Synchronous Devices for Measurement
Expand your output and measurement capabilities
SDM-AO4A Analog Output Module
The SDM-AO4A module increases the number of continuous analog outputs available to a datalogger. These outputs are used for proportional control or driving strip charts.
SDM-CAN Datalogger-to-CANbus Interface
The SDM-CAN allows a Campbell Scientific datalogger to sample data directly from a CANbus communication network. This allows testing and verification of CANbus-based data alongside...
SDM-CVO4 Current/Voltage Output Module
The SDM-CVO4 is attached to a datalogger and outputs variable voltage or current signals under datalogger program control. Typical applications include driving remote current-loop display...
SDM-CD16AC AC/DC Relay Controller
The SDM-CD16AC allows a Campbell Scientific datalogger to automatically activate external AC or DC devices such as motors, pumps, heaters, valves, and fans.
SDM-CD16D Digital Control Port Expansion Module
The SDM-CD16D increases the number of digital outputs that can be controlled by a Campbell Scientific datalogger. The SDM-CD16D is commonly used to drive normal...
SDM-CD8S Solid-State dc Controller
The SDM-CD8S adds capability to a datalogger by controlling dc devices that have a moderate current load, such as solenoids, solenoid valves, dc motors, stepper...
SDM-CD16S Solid State DC Relay Controller
The SDM-CD16S adds capability to a datalogger by controlling DC devices that have a relatively high-powered load, such as solenoids, solenoid valves, DC motors, stepper...
SDM-INT8 8-Channel Interval Timer
The SDM-INT8 outputs timing data to a Campbell Scientific datalogger. The datalogger can process the timing data to calculate RPM, duty cycle, velocity, crank angle,...
SDM-IO16 Input/Output Expansion Module
The SDM-IO16 expands the digital input and output capability of Campbell Scientific dataloggers. It offers similar functionality to the control ports of our CR10X and...
SDM-SIO1 Serial Input/Output Module
The SDM-SIO1 expands the number of serial devices that can communicate with a CR800, CR850, CR1000, or CR3000 datalogger. You can attach up to 15...
SDM-SIO4 Serial I/O Interface
The SDM-SIO4 adds capacity and flexibility to a datalogger. It has four serial ports that communicate with intelligent serial sensors, display boards, printers, satellite links,...
SDM-SW8A 8-Channel Switch Closure Input Module
The SDM-SW8A increases the number of switch closures or voltage pulses a datalogger can measure. Sensors that output a switch closure or voltage pulse signal...
SDM Accessories
These accessories include the cable used to connect the SDMs to a datalogger and hubs that make it more convenient to connect multiple SDMs.
Resources and Links
About Synchronous Devices for Measurement
Synchronous Devices for Measurement (SDMs) are a group of addressable peripherals that expand the datalogger's output and measurement capabilities. The datalogger controls the SDM output device by storing a value in a memory location, which is then used by the SDM to set a voltage or relay. Measurement devices store data from sensors which are regularly read into the datalogger through a control port.
A datalogger compatibility table is provided in the SDM Overview.
FAQs for
The CR200X-series and the retired CR200-series dataloggers are NOT compatible with SDMs or multiplexers. If you need more channels or might need more channels in the future, you should probably purchase a CR800, CR850, or CR1000 instead.
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