Contents

Revision and Copyright Information
Warranty and Assistance
Table of Contents
SDM-CD16S 16 Channel Solid State DC Control Module
- 1. Function
- 2. Specifications
- 3. Power Considerations
- 4. Installation
  - 4.1 Wiring
    - 4.1.1 SDM-CD16S Power and Control Connections
    - 4.1.2 Controlled Device Connections
- 5. Address Selection Switch
- 6. Datalogger Instructions
  - 6.1 CRBasic Dataloggers (CR800, CR850, CR1000, CR3000, CR5000, CR9000(X))
  - 6.2 Datalogger Instructions 104 (CR10/10X, CR23X, 21X, CR7) and 29 (older CR7s)
- 7. Theory of Operation
- 8. Program Examples
  - 8.1 Control Temperature and Fans CR1000
  - 8.2 Control Temperature and Fans CR10X
  - 8.3 Control Gas Sampling Based on Time CR1000
    - 8.3.1 Terminology
    - 8.3.2 Data Tables
    - 8.3.3 Initialization Section (between BeginProg and Scan)
  - 8.4 Control Gas Sampling with Timing in Measurement Task CR1000
    - 8.4.1 The Purpose of this Example
    - 8.4.2 Pipeline vs Sequential
    - 8.4.3 TimedControl Instruction
    - TimedControl(Size,Sync_interval, Interval_Units,Default_Value, Index_dest, Source_Array, ClockResetOpt)
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Campbell Scientific SDM-CD16S Instruction Manual

Campbell Scientific SDM-CD16S Module manual cover

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Campbell Scientific SDM-CD16S Module Specification

The Campbell Scientific SDM-CD16S is a sophisticated digital control module designed to expand the output capabilities of data acquisition systems. It provides 16 individually controlled digital outputs, which can be used to manage a variety of devices such as solenoids, relays, and lights. Each output is capable of sinking up to 1 ampere of current, making it suitable for controlling high-power devices directly. The module interfaces seamlessly with Campbell Scientific dataloggers via the SDM (Synchronous Device for Measurement) protocol, allowing for precise and coordinated control operations. The SDM-CD16S is designed for robust performance in harsh environments, featuring a wide operating temperature range from -25°C to 50°C, which ensures reliability in diverse field conditions. The module supports a voltage range of 12 to 16 volts DC, offering flexibility in power supply options. It also includes LED indicators on each channel, providing visual status updates of the output states, which simplifies troubleshooting and monitoring. The unit is encased in a durable, weather-resistant enclosure, ensuring protection against environmental elements. With its compact design, the SDM-CD16S can be easily integrated into field installations without requiring significant additional space. Its synchronization capability with other SDM devices enables complex control sequences and system scalability. The module's user-configurable options and compatibility with Campbell Scientific's CRBasic programming language provide extensive customization potential, making it a versatile tool for various data acquisition and control applications. This makes the SDM-CD16S an essential component for researchers and engineers seeking to enhance their data collection systems with reliable and efficient digital control capabilities.

Campbell Scientific SDM-CD16S Module F.A.Q.

What is the purpose of the Campbell Scientific SDM-CD16S Module?

The SDM-CD16S Module is used for controlling DC devices, such as motors or valves, and can also be used for reading the status of DC logic or voltage levels.

How do I connect the SDM-CD16S to a data logger?

Connect the SDM-CD16S to the data logger using the SDM cables, ensuring that the data, clock, and enable lines are correctly wired. Refer to the module's wiring diagrams for specific details.

What troubleshooting steps should I take if the module is not responding?

Check all connections for tightness and proper configuration, verify that the power supply is sufficient, inspect the program in the data logger, and ensure that the SDM address is correctly set.

Can the SDM-CD16S handle AC loads?

No, the SDM-CD16S is designed for DC loads only. Attempting to control AC loads can damage the module.

How can I check the status of the outputs on the SDM-CD16S?

The status of the outputs can be read back to the data logger using the appropriate commands in the logger's program. Refer to the instruction manual for specific commands.

What maintenance is required for the SDM-CD16S?

Routine maintenance includes checking for loose connections, ensuring the device is free from dust and debris, and verifying that all settings remain correct.

Is it possible to use multiple SDM-CD16S modules with a single data logger?

Yes, multiple SDM-CD16S modules can be used with a single data logger. Each module should have a unique SDM address to ensure proper communication.

What is the maximum current rating for each output on the SDM-CD16S?

Each output on the SDM-CD16S can handle a maximum current of 2 A. It is important not to exceed this limit to avoid damaging the module.

How do I set or change the SDM address for the module?

The SDM address is set using the DIP switches on the module. Refer to the user's manual for the specific settings corresponding to each address.

What should I do if an output is stuck in the ON position?

Check the program in the data logger for errors, inspect the wiring for shorts or faults, and reset the module by cycling the power. If the issue persists, further diagnostics may be required.