NI 9871 Operating Instructions
Contents
1. Isolated Power Supply NI P N 198159 XX Female Microfit Pigtail Figure 2 Powering the NI 9871 from an Isolated Power Source Figure 3 shows how to use the optional y adapter available at ni com serial to connect power to more than one module using the same power source One y adapter is needed for each additional module Ensure that the power supply can handle maximum power requirements for all modules connected NI 9871 Operating Instructions 10 ni com Caution All connections must be made before power is UN applied NI P N 198159 XX Female Microfit Pigtail 588 Any 8 28 V Isolated Power Supply Black NI P N 198303 XX Male Microfit Y Adapter Figure 3 Powering Multiple Modules from a Single Power Supply National Instruments 11 NI 9871 Operating Instructions RS485 Bus Topology and Termination Refer to Figure 4 and Figure 5 for an overview of 4 wire and 2 wire RS485 bus topologies and termination Y ave 1 y Slave 2 5 AN ave n T A 1200 7 1900 1 UE o 4 JH gt 209 i 1200 Figure 4 4 Wire Full Duplex Multidrop Network Using Terminating Resistors tt Slave 1 A Slave 2 WA Slave n Rx WA MASTER i200 l 7 1202. Figure 5 2 Wire Multidrop Network Using Terminating Resistors RS485 terminators are available at ni com serial NI 9871 Operating Instructions 12 ni com RS485 Transceiver Control Refer to Table 3 for a listing of TX and RX enable conditions for the different RS485 transceiver control modes Table 3 Transceiver Control Pin Conditions 2 Wire Enable 4 Wire DTR Echo DTR No Echo Auto TX On DTR DTR TX RX On On DTR TX NI 9871 Hardware Overview The NI 9871 has four independent RS485 RS422 ports that are isolated from the other modules in the system Each port is fully compatible with the ANSI EIA TIA 485 standard National Instruments 13 NI 9871 Operating Instructions Sleep Mode CompactRIO Only You can enable sleep mode for the CompactRIO system in software In sleep mode the system consumes less power and may dissipate less heat Typically when a system is in sleep mode you cannot communicate with the modules 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 Maximum baud 3 6864 Mbps Maximum module throughput 1 28 Mbps Maximum cable length 1 2 km 4 000 ft Data line ESD protection human body model
3. 15 ie ncc rs 514 016 hours at 25 C Bellcore Issue 6 Method 1 Case 3 Limited Part Stress Method NI 9871 Operating Instructions 14 ni com Note Contact NI for Bellcore MTBF specifications at other temperatures or for MIL HDBK 217F specifications Power Requirements Power consumption from chassis Active mode Sleep Thermal dissipation at 70 Active mode sese 1 5 W max Sleep mode 55 mW max Required external supply voltage range 8 to 28 VDC Power supply consumption from external supply Vsyp Wy pieal 1W Maximum siisii 3 5 W Physical Characteristics If you need to clean the module wipe it with a dry towel Weight nuce ri Approx 153 g 5 4 oz National Instruments 15 NI 9871 Operating Instructions Safety Maximum Voltage Connect only voltages that are within these limits RS485 RS422 Port to COM 8 to 13 VDC max Measurement Category I Vsup to COM sess x28 V max Measurement Category I 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 measurement
4. 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 9871 ina 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 National Instruments 3 NI 9871 Operating Instructions gt gt 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 CompactRIO 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 between the RS232 signal cables and the NI 9871 RJ 50 jacks ports 1 4 The device must prevent the RS232 signal to signal or signal to COM voltage from exceeding 35 V if there is a transient overvoltage condition Caution For Zone 2 applications install a protection device between the external power supply and the NI 9871 V sup and COM pins The device must prevent the Voup to COM voltage from exceeding 39 V if there is a transient overvoltage condition NI 9871 Operating Instructions 4
5. OPERATING INSTRUCTIONS AND SPECIFICATIONS NI 9871 4 Port RS485 RS422 Serial Module b f NATIONAL y INSTRUMENTS This document describes how to use the National Instruments 9871 and includes specifications and pin assignments for the NI 9871 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 com info and enter cseriesdoc for information about C Series documentation Note The safety guidelines and specifications in this document are specific to the NI 9871 The other components in your system may not meet the same safety ratings and specifications Refer to the documentation for each component in your system to determine the safety ratings and specifications for the entire system NI 9871 Operating Instructions 2 ni com Safety Guidelines Caution Do not operate the NI 9871 in a manner not specified in the user manual or operating instructions 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 National Instruments for repair Hot Surface This icon denotes that the component may be hot Touching this component may result in bodily injury Safety Guidelines for Hazardous Locations The NI 9871
6. ducts must be sent to a WEEE recycling center For more information about WEEE recycling centers National Instruments WEEE initiatives and compliance with WEEE Directive 2002 96 EC on Waste and Electronic Equipment visit ni com environment weee BERI SIdaBemJGK CHE RoHS EIA National Instruments HAt Ed rf fei oo r dp B ap f AREE FE RTA ROHS XF National Instruments HE RoHS I ni com environment rohs china Forinformation about China RoHS compliance go to ni com environment rohs china NI 9871 Operating Instructions 22 ni com Where to Go for Support The National Instruments Web site is your complete resource for technical support Atni 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 visit the Worldwide Offices section of com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers
7. email addresses and current events National Instruments 23 NI 9871 Operating Instructions LabVIEW National Instruments NI ni com the National Instruments corporate logo and the Eagle logo are trademarks of National Instruments Corporation Refer to the Trademark Information at ni com trademarks for other 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 technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at com patents Refer to the Export Compliance Information at ni com legal export compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes ECCNs and other import export data 2007 2012 National Instruments All rights reserved 372277E 01 Apr12
8. ni com Special Conditions for Safe Use in Europe This equipment has been evaluated as Ex nA IIC T4 equipment under DEMKO Certificate No 07 ATEX 0626664X Each module is marked II 3G and is suitable for use in Zone 2 hazardous locations Special Guidelines for Marine Applications Some modules are Lloyd s Register LR Type Approved for marine shipboard applications To verify Lloyd s Register certification for a module visit ni com certification and search for the LR certificate or look for the Lloyd s Register mark on the product label Caution In order to meet the EMC requirements for marine applications install the module 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 National Instruments 5 NI 9871 Operating Instructions Wiring the NI 9871 The NI 9871 has four RJ 50 receptacles that provide connections for four RS485 RS422 devices Table 1 RS485 RS422 Port Pinout RJ 50 Pin Signal Name 1 No Connect 2 TXD 3 TXD RJ50 Jack TL NC 4 RTS 2 TXD 3 TXD 5 CTS 4 RTS 5 CTS 6 RXD 6 RXD 7 RXD 7 RXD 8 RTS 9 7 CTS 10 COM RTS 9 CTS 10 GND These signals are shared by all four RJ 50 connectors on the NI 9871 NI 9871 Opera
9. s include signal levels special equipment limited energy parts of equipment circuits powered by regulated low voltage sources and electronics Caution Do not connect to signals or use for measurements within Measurement Categories II III or IV The maximum voltage that can be applied or output without creating a safety hazard NI 9871 Operating Instructions 16 ni com Isolation Voltages Port to earth ground Continuous 60 VDC Measurement Category I up to 5 000 m altitude Withstand up to 2 000 m altitude 1000 Vms verified by a 5 s dielectric withstand test up to 5 000 m altitude 500 V Verified by a 5 s dielectric withstand test Safety Standards This product meets the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use e 61010 1 EN 61010 1 e UL61010 1 CSA 61010 1 Note For UL and other safety certifications refer to the product label or the Online Product Certification section National Instruments 17 NI 9871 Operating Instructions Hazardous Locations WS UL srt Class I Division 2 Groups A B C D T4 Class I Zone 2 AEx nA II TA Canada 01 Class I Division 2 Groups A B C D T4 Class L Zone 2 Ex nA II T4 Europe Ex nA IIC T4 Environmental Refer
10. the EMC of this product refer to the Online Product Certification section 3 Note For EMC compliance operate this product according to the documentation NI 9871 Operating Instructions 20 ni com CE Compliance C This product meets the essential requirements of applicable European Directives as follows e 2006 95 EC Low Voltage Directive safety e 2004 108 EC Electromagnetic Compatibility Directive EMC Online Product Certification Refer to the product Declaration of Conformity DoC for additional regulatory compliance information To obtain product certifications and the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column Environmental Management NI is committed to designing and manufacturing products in an environmentally responsible manner NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers For additional environmental information refer to the NI and the Environment Web page at ni com environment This page National Instruments 21 NI 9871 Operating Instructions contains the environmental regulations and directives with which NI complies as well as other environmental information not included in this document Waste Electrical and Electronic Equipment WEEE EU Customers At the end of the product life cycle all pro
11. ting Instructions 6 ni com The cables included with your kit convert the RJ 50 pinout to the standard NI pinout as shown in Table 2 Table 2 Pin Assignments for RS485 RS422 DB 9 Male Connector Connector Pin Signal 1 GND O 2 CTS 3 RTS 6 o 4 RXD E 5 RXD 91190 5 6 CTS 7 RTS 8 TXD 9 TXD National Instruments 7 NI 9871 Operating Instructions You must connect an external power supply to the NI 9871 This power supply provides the power for the RS485 RS422 transceivers on the module You can use the included female four position pigtail to connect to an external voltage source Figure 1 lists the connections between an external voltage source of 8 V to 28 V and the NI 9871 Caution ensure the specified EMC performance do not connect the power input to a d c mains supply or to any supply requiring a connecting cable longer than 30 m 100 ft A d c mains supply is a local d c electricity supply network in the infrastructure of a certain site or building NI 9871 Operating Instructions 8 ni com 1 Vsue 2 Vsup 3 COM 4 COM Figure 1 Four Position External Power Connector Figure 2 shows the method of power connection to the NI 9871 module Attach an isolated power supply to the Vy and COM terminals using the included pigtail National Instruments 9 NI 9871 Operating Instructions Black 8 28
12. to the installation instructions for the chassis you are using for more information about meeting these specifications Operating temperature 40 to 70 C Storage temperature 40 to 85 Ingress IP 30 Operating humidity 10 to 90 RH noncondensing Storage humidity 5 to 9596 RH noncondensing NI 9871 Operating Instructions 18 ni com Pollution Degree 60664 2 Maximum altitude 5 000 m Indoor use only Shock and Vibration To meet these specifications you must panel mount the CompactRIO system Operating vibration random IEC 60068 2 64 5 gs 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 Operating vibration sinusoidal IEC 60068 2 6 5 g 10 to 500 Hz National Instruments 19 NI 9871 Operating Instructions Electromagnetic Compatibility This product meets the requirements of the following EMC standards for electrical equipment for measurement control and laboratory use EN 61326 IEC 61326 Class A emissions Basic immunity EN 55011 CISPR 11 Group 1 Class A emissions AS NZS CISPR 11 Group 1 Class A emissions FCC 47 CFR Part 15B Class A emissions ICES 001 Class A emissions Note For the standards applied to assess
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