supply of supply of master controller for eot cranes type cm4/sr/dh/6.supply of master controller for eot cranes type cm4/sr/dh/6.,supply of master controller for eot cranes type cm4/sr/dh/6. it should provide 4 steps each in both forward and reverse directions. they should be equipped with spring return arrangement and dead mans handle (with dead man switch). ip-44 /ip-54,horizontal mounting ,contact material-silver cadmium, ra ted voltage-500v,10a,frequency of operation - 1000 switching per hour accepted make:- speed o controls, srp crane controls, gunatit electropower, gujarat anand systems engineering [ warranty period: 30 mon ths after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]