supply of high availability single section digital axle counter system complete with dual sensor, as per rdso specification no. rdso / spn / 177 / 2012, version-3 or latest. consisting of:- ( i ) track side high availability digital axle counter unit dacf - 720p - 2 nos. ( ii ) high frequency tx coil and rx coil ( ad-711 ) ( each set consists of web mounting type 2 nos. tx coil and 2 nos. rx coil ) . ( iii ) vital relay box model vr-722 - 2 nos. duly wired with following relays: a ) vital relays qna1k, 24v, 6f / 6b - 2 nos. b ) reset relays qna1k, 24v, 6f / 6b - 1 no. c ) pr relay qnn1, 24v, 6f / 2b ( dual ) - 1 no. ( iv ) clamp with deflector plates and hardware - 4 nos. ( v ) reset box model no.259a - 2 nos. ( vi ) surge voltage protection device mounted on din rail - 2 nos. [ warranty period: 30 months after the date of delivery ]