Bedienungsanleitung Campbell Manufacturing SDM-SW8A

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  • Campbell Manufacturing SDM-SW8A - page 1

    SDM-SW8A 8 Channel Switch Closure Module Revision: 7/07 Copyright © 1987-2007 Campbell Scientific, Inc. ...

  • Campbell Manufacturing SDM-SW8A - page 2

    Warranty and Assistance The SDM-SW8A SWITCH CLOSURE INPUT MODULE is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in m aterials and workmanship under norm al use and service for twelve (12) m onths from date of shipment unl ess specified otherwise. Bat teries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this ...

  • Campbell Manufacturing SDM-SW8A - page 3

    SDM-SW8A Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections. 1. Function ........................................................................ 1 2. Specifications .............................................................. 2 ...

  • Campbell Manufacturing SDM-SW8A - page 4

    SDM-SW8A Table of Contents List of Tables 1. Datalogger to SDM-SW8A Connections ................................................... 2 2. SDM-SW8A to SDM-SW8A Connections ................................................ 3 3. Address Jumpers ........................................................................................ 5 4. Measurement Jum ...

  • Campbell Manufacturing SDM-SW8A - page 5

    SDM-SW8A Switch Closure Input Module 1. Function The 8 channel SDM-SW8A Switch Closure Input M odule (see Figure 1) measures up to 8 channels of swit ch closure or voltage pulse input s. Each channel may be confi gured to read single-pole double-throw (SPDT) swi tch closure, single-pole single- throw (SPST) switch closure, or voltage pulse. Output ...

  • Campbell Manufacturing SDM-SW8A - page 6

    SDM-SW8A Switch Closure Input Module 2. Specifications Operating voltage: 12 VDC nominal (9.6 to 16) Current drain: 3 mA quiescent, 6 m A active (max) Environmenta l: -25 to +50 o C, 0 to 90% RH, noncondensing Measurement types: Switch closure (SPDT, SPST) DC voltage pulse Input voltage threshol d: From below 0.9 to above 4.0 VDC ,±20 VDC max Maxi ...

  • Campbell Manufacturing SDM-SW8A - page 7

    SDM-SW8A Switch Closure Input Module TABLE 2. SDM-SW8A to SDM-SW8A Connections SDM-SW8A SDM-SW8A that’s connected to a CR10(X), CR800, CR850, CR1000, CR23X, CR3000, CR5000, or CR7 SDM-SW8A that’s connected to a 21X +12 12 V +12 C3 C3 C3 C2 C2 C2 C1 IN C1 IN C1 IN C1 OUT not used (see Note 2) C1 OUT (see Note 3) Notes: (1) If using an auxiliary ...

  • Campbell Manufacturing SDM-SW8A - page 8

    SDM-SW8A Switch Closure Input Module 4. Connections All connections to the dat alogger, power supply, and other SW8As are made from term inals located under "TO DATALOGGER" on the SW8A (refer to Figure 1). Sensor connections are ma de at the remaining t erminals. 4.1 Connections to Dataloggers and Other SW8As Connections between an SW8A a ...

  • Campbell Manufacturing SDM-SW8A - page 9

    SDM-SW8A Switch Closure Input Module TABLE 3. Address Jumpers Pins Address 1-8 2-7 3-6 4-5 00 c c c c 01 c c c nc 02 c c nc c 03 c c nc nc 10 c nc c c 11 c nc c nc 12 c nc nc c 13 c nc nc nc 20 nc c c c 21 nc c c nc 22 nc c nc c 23 nc c nc nc 30 nc nc c c 31 nc nc c nc 32 nc nc nc c 33 nc nc nc nc c = connected nc = not connected FIGURE 2. SDM-SW8A ...

  • Campbell Manufacturing SDM-SW8A - page 10

    SDM-SW8A Switch Closure Input Module 5.2 Measurement Jumpers Near each input channel is a jumper trip let used to configure the channel for the measurement type. The SDM-SW8A is shipped from the factory with each channel configured for DC Voltage pulse. An example of each configuration is illustrated in Figure 2. Table 4 shows jumper pins and the c ...

  • Campbell Manufacturing SDM-SW8A - page 11

    SDM-SW8A Switch Closure Input Module Parameter & Da t a T y pe Enter FunctOp Constant The FunctOp is used to determine the result that will be retu rn ed by the SW8A. Numeric Code Function 0 Returns the state of the sig nal at the time the instruction is executed. A 0 is stored for low and a 1 is stored for high. 1 Returns the duty cycle of th ...

  • Campbell Manufacturing SDM-SW8A - page 12

    SDM-SW8A Switch Closure Input Module Instruction 102 is not contai ned in all CR10 or 21X PROM S. To verify that the datalogger cont ains the Instruction, enter 102 i nto a datalogger Programming Table. If the Instruction is accepted, the PROM contains the Instruction. NOTE Repetitions (Reps, Parameter 1 ) specifies the number of SW8A channels to r ...

  • Campbell Manufacturing SDM-SW8A - page 13

    SDM-SW8A Switch Closure Input Module 7. Datalogger Program Details 7.1 Datalogger Scan Rate The Module samples channel state every 2 ms and accum ulates the information for duty cycle and counts. Each channel has one 16 bit accumulator for duty cycle and one for counts. The accumula tors are reset when the datalogger requests information from the S ...

  • Campbell Manufacturing SDM-SW8A - page 14

    SDM-SW8A Switch Closure Input Module forces a watchdog reset by addressing the Modul e and requesting sufficient information t o cause a minim um of 65 clock li ne transitions. Advantages to the trapping routine are: • The bombed processor is detect ed before erroneous values (-99999) are included in subsequent processing. • T he processor may ...

  • Campbell Manufacturing SDM-SW8A - page 15

    SDM-SW8A Switch Closure Input Module 8.2 SPST Switch Closure Single-pole single-throw swit ches are either open (high state) or connected t o ground (low state). Typical SPST switc hes include contact closure (reed switch) anemom eters, tipping bucket rain gauges, and open collectors (semiconductor switches). Many contro l devices utilize open coll ...

  • Campbell Manufacturing SDM-SW8A - page 16

    SDM-SW8A Switch Closure Input Module 50% Duty Cycle - The "worst case" duty cycle m easurement error for a 50% duty cycle at a given i nput frequency is ± ERROR = Hz * 0.4 where ERROR = Actual Duty Cycle ± Measured Duty Cycle. For example, a 50% duty cy cle at 10 Hz could be measured as 46% t o 54% in the worst case. Minimum/Maximum - T ...

  • Campbell Manufacturing SDM-SW8A - page 17

    SDM-SW8A Switch Closure Input Module addressed SW8A is present. The 21X works similarly, except the data from the SW8A is input to single ended analog channel 1, not C1. Depending on the Comm and, Reps, and Ch annel information, the module will shift out one or more by tes to the datalogger, again usi ng C2 as a clock driven by the datalogger. The ...

  • Campbell Manufacturing SDM-SW8A - page 18

    SDM-SW8A Switch Closure Input Module This is a blank page. 14 ...

  • Campbell Manufacturing SDM-SW8A - page 19

    Appendix A. Program Example The Edlog program is an exam ple only and is not meant to be used verbati m. In application, the co ncepts illustrated here are likely to be only fragments of a larger program. The example program reads all 8 ports of an SW8A which is set t o address 00. It is read three times per scan, once each for State, Duty Cycle, a ...

  • Campbell Manufacturing SDM-SW8A - page 20

    Appendix A. Program Example FIGURE A-1. Example Program Flow Chart PROGRAM EXAMPLE Input Locations Used: 1:STATE #1 13:DUTY #5 2:STATE #2 14:DUTY #6 3:STATE #3 15:DUTY #7 4:STATE #4 16:DUTY #8 5:STATE #5 17:COUNT#1 6:STATE #6 18:COUNT #2 7:STATE #7 19:COUNT #3 8:STATE #8 20:COUNT #4 9:DUTY #1 21:COUNT #5 10:DUTY #2 22:COUNT #6 11:DUTY #3 23:COUNT # ...

  • Campbell Manufacturing SDM-SW8A - page 21

    Appendix A. Program Example *Table 1 Programs 01: 1 Sec. execution interval 1: Do (P86) 1: 1 Call Subrout ine 1 If SDM-SW8A was just programmed or its processor is bombed, set intermediate processing disabl e flag. 2: 1 If Flag/Port (P9) 1: 21 Do if flag 1 is low 2: 19 Set high Flag 9 3: If X<=>F (P89) 1: 1 X Loc state #1 2: 4 < 3: 0 F 4: ...

  • Campbell Manufacturing SDM-SW8A - page 22

    Appendix A. Program Example 10: Do (P86) 1: 1 Call Subrout ine 1 11: Z=Z+1 (P32) 1: 25 Z Loc [:RESET CNT] 12: Do (P86) 1: 10 Set high Flag 0 (output) 13: Real Tim e (P77) 1: 110 Day,Hour-M inute 14: Sample (P70) 1: 1 Reps 2: 25 Loc RESET CNT 15: Do (P86) 1: 21 Set low Flag 1 ********** FIRST SCAN ROUTINE ********** 16: Else (P94) 17: Do (P86) 1: 11 ...

  • Campbell Manufacturing SDM-SW8A - page 23

    Appendix A. Program Example 3: SDM-SW8A (P102) 1: 8 Reps 2: 00 Address 3: 1 Duty cycle funct ion 4: 1 Chan 5: 9 Loc [:duty #1 ] 6: 1 Mult 7: 0 Offset 4: SDM-SW8A (P102) 1: 8 Reps 2: 00 Address 3: 2 Counts function 4: 1 Chan 5: 17 Loc [:counts #1] 6: 1 Mult 7: 0 Offset 5: End (P95) 6: End Table 3 A-5 ...

  • Campbell Manufacturing SDM-SW8A - page 24

    Appendix A. Program Example This is a blank page. A-6 ...

  • Campbell Manufacturing SDM-SW8A - page 25

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  • Campbell Manufacturing SDM-SW8A - page 26

    Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 Nort h Logan, Utah 84 321 UNITED STATES www.campbellsci.com info@campbellsci.com Campbell Scientific Afri ca Pty. Lt d. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za cleroux@csafrica.co.za Campbell Scientific Aust ralia Pty. Ltd. (CSA) PO Box 444 Thu ...

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