The SDM-CVO4 is a four-channel device capable of outputting either a voltage signal (0 to 10 V) or a current signal (0 to 20 mA). The signal level is under datalogger program control, typically by Program Instruction 103 (also used for the SDM-AO4). Typical applications are driving remote "current loop" display units, retransmitting measured values to industrial control systems that have current or voltage inputs, sending control signals to valve controllers, and providing excitation voltages or currents to external sensors which cannot be excited directly by a datalogger.
