supply of 24v dc relay fail safe electronic time delay device24v dc relay fail safe electronic time delay device,supply of 24v dc relay fail safe electronic time delay device for railway signalling with fix ed timing (0-120) seconds and conforming to specification no. irs:s-61/2000 amd.3 or latest mounted on q-series relay base & covered complete with connectors, retaining clip etc. the interlocking code for this u nit shall be afgky. [ warranty period: 30 months after the date of delivery ] ] , supply of 60 second fail safe electronic time delay q series relay, plug in type, working ove r 24v dc, complete with plug board, retaining clip and connectors conforming to specification no. irs:s-61/ 2000 with amd.3 or latest. the interlocking code for this unit shall be afhky. [ warranty period: 30 mont hs after the date of delivery ] ] => limited