Signal Isolation - It eliminates all forms of operating disturbances.
It protects your PLC / DCS input and output cards.
Applications of signal isolation are
1.Signal adaption and scaling of process value.
3. Electrostatic filtration.
4.Elimination of ground loops
5.Protect against EMC
A signal isolator in the process loop blocks ground current to restore signal accuracy and reliability.
Isolators are available in two and four wire version.Four wire type requires a separate power source.