Supply Of High Availability Single Section Digital Axle Counter (Hassdac) System Complete As Per Rdso Specification Rdso/Spn/ 177/2012 Ver. 3.0 Or Latest. The System Shall Consist Of The Following: A)Track Side High Availability Digital Axle Er Unit - 2 No. B) Axle Detectors (Each Consists Of Web Mounting Type 2 No Tx Coils And 2 Numbers Rx Coils) - 2 Sets C) Vital Relay Box - 2 Numbers. Each Box Shall Be Wired With Following Relays. D) Vital Relay Qna1K, 24V, 6F/6B - 2 No. E) Rer