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Related Manuals for Campbell SDM-CD16ACA
Summary of Contents for Campbell SDM-CD16ACA
- Page 1 Revision: 04/2022 Copyright © 1987 – 2022 Campbell Scientific CSL I.D - 398...
- Page 2 Quotations for repairs can be given on request. It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment, in support of this policy a “Declaration of Hazardous Material and Decontamination”...
- Page 3 About this manual Please note that this manual was originally produced by Campbell Scientific Inc. primarily for the North American market. Some spellings, weights and measures may reflect this origin. Some useful conversion factors: Area: 1 in (square inch) = 645 mm Mass: 1 oz.
- Page 4 • Periodically (at least yearly) check electrical ground connections. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS...
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Page 5: Table Of Contents
Table of contents 1. Introduction 2. Control specifications 3. Power considerations 4. Installation 4.1 Wiring 4.1.1 SDM-CD16ACA power and control connections 4.1.2 Controlled device to SDM-CD16ACA connections 4.1.3 Motor control 5. Address selection switches 6. Data logger programming 6.1 CRBasic programming 6.1.1 SDMCD16AC() instruction... -
Page 6: Introduction
The SDM-CD16ACA is a synchronously addressed data logger peripheral. Three ports on the data logger are used to address the SDM-CD16ACA, then clock out the desired state of each of the 16 control ports. Up to 15 SDM-CD16ACAs may be addressed, making it possible to control a maximum of 240 ports from the three data logger ports. -
Page 7: Control Specifications
(@ 120 VAC, pilot duty), 3 A (@ 240 VAC, resistive) Coil voltage: 11 to 18 VDC Coil resistance: 360 Ohms ±10% Expected life (contact closures): Mechanical 10 Actuation/release time: Approx. 4 ms Standards: Underwriters Laboratories (UL) listed product (E162021) Canadian Underwriters Laboratories (CUL) listed product (5Z21) SDM-CD16ACA 16 Channel AC/DC Controller... -
Page 8: Power Considerations
[p. 3]). For long-term applications, the lead acid power supply available with Campbell Scientific data loggers should be used, allowing the batteries to be float charged. It is not recommended that the data logger alkaline supply be used to power the SDM-CD16ACA for long-term applications due to its large power requirements. -
Page 9: Installation
A 0.3 m (1 ft) cable length should be sufficient when both data logger and SDM-CD16ACA are housed within an ENC12/14; a 0.6 m (2 ft) length may be required if the data logger and SDM-CD16ACA are housed at opposite ends of an ENC16/18 enclosure. -
Page 10: Wiring
Refer to Figure 3-1 (p. 3) and Table 4-1 (p. 5) for SDM-CD16ACA operating power and control connections to the data logger. Table 4-1: Data logger to SDM-CD16ACA connections (see caution) Data Logger Connection Order SDM-CD16ACA Function (see notes) 12 V on data logger or... -
Page 11: Motor Control
(OFF) Figure 4-1. Switch operation In most applications, the SDM-CD16ACA acts as a switch (controllable break) in one wire of the circuit powering the controlled device. One side of this break may have power (hot). Figure 4-2 (p. -
Page 12: Address Selection Switches
Figure 4-3. SDM-CD16ACA relay outputs to MCC 5. Address selection switches Each SDM-CD16ACA can have 1 of 15 addresses (0 to 14). Address 15 is reserved for the SDMTrigger() instruction. Shipped from the factory, the address is set at 00. The following... -
Page 13: Data Logger Programming
Figure 5-1. Addressing 6. Data logger programming SDMCD16AC() In CRBasic, the instruction is used to control the SDM-CD16ACA. Data loggers that are programmed with CRBasic include the CR6, CR3000, CR1000X, CR800, CR850, and SDMSpeed() CR1000. The instruction should also be used if the cable length is longer than 20 ft. -
Page 14: Crbasic Programming
Syntax SDMCD16AC(Source, Reps, SDMAddress) Remarks A port on an SDM-CD16ACA is enabled/disabled (turned on or off) by sending a value to it using SDMCD16AC() instruction. A non-zero value will enable the port; a zero value disables it. The values to be sent to the CD16AC are held in the Source array. -
Page 15: Theory Of Operation
The data logger shifts out a data bit on C1 (LSB first) on the falling edge of the C2 clock. The SDM-CD16ACA shifts in the C1 data bit on the rising edge of the C2 clock. The first 8 bits clocked out represent the SDM-CD16ACA address. If the address matches the SDM-CD16ACA address, the SDM-CD16ACA is enabled. -
Page 16: Program Examples
SDM-CD16ACAs, controlling temperature and fans in greenhouses, and using an integer instead of an array to set the SDM-CD16ACA control outputs. While the programs are written for the CR1000X, they will work with other Campbell Scientific data loggers with little or no modification. - Page 17 Program SDM-CD16AC_integer-set-control.dld: the actual value used CD16_Output as Long to control SDMCD the CD16_Output bits set the SDM-CD16ACA ports. bits 0 to 4 are for ‘Heat, 5 to 9 are for Cooling, 10 to 14 are for Fans Program SDM-CD16AC_greenhouse-control.dld uses an array of values to set the SDM-CD16ACA control outputs.
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