The 6B21 current-output module accepts RS-485 command signals from a host computer and converts serial data to a 0-to-20 mA or 4-to-20 mA digitally programmable output current, isolated from the digital input. Fully compatible with other 6B modules and backplanes and designed for industrial command-and-control applications, it can drive actuators, valves, recorders, and indicators, providing computations and communications, current-output readback and preset default conditions. Read full article