The SDBU Distributor supplies power to a two-wire transmitter and converts the 10 to 50 mA DC or 4 to 20 mA DC transmitter (signal) current to two 1 to 5 V DC output signals. The current level can be selected by the internal switch. Isolation between input/output and distributor power supply is provided ("loop isolation"); isolation between input and output is also provided ("field isolation"). Current limiting (to protect against transmitter wiring short circuit) is provided, and a square root function is optional.