supply of 24v dc relay fail safe electronic time delay device for railway signalling with fixed timing (0-60) seconds.24v dc relay fail safe electronic time delay device for railway signalling with fixed timing (0-60) seconds.,24v dc relay fail safe electronic time delay device for railway signalling with fixed timing (0-60) seconds and conforming to specification no. irs:s-61/2000 with amd.3 or latest mounted on q-serie s relay base & covered complete with connectors, retaining clip etc. the interlocking code for this unit shall be afhky. as per attached annexure. [ warranty period: 30 months after the date of delivery ] ]