supply of dc-dc converterdc-dc converter,dc-dc converter, input voltage 110 v dc (67.5-154 v ) 2.5 a,output voltage 24 v dc 4.5-5 a it should be same size and design suitable to be fitted in automatic fire & smoke detection system in ac lh b & icf coaches as per rdso spec no. rdso/2008/cg-04/rev-06 accepted make mean well model no.ddr -120d-24 ,monsun, lubi or similar. [ warranty period: 12 months after the date of delivery ] ] , dc-dc converter, input voltage 96 v dc (72-144 v ) 1.8 a ,output voltage 24 v dc 4.2 a it s hould be same size and design suitable to be fitted in automatic fire & smoke detection system in ac lhb & icf coaches as per rdso spec no. rdso/2008/cg-04/rev-06 accepted make mean well model no sd-10 0d-24 or similar charging unit to sanrok part no. 2ed-245-4985 for automatic fire detection cum suppr ession system. [ warranty period: 12 months after the date of delivery ] ] , battery charger unit/ dc ups module, input voltage 24-29 v dc 40 a, output 0-40 a it should be same size and design suitable to be fitted in automatic fire & smoke detection system in ac lhb & icf c oaches as per rdso spec no. rdso/2008/cg-04/rev-06 . accepted make mean well model no. dups40 or similar [ warranty period: 12 months after the date of delivery ] ] => limited