Benefits and Features
Intended for low-voltage, low-power applications not suitable for the SDM-CD16AC

Technical Description
The SDM-CD16D increases the number of digital outputs that can be controlled (i.e, set to 0 or 5V) by a Campbell Scientific datalogger. In addition to being able to drive normal logic level inputs, when an output is set HI, a boost circuit allows it to source a current of up to 100 mA for controlling low voltage valves, relays, or other devices.
Up to 15 SDM-CD16Ds may be addressed, making it possible to control a maximum of 240 ports from the first three datalogger control ports.