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 Counter Unit - 2 No. B) Axle Detectors (each Set 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) Reset Relay Qna1k, 24v, 6f/6b - 1 No. F) Preparatory Pr Relay Qnn1, 24v, 6f/2b (dual) - 1 No. G) Clamp With Deflector Plates And Hardware - 4 No. H) Reset Box Model No.259a - 2 No. I) Surge Voltage Protection Device Mounted On Din 35 Rail- 2 No.