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National Instruments CFP-CTR-502 manual

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Table of contents for the manual

  • Page 1

    323324B-01 June 2003 © 2002–2003 Nationa l Instruments Corp. A ll rights res erved. FieldPoint™, Nati onal Instruments™, NI™, and ni.com™ are trademarks of N ational 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 rumen[...]

  • Page 2

    FP-CTR-502 and cFP-CTR-502 2 ni.com Installing the FP-CTR-502 The FP-CTR-502 mounts on a FieldPoint terminal base (FP-TB- x ), which provides operating po wer to the module. Instal ling the FP-CTR-502 onto a po wered termin al base does not disrupt the operation of the FieldPoint bank. T o install the FP-CTR-502, refer to Figure 1 and complete the [...]

  • Page 3

    © National Instruments Corp. 3 FP-CTR-502 and cFP-CTR-502 2. Press firmly to seat the cFP-CTR-502 on the backplane. 3. Using a number 2 Phillips scre wdri ver with a shank of at least 64 mm (2.5 in.) length, tighten the capti v e scre ws to 1.1 N ⋅ m (10 lb ⋅ in.) of torque. The nylon coating on the screws pre v ents them from loosening. Figur[...]

  • Page 4

    FP-CTR-502 and cFP-CTR-502 4 ni.com Use a 5–30 VDC external po wer s upply for the input channels. The power supply must provid e e nough current to po wer all of the input channels and all of the f i eld de vices on the output channels. Connect the external po wer supply to multiple V and V SUP terminals and to multiple C and COM t erminals as n[...]

  • Page 5

    © National Instruments Corp. 5 FP-CTR-502 and cFP-CTR-502 Inputs Each input channel has one input terminal, V IN . Each channel also has V SUP and COM terminals that can supply power to f ield de vices or provide additional conne ctions to the external po wer supply . Y ou can connect the eigh t count-input channels and four gate-input channels to[...]

  • Page 6

    FP-CTR-502 and cFP-CTR-502 6 ni.com V IN is 21 V or lower , a nd an OF F state when V IN is 22 V or higher . The channel state is indeterminate when V IN is between 21 V a n d2 2V . Ensure that the sinking-output de vices ha v e OFF state leak age currents of less than 0.3 mA so they do not send false ON state readings to the [c]FP-CTR-502. Note Yo[...]

  • Page 7

    © National Instruments Corp. 7 FP-CTR-502 and cFP-CTR-502 Figure 4. Wiring an O utput Channel to a Sourcing-Input Device If you connect a [c]FP-CTR-502 output to an e xternally po wered sourcing-input device, be a ware th at the voltage applied to the V OUT terminal b y the exte rnal de vice must not exceed the volta ge lev el of the po wer supply[...]

  • Page 8

    FP-CTR-502 and cFP-CTR-502 8 ni.com Configuring Count-Input Channels Channels 0 –7 are count-input channels. In FieldPoint software, you can conf igure each count-i nput channel to operate with attributes and comman ds. In th e Channel Conf iguration dialog box, select attrib utes for ea ch channel from the Attributes menu and commands from the C[...]

  • Page 9

    © National Instruments Corp. 9 FP-CTR-502 and cFP-CTR-502 to Channel 0, Channel 0 to Chan nel 7, Channel 7 to Channel 6, and so on. If you select this op ti on for all of the channels, no counting occurs. Gate Source Select Gate Input 0 –3 from the V alue menu to associate a gate-input channel with a count-i nput channel. If the count-input chan[...]

  • Page 10

    FP-CTR-502 and cFP-CTR-502 10 ni.com Noise Rejection Each count-input channel has a so ftware-enabled lo wpass f ilter that you can set to reject freque ncies abov e 200 Hz or 50 kHz. Select 200 Hz or 50 kHz from the V alue menu to configure noise rejection. The default is 50 kHz. Control Y ou can set the Control command to increment or reset by se[...]

  • Page 11

    © National Instruments Corp. 1 1 FP-CTR-502 and cFP-CTR-502 Output Mode For each output channe l select one of the follo wing output modes from the V alue menu : Toggle, Reset Off ; Toggle, Reset On ; On Pulse ; or Off Pulse . The output modes work only if you select Counter Channel 0 –7 for the Output Source . The follo wing sections describe t[...]

  • Page 12

    FP-CTR-502 and cFP-CTR-502 12 ni.com On Pulse In On Pulse mode, the output ch annel starts low and goes high when the terminal count is e xce eded. The output channel returns to low after one count. In Figure 9, the terminal count is 4. Figure 9. Output of a Channel Set to On Puls e Mode Off Pulse In Of f Pulse mode, the output ch annel starts high[...]

  • Page 13

    © National Instruments Corp. 1 3 FP-CTR-502 and cFP-CTR-502 Application Note: Generating a Contin uous Pulse T rain Y ou can use two [c]FP-CTR-502 count-input cha nnels and one output channel to generate a co ntinuous pulse train with a controllable duty cycle and period . The f irst count-input channel serves as a clock prescaler and di vides the[...]

  • Page 14

    FP-CTR-502 and cFP-CTR-502 14 ni.com 4. Set the Count Source of the pr escaler cou nter to the clock on which you want to base your pul se train. This can be the external counter input or one of the [c]FP-CTR-502 internal references. 5. Subtract 1 from the value that you w ant to divide the input clock by , and set the terminal c ount of the presca[...]

  • Page 15

    © National Instruments Corp. 1 5 FP-CTR-502 and cFP-CTR-502 T o determine the frequenc y of the output from the pulse counter , use the follo wing formula: where f pulse is the pulse counter output frequency f pre is the prescaler c ounter output frequency term pulse is the terminal count value for the pulse counter Step 3. Configure the Pulse T r[...]

  • Page 16

    FP-CTR-502 and cFP-CTR-502 16 ni.com Status Indicators Figure 12 shows the status indica tor LEDs on the [c]FP-CTR-502 . Figure 12. Status Indicators The [c]FP-CTR-502 has two green status LEDs, POWER and READY . After you install the [c]FP-CTR-502 onto a terminal base or backplane and apply po wer to the connected network module, the green POWER i[...]

  • Page 17

    © National Instruments Corp. 1 7 FP-CTR-502 and cFP-CTR-502 Follo w these guideli nes to ensure a safe total system. • The [c]FP-CTR -50 2 has a safety isolation barrier between the I/O channels and the inter-modu le commu nication b us. Th ere is no isolation between channe ls unless otherwise noted. If any of the channels on a module are wired[...]

  • Page 18

    FP-CTR-502 and cFP-CTR-502 18 ni.com Specifications The follo wing specif ications are typical for a range of – 40 to 70 °C unless otherwise noted. 1 Input Characteristic s Number of channels ... ........... ............ 12 (8 count, 4 gate) Input type ............ ...................... ........ 5–30 VDC sourcing , compatible with TTL devices[...]

  • Page 19

    © National Instruments Corp. 1 9 FP-CTR-502 and cFP-CTR-502 Maximum output current Per channel .......... ........... ........... . 1 A Across all channe ls .................. ... 4 A Output impedance ... .............. ........... . 0.12 Ω Output bandwidth ................. ............ 16 kHz for a cu rrent flow ≥ 3.2 mA Maximum of f-state l[...]

  • Page 20

    FP-CTR-502 and cFP-CTR-502 20 ni.com Shock and Vibration These specifications apply only to the cFP-CTR-502. NI recommends Compact FieldPoi nt if your application is subject to shock and vibration. Operating vibration, random (IEC 60068-2-64)....... ........... ............ 1 0 –500 Hz, 5 g rms Operating vibration, sinusoidal (IEC 60068-2-6).....[...]

  • Page 21

    © National Instruments Corp. 2 1 FP-CTR-502 and cFP-CTR-502 CE Compliance This product meets the essentia l requirements of applicable European Directi v es, as amended for CE Marking, as follo ws: Lo w-V oltage Directi v e (s afety). ..... ... 73/23/EEC Electromagnet ic Compatibility Directiv e (EMC) ... ........... ......... ........ 89/336/EEC [...]

  • Page 22

    FP-CTR-502 and cFP-CTR-502 22 ni.com Where to Go for Support For more information about settin g up the FieldPoint system, refer to these National Instruments documents: • FieldPoint network module user manual • Other FieldPo int I/O m odule operating instructions • FieldPoint terminal base and connector block operating instructions Go to ni.[...]