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 ] ]