National Instruments NI 9871, Operating Instructions And Specifications

Page 1: ...OPERATING INSTRUCTIONS AND SPECIFICATIONS NI 9871 4 Port RS485 RS422 Serial Module...

Page 2: ...ion about installing configuring and programming the system refer to the system documentation Visit ni com info and enter cseriesdoc for information about C Series documentation Note The safety guidel...

Page 3: ...notes that the component may be hot Touching this component may result in bodily injury Safety Guidelines for Hazardous Locations The NI 9871 is suitable for use in Class I Division 2 Groups A B C D T...

Page 4: ...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...

Page 5: ...ster 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 Regis...

Page 6: ...vide connections for four RS485 RS422 devices Table 1 RS485 RS422 Port Pinout RJ 50 Pin Signal Name 1 No Connect 2 TXD 3 TXD 4 RTS 5 CTS 6 RXD 7 RXD 8 RTS 9 CTS 10 GND These signals are shared by all...

Page 7: ...he 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 2 CTS 3 R...

Page 8: ...igtail 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 To ensure the specified EMC performance do not...

Page 9: ...uctions 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 Vsup and COM terminals using the incl...

Page 10: ...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 ma...

Page 11: ...s Caution All connections must be made before power is applied Figure 3 Powering Multiple Modules from a Single Power Supply Red Black NI P N 198303 XX Male Microfit Y Adapter NI P N 198159 XX Female...

Page 12: ...bus topologies and termination Figure 4 4 Wire Full Duplex Multidrop Network Using Terminating Resistors Figure 5 2 Wire Multidrop Network Using Terminating Resistors RS485 terminators are available a...

Page 13: ...rent RS485 transceiver control modes 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 w...

Page 14: ...te 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...

Page 15: ...wer consumption from chassis Active mode 0 5 W max Sleep mode 50 W max Thermal dissipation at 70 C Active mode 1 5 W max Sleep mode 55 mW max Required external supply voltage range VSUP 8 to 28 VDC Po...

Page 16: ...em 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...

Page 17: ...dielectric withstand test up to 5 000 m altitude 500 Vrms verified by a 5 s dielectric withstand test Safety Standards This product meets the requirements of the following standards of safety for elec...

Page 18: ...C D T4 Class I Zone 2 Ex nA II T4 Europe DEMKO Ex nA IIC T4 Environmental Refer to the installation instructions for the chassis you are using for more information about meeting these specifications O...

Page 19: ...only Shock and Vibration To meet these specifications you must panel mount the CompactRIO system Operating vibration random IEC 60068 2 64 5 grms 10 to 500 Hz Operating shock IEC 60068 2 27 30 g 11 ms...

Page 20: ...y 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 e...

Page 21: ...e 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...

Page 22: ...the end of the product life cycle all products must be sent to a WEEE recycling center For more information about WEEE recycling centers National Instruments WEEE initiatives and compliance with WEEE...

Page 23: ...e 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 suppor...

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