI 9485  
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When you write an ON command to a channel, the SSR is closed  
and the terminal that is connected to the load allows current to flow  
or allows voltage to be applied to the load. When you write an OFF  
command to a channel, the switch opens, disconnecting the circuit  
so no current flows and no voltage is applied to the load.  
Protecting Inductive Loads  
When inductive loads are connected to the NI 9485 relay outputs,  
a large counter-electromotive force may occur at switching time  
because of the energy stored in the inductive load. These flyback  
voltages can damage the relay outputs and/or the external power  
supply.  
Limit flyback voltages at your inductive load by installing one of  
the following:  
For DC loads—Install a flyback diode within 18 in. of the load.  
For AC loads—Install a metal oxide varistor (MOV) rated for  
30 Vrms or slightly higher.  
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Figures 4 and 5 show examples of using an external flyback diode  
to protect DC inductive loads and an MOV to protect AC inductive  
loads, respectively.  
Flyback Diode for  
DC Inductive Loads  
CHa  
Inductive  
Load  
+
VDC  
CHb  
NI 9485  
Figure 4. Contact Protection for DC Inductive Loads  
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MOV for AC  
Inductive Loads  
CHa  
CHb  
Inductive  
Load  
VAC  
NI 9485  
Figure 5. Contact Protection for AC Inductive Loads  
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 documentation for information  
about support for sleep mode. You can enable sleep mode in  
software. Refer to the driver software documentation for more  
information.  
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Typically, when a system is in sleep mode, you cannot  
communicate with the modules. In sleep mode, the SSRs open to  
prevent current from flowing through the load. Consequently, 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 70 °C  
unless otherwise noted.  
Output Characteristics  
Number of channels..........................8 digital output channels  
Relay type.........................................Normally open solid-state  
relay (SSR)  
Switching voltage .............................60 VDC max, 30 Vrms max  
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Switching current, per channel1  
All channels................................0.75 A max  
Up to four channels ....................1.2 A max  
Switching rate (90% duty cycle)1 .....1 operation per second  
Relay open time................................0.5 ms typ  
Relay close time................................9.0 ms typ  
On resistance.....................................200 mΩ max  
Off state leakage ...............................30 μA typ  
MTBF ...............................................2,172,740 hours at 25 °C;  
Bellcore Issue 6, Method 1,  
Case 3, Limited Part Stress  
Method  
Note Contact NI for Bellcore MTBF specifications  
at other temperatures or for MIL-HDBK-217F  
specifications.  
1
For additional specifications related to faster switching rates and/or higher currents  
at lower temperatures, go to ni.com/info and enter the info code rd9485specs.  
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Power Requirements  
Power consumption from chassis  
Active mode ...............................500 mW max  
Sleep mode .................................5 mW max  
Thermal dissipation (at 70 °C)  
Active mode ...............................1.5 W max  
Sleep mode .................................5 mW max  
Physical Characteristics  
If you need to clean the module, wipe it with a dry towel.  
Screw-terminal wiring ......................12 to 24 AWG copper  
conductor wire with 10 mm  
(0.39 in.) of insulation  
stripped from the end  
Ferrules .............................................0.25 mm2 to 0.5 mm2  
Torque for screw terminals ...............0.5 to 0.6 N · m  
(4.4 to 5.3 lb · in.)  
Weight...............................................Approx. 145 g (5.1 oz)  
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Safety  
Safety Voltages  
Connect only voltages that are within these limits.  
Channel a-to-Channel b....................60 VDC max, 30 Vrms max  
Isolation  
Channel-to-channel  
Continuous...........................60 VDC  
Withstand .............................1,390 Vrms, verified by a 5 s  
dielectric withstand test  
Channel-to-earth ground  
Continuous...........................250 Vrms  
,
Measurement Category II  
Withstand .............................2,300 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  
that provided by a standard wall outlet (for example, 115 V for U.S.  
or 230 V for Europe). Do not connect to signals or use for  
measurements within Measurement Categories III or IV.  
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Safety Standards  
The NI 9485 is designed to meet the requirements of the following  
standards of safety for electrical equipment for measurement,  
control, and laboratory use:  
IEC 61010-1, EN-61010-1  
UL 61010-1, CSA 61010-1  
Note For UL and other safety certifications, refer to the  
product label or visit ni.com/certification, search  
by module number or product line, and click the  
appropriate link in the Certification column.  
Hazardous Locations  
U.S. (UL) ..........................................Class I, Division 2,  
Groups A, B, C, D, T4;  
Class I, Zone 2,  
AEx nA II T4  
Canada (C-UL) .................................Class I, Division 2,  
Groups A, B, C, D, T4;  
Class I, Zone 2,  
Ex nA II T4  
Europe (DEMKO).............................EEx nA II T4  
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NI 9485 Operating Instructions  
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Environmental  
National Instruments C Series modules are intended for indoor use  
only but may be used outdoors if installed in a suitable enclosure.  
Refer to the installation instructions for the chassis you are using  
for more information about meeting these specifications.  
Operating temperature  
(IEC 60068-2-1, IEC 60068-2-2) .....40 to 70 °C  
Storage temperature  
(IEC 60068-2-1, IEC 60068-2-2) .....40 to 85 °C  
Ingress protection..............................IP 40  
Operating humidity  
(IEC 60068-2-56)..............................10 to 90% RH,  
noncondensing  
Storage humidity  
(IEC 60068-2-56)..............................5 to 95% RH,  
noncondensing  
Maximum altitude.............................2,000 m  
Pollution Degree (IEC 60664)..........2  
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Shock and Vibration  
To meet these specifications, you must panel mount the system  
and either use ferrules to terminate wires to the detachable  
screw-terminal connector or use the NI 9939 backshell kit to  
protect the connections.  
Operating vibration  
Random (IEC 60068-2-34).........5 grms, 10 to 500 Hz  
Sinusoidal (IEC 60068-2-6) .......5 g, 10 to 500 Hz  
Operating shock  
(IEC 60068-2-27)..............................30 g, 11 ms half sine,  
50 g, 3 ms half sine,  
18 shocks at 6 orientations  
Electromagnetic Compatibility  
This product is designed to meet the requirements of the following  
standards of EMC for electrical equipment for measurement,  
control, and laboratory use:  
EN 61326 EMC requirements; Industrial Immunity  
EN 55011 Emissions; Group 1, Class A  
CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A  
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NI 9485 Operating Instructions  
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Note For EMC compliance, operate this device  
according to product documentation.  
CE Compliance  
This product meets the essential requirements of applicable  
European Directives, as amended for CE marking, as follows:  
73/23/EEC; Low-Voltage Directive (safety)  
89/336/EEC; Electromagnetic Compatibility Directive (EMC)  
Note Refer to the Declaration of Conformity (DoC) for  
this product for any additional regulatory compliance  
information. To obtain the DoC for this product, visit  
ni.com/certification, search by module number  
or product line, and click the appropriate link in the  
Certification column.  
Waste Electrical and Electronic Equipment (WEEE)  
EU Customers At the end of their life cycle, all products  
must be sent to a WEEE recycling center. For more  
information about WEEE recycling centers and National  
Instruments WEEE initiatives, visit ni.com/  
environment/weee.htm.  
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National Instruments Contact Information  
The National Instruments Web site 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.  
National Instruments corporate headquarters is located at  
11500 North Mopac Expressway, Austin, Texas, 78759-3504.  
National Instruments also has offices located around the world to  
help address your support needs. For telephone support in the  
United States, create your service request at ni.com/support  
and follow the calling instructions or dial 512 795 8248. For  
telephone support outside the United States, contact your local  
branch office:  
Australia 1800 300 800, Austria 43 662 457990-0,  
Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,  
Canada 800 433 3488, China 86 21 5050 9800,  
Czech Republic 420 224 235 774, Denmark 45 45 76 26 00,  
Finland 385 (0) 9 725 72511, France 33 (0) 1 48 14 24 24,  
Germany 49 89 7413130, India 91 80 41190000,  
Israel 972 3 6393737, Italy 39 02 413091, Japan 81 3 5472 2970,  
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Korea 82 02 3451 3400, Lebanon 961 (0) 1 33 28 28,  
Malaysia 1800 887710, Mexico 01 800 010 0793,  
Netherlands 31 (0) 348 433 466, New Zealand 0800 553 322,  
Norway 47 (0) 66 90 76 60, Poland 48 22 3390150,  
Portugal 351 210 311 210, Russia 7 495 783 6851,  
Singapore 1800 226 5886, Slovenia 386 3 425 42 00,  
South Africa 27 0 11 805 8197, Spain 34 91 640 0085,  
Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151,  
Taiwan 886 02 2377 2222, Thailand 662 278 6777,  
Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545  
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National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the  
Terms of Use section on ni.com/legal for more information about National Instruments trademarks. Other  
product and company names mentioned herein are trademarks or trade names of their respective companies.  
For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software,  
the patents.txt file on your CD, or ni.com/patents.  
© 2006–2007 National Instruments Corp. All rights reserved.  
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