Benefits and Features
Expands datalogger current/voltage output capability
Provides four independent current or voltage outputs
Drives remote current-loop display units
Retransmits measured values to industrial control systems that have current or high voltage inputs
Sends control signalsto valve controllers
Provides excitation voltages or currents to external sensors

Technical Description
The SDM-CVO4 includes four output channels for connecting the external devices. It outputs variable voltage or current signals under datalogger program control. The outputs are isolated both from the datalogger and the other channels on the SDM-CVO4, thereby avoiding ground loop problems. Each output can be set to 0 to 10 Vdcor 0 to 20 mA by the datalogger program (current outputs can also be scaled and limited to4 to 20 mA).
In the current mode, the output either acts as a two-wire current controller, where the loop is powered from a remote voltage source, or generates a 0 to 20 mA current source
using a voltage output derived from its own power supply.