1. A sudden Surge between two or more interconnecting circuits can damage expensive equipment. Electrical isolation
Designed to protect expensive equipment from these Voltage surges.
2. Some ASics (including transmitters and receivers) require different power supplies due to the distance between nodes.
This will increase the ground impedance, making it more likely that ground currents from other sources will enter the grounding wire of the line.
3. Isolating connections can reduce or even eliminate these problems. If the connection between different nodes in the system cannot be guaranteed
If the ground potential is within the common model envelope of the receiver, electrical isolation is required, as shown in the figure.
