English dropdown-ico

Campbell Manufacturing SDM-SW8A manual

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

Go to page of

Similar user manuals

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of Campbell Manufacturing SDM-SW8A, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Campbell Manufacturing SDM-SW8A one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of Campbell Manufacturing SDM-SW8A. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of Campbell Manufacturing SDM-SW8A should contain:
- informations concerning technical data of Campbell Manufacturing SDM-SW8A
- name of the manufacturer and a year of construction of the Campbell Manufacturing SDM-SW8A item
- rules of operation, control and maintenance of the Campbell Manufacturing SDM-SW8A item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Campbell Manufacturing SDM-SW8A alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Campbell Manufacturing SDM-SW8A, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Campbell Manufacturing service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Campbell Manufacturing SDM-SW8A.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the Campbell Manufacturing SDM-SW8A item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • Page 1

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

  • 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 [...]

  • 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[...]

  • 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 [...]

  • 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 [...]

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • Page 18

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

  • 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[...]

  • 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 #[...]

  • 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: [...]

  • 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[...]

  • 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[...]

  • Page 24

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

  • Page 25

    This is a bl ank page .[...]

  • 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[...]