supply of dc power converter / charging unitdc power converter / charging unit,dc-dc power converter (smps ) 110 volt to 27.4 volt as per sanrok part no. 2ed-255-2000 for fire detection system make- sa nrok [ warranty period: 30 months after the date of delivery ] ] , power unit panel to sanrok make part no: 2ed-254-1930 to automatic smoke/ fire detection with alarm system as per rdso specification no. rdso/2008/cg-04. rev-06. acceptable make: sanrok only. note: 1) the firm should submit authorized dealership certific ate or proof of purchase from oem or dealer [ warranty period: 30 months after the date of delivery ] ] , g union (straight connector) 12-l (m18x1.5) v4a stainless steel including nuts- g12l71. suitable for automatic/manual fire/smoke detection c um suppression system installed in power car. similar to sanrok part - 2ed-245-1870. [ warranty period: 30 months after the date of delivery ] ] , charging unit to sanrok part no. 2ed-254-3523 for automatic smoke/fire detection with alarm system for ac coaches as per rdso spec n o. rdso/2008/cg-04 (rev-6) or latest. [ warranty period: 30 months after the date of delivery ] ]