32-channel, 24 v sourcing digital output module (24 pages)
Summary of Contents for National Instruments 9871
Page 1
GETTING STARTED GUIDE NI 9871 4-Port, RS485/RS422 Serial Module 한국어 日本語 Français Deutsch 简体中文 ni.com/manuals...
Page 2
The guidelines in this document are specific to Note the NI 9871. 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.
Page 3
Instruments for repair. Safety Guidelines for Hazardous Locations The NI 9871 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.
Page 4
IECEx 14.0089X certified. Each NI 9871 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 9871 4 | ni.com | NI 9871 Getting Started Guide...
Page 6
EMC performance is attained. Wiring the NI 9871 The NI 9871 has four RJ-50 receptacles that provide connections for four RS485/RS422 devices. 6 | ni.com | NI 9871 Getting Started Guide...
Page 8
NI pinout on a DB-9 male connector, as shown in Table 2. Table 2. Pin Assignments for RS485/RS422 DB-9 Male Connector Connector RJ-50 Pin Signal Name CTS+ RTS+ RXD+ RXD- CTS- RTS- TXD+ TXD- 8 | ni.com | NI 9871 Getting Started Guide...
Page 9
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.
Page 10
1. V 2. V 3. COM 4. COM Figure 2 shows the method of power connection to the NI 9871 module. Attach an isolated power supply to the V and COM terminals using the included pigtail. 10 | ni.com | NI 9871 Getting Started Guide...
Page 11
Figure 2. Powering the NI 9871 from an Isolated Power Source Red (+) V– Black (–) Any 8 to 28 V Isolated Power Supply NI P/N 198159-XX: Female Microfit Pigtail Figure 3 shows how to use the optional Y-adapter (available at ni.com/serial) to connect power to more than one module using...
Page 12
Power Supply NI P/N 198303-XX: Male Microfit Y-Adapter 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. 12 | ni.com | NI 9871 Getting Started Guide...
Page 14
Auto DTR# 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. 14 | ni.com | NI 9871 Getting Started Guide...
Page 16
0.5 W max Sleep mode 50 µW max Thermal dissipation (at 70 °C) Active mode 1.5 W max Sleep mode 55 W max Required external supply +8 to +28 VDC voltage range (V 16 | ni.com | NI 9871 Getting Started Guide...
Page 18
Do not connect to signals or use for Caution measurements within Measurement Categories II, III, or IV. Isolation Voltages Port-to-earth ground Continuous 60 VDC, Measurement Category I up to 5,000 m in altitude 18 | ni.com | NI 9871 Getting Started Guide...
Page 20
Operating temperature -40 °C to 70 °C (IEC 60068-2-1, IEC 60068-2-2) Storage temperature -40 °C to 85 °C (IEC 60068-2-1, IEC 60068-2-2) Ingress protection IP 30 20 | ni.com | NI 9871 Getting Started Guide...
Page 22
ICES-001: Class A emissions For the standards applied to assess the EMC of Note this product, refer to the Online Product Certification section. For EMC compliance, operate this product Note according to the documentation. 22 | ni.com | NI 9871 Getting Started Guide...
Page 24
NI products in your region, visit ni.com/ environment/weee. 电子信息产品污染控制管理办法(中国 RoHS) National Instruments 符合中国电子信息产 中国客户 品中限制使用某些有害物质指令(RoHS)。关于 National Instruments 中国 RoHS 合规性信息,请登 录 。(For ni.com/environment/rohs_china information about China RoHS compliance, go to ni.com/environment/rohs_china 24 | ni.com | NI 9871 Getting Started Guide...
Page 26
National Instruments corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504. National Instruments also has offices located around the world. For telephone support in the United States, create your service request at ni.com/support or dial 1 866 ASK MYNI (275 6964).