It insulates the noise, surge, etc., entering from {HEAD ~ the sensor} from {TAIL ~ the central monitoring panel} 
from
It insulates the noise , surge , etc . , entering from { HEAD ~ the sensor } from { TAIL ~ the central monitoring panel }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL