supply of public announcement module, sanrok part no.-2ed-254-3520. this is pac items of sanrok enterprise.bidders offer: public announcement module, sanrok part no.-2ed-254-1929 / 4 [ warranty period: 30 months after the date of delivery ] , dc-dc convertor 110v to 24 v, sanrok part no.-2ed-254-3521. this is pac items of sanrok enterprise. bidders offer: dc-dc convertor 110v to 24 v, sanrok part no.-2ed-254-1930 / 1 [ warranty period: 30 months after the date of delivery ] , brake module to sanrok part no. 2ed-254-4387 for automatic smoke / fire detection with alarm system. [ warranty period: 30 months after the date of delivery ] , electrical voice message sounder as per sanrok part no. 2ed-254-1940 for fire system in ac, pantry, power car. [ warranty period: 30 months after the date of delivery ] , relay communication card for vesda, as per sanrok part no. 2ed-254-1929 / 3 for fsds system in ac, pantry and power car. firms accepted offer: relay communication card for vesda, as per sanrok part no. 2ed-255-4974 for fsds system in ac coaches which will meet railway requirement. make: sanrok [ warranty period: 30 months after the date of delivery ] , brake application valve, sanrok part no.-2ed-255-1971. a. magnet valve to kbi part no. 188808 / 024 b. pilot valve to kbi no. 198868 this is pac items of sanrok enterprise. [ warranty period: 30 months after the date of delivery ] , main control unit for fire detection & suppression system in lhb coaches as per sanrok part no. 2ed-245-1902 and as per rdso specification - rdso / 2013 / cg-06 rev 00 dated june 2014. [ 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. [ warranty period: 30 months after the date of delivery ]