The Status SEM1020 is a current loop isolator to provide extra drive capability from an existing current loop.
It requires power supply connections on both the input and output terminals. If true isolation is to be maintained, the two power supplies used must be fully isolated from each other.
The input circuitry on the SEM 1020 only drops 2.7 V from the existing current loop and providing a 24 VDC isolated power supply is used on the output side, the isolator will drive up to 900 ohms.
Fully adjustable span and zero with a DIN rail mount