Voltage-to-Current Isolator Also Supplies Loop Power

1B22 Provides 1,500-Vrms Isolation in Small Package at Low Cost; Output is 4-to-20 mA or 0-to-20 mA with 28-VDC Compliance

The 1B22 voltage-to-current converter provides current output for process-control applications that require electrical isolation between a signal source (e.g., a programmable controller) and a load (e.g., a valve or actuator). It is functionally similar to the 1B21 voltage-to-current converter (Analog Dialogue 22-1), with one major difference: the 1B22 supplies the power for the output loop via its own isolated, internal dc/dc converter. Read full article