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Manual National Instruments cFP-RTD-124

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  • National Instruments cFP-RTD-124 - page 1

    323349A-01 October 2002 © 2002 National I nstruments Corp. Al l rights res erved. FieldPoint™, Nati onal Instruments™, NI™, and ni.com™ are trademarks of National Instruments Corpo ration. Product and company names ment ioned herein are trademark s or trade names of their respecti ve companies. For patents covering National Inst ruments pr ...

  • National Instruments cFP-RTD-124 - page 2

    FP-RTD-124 and cFP-RTD-124 2 ni.com Installing the FP-R TD-124 The FP - R TD-124 m o unts on a FieldPoint terminal base (FP - TB - x ). Hot plug-and-play enables you to install the FP-R TD-124 onto a powered terminal base without disturbing the operation of other modules or terminal bases. The FP-R TD-124 receiv es operating power from the terminal ...

  • National Instruments cFP-RTD-124 - page 3

    © National Instruments Corp. 3 FP-RTD-124 and cFP-RTD-124 T o install the cFP-R TD-124, refer to Figure 2 and complete the follow ing steps: 1. Align the capti ve scre ws on the cFP-R TD-124 with the holes on the backplane. The alignment keys on the cFP-R TD-124 pre vent backward insertion. 2. Press firmly to seat the cFP-R TD-124 on the backplane ...

  • National Instruments cFP-RTD-124 - page 4

    FP-RTD-124 and cFP-RTD-124 4 ni.com Wiring the [c]FP-R TD-124 The FP-TB- x terminal bases h av e connectio ns for each of the eig ht input channels on the FP-R TD- 124. The cFP-CB- x connector blocks provide the same connections for the cFP-R TD-124. T able 1 lists the terminal assignments for the signals associated with each channel. If you are us ...

  • National Instruments cFP-RTD-124 - page 5

    © National Instruments Corp. 5 FP-RTD-124 and cFP-RTD-124 Figure 3 sho ws the input circuitr y on one channel. Figure 3. FP-R TD-124 Input Cir cuit T aking Measurements from Four -Wire RTDs Four -wire R TDs generally hav e two wires of one color and tw o of another color (usually red and white). Connect the wires of one color to the positi v e ter ...

  • National Instruments cFP-RTD-124 - page 6

    FP-RTD-124 and cFP-RTD-124 6 ni.com negati ve terminals (COM and SENSE – ). Connect the third wire to the positi ve termi nal (SENSE+). Use a short jumper wire to connect the EXCITE+ terminal to the SENSE+ terminal. Figure 5. Three-Wire R TD Connections on One Channel T aking Measurements from T wo-Wire RTDs Connect one wire of a two-wire R TD to ...

  • National Instruments cFP-RTD-124 - page 7

    © National Instruments Corp. 7 FP-RTD-124 and cFP-RTD-124 Measuring Resistance Y ou can use the [c]FP-R TD-124 to measure resistance in ohms. In this way , you can take measurements from R TDs of types that the [c]FP-R TD-124 does not directly support (such as 120 Ω nick el R TDs) and from resistiv e devices oth er than R TDs. Y ou can measure r ...

  • National Instruments cFP-RTD-124 - page 8

    FP-RTD-124 and cFP-RTD-124 8 ni.com Unfortunately , not all TCR values are as well def ined b y standards organ izations, and the behavio r of R TDs with the same TCR value may vary from vendor to v endor . The va riations are usually small, and the built-in linearization algorithms of the [c]FP-R TD-124 are appropriate for nearly all applications. ...

  • National Instruments cFP-RTD-124 - page 9

    © National Instruments Corp. 9 FP-RTD-124 and cFP-RTD-124 Effects of Lead Resistance The [c]FP-R TD-124 measures resistance by driving a current through a circuit and sensing the resulting voltage. An y resistance in the lead wires that connect to the R TD can add errors to your readings if the measured voltage includes the drop across these wires ...

  • National Instruments cFP-RTD-124 - page 10

    FP-RTD-124 and cFP-RTD-124 10 ni.com connections are isolated from the backplane and the inter-module communication bus. The isolation is provided b y the module, which has optical and galvanic isolation barriers designed and tested to protect against transient fault v oltages of up to 2,300 V rms . Follo w these gui delines to ensure a safe total ...

  • National Instruments cFP-RTD-124 - page 11

    © National Instruments Corp. 11 FP-RTD-124 and cFP-RTD-124 Specifications These specif ications are typical fo r the range – 40 to 70 ° C unless otherwise noted. Input Characteristic s Number of channels ..................... ..... 8 ADC resolution . ........... ............. ........ 16 bits T ype of ADC ....... ........... ........... ....... ...

  • National Instruments cFP-RTD-124 - page 12

    FP-RTD-124 and cFP-RTD-124 12 ni.com Physical Characteristics Indicators ............ ......... ........... .......... Green POWER and READY indicators W eight FP-R TD-124 ........ ............. .......... 140 g (4.8 oz) cFP-R TD-124 ... ............ ............. . 110 g (3.7 oz) Power Requirements Power from network module ............ 350 mW Iso ...

  • National Instruments cFP-RTD-124 - page 13

    © National Instruments Corp. 13 FP-RTD-124 and cFP-RTD-124 Safety The [c]FP-R TD-124 is designed to meet the requirements of the follow ing standards for safety and electrical equipment for measurement, control, and laboratory use. • EN 61010-1, IEC 61010-1 • UL 3121-1 • CAN/CSA C22.2 No. 1010.1 For certif ications under re gulatory standard ...

  • National Instruments cFP-RTD-124 - page 14

    FP-RTD-124 and cFP-RTD-124 14 ni.com Mechanical Dimensions Figure 7 sho ws the mechanical dimen sions of the FP-R TD-124 installed on a terminal base. Dimensions are gi ven in millimeters [inches]. If you are using the cFP-R TD-124, refer to the Compact FieldPoint controller user manual for the dimensions and cabling clearance requirements of the C ...

  • National Instruments cFP-RTD-124 - page 15

    © National Instruments Corp. 15 FP-RTD-124 and cFP-RTD-124 Finland 09 725 725 11, France 01 48 14 24 24, Germany 089 741 31 30, Greece 01 42 96 427, Hong K ong 2645 3186, In dia 91 80 4190000, Israel 03 6393737, Italy 02 41 3091, Japan 03 5472 2970, K orea 02 3451 3400, Malay sia 603 9596711, Mexico 001 800 010 0793, Netherlands 0348 433466, New Z ...

Manufacturer National Instruments Category Network Router

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