Tender For 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 ]