Both of these are SDM devices. Each SDM device that is connected to a data logger needs a different SDM address (that is, 0 through 15). All SDM devices connect to the CR1000’s 12V, G, C1, C2, or C3 terminals. Up to 15 SDM devices can be connected to one data logger.
For more information, see the Synchronous Devices for Measurement (SDMs) page.