An economically smart pre-configured programmable transmitter relay with isolated 4 to 20 mA retransmission or control loop output capability for measurement and control applications. DIN rail mounted. 4-20mA Isolator. The TL-4-20mA includes an analog output in the base price. The 16-bit OIC and OIV modules provide outputs of 4-20mA current or 0-10V DC voltage and can be selected under "Analog Outputs".