Delta Redundant PLC AH500: Strengthening the “zero interruption” operation defense line of tunnel monitoring system
The monitoring system of a separated long tunnel in East China (with two-way four lanes, a single tunnel line length of over 7,500 meters, and a designed speed of 80km/h) has been upgraded and renovated to the standard of an intelligent operation and maintenance center. The system controller is required to have multiple capabilities such…