Benefits and Features
Allows the data loggerto automatically turn devices on or off when a threshold (for example, temperature or water depth) has been reached
Includes LEDs that indicate when a port is active
Provides a manual override for each port
UL/CUL approved product
Addresses up to 15 SDM-CD16 ACAs, allowing up to 240 ports to be controlled by one datalogger

Technical Description
The SDM-CD16ACA has a toggle switch that provides three positions: ON and OFF for manual override, and AUTO for data logger control.
Inthe ON position, the common (COM) and normally open (NO) contacts are closed.
In the OFF position, the normally open contact is open.
In the AUTO position, the state of the relay is controlled by the SDM command issued through the data logger's control ports or SDM terminal.