Relays continue to be useful and popular, but in low-power, battery operated applications they tend to be power wasters. The following relay economy circuits reduce coil power significantly by simply ...

The Machine Primary Control Elements (MPCE) 1 and 2 are typically a relay with force guided contacts. When a safety interlock, light curtain, or e-stop switch opens a circuit, the MPCE NO contacts ...

The railways made a switch to a modern signalling system from the earlier route relay interlocking to ensure safe operations, but it seems to have backfired During the 63-hour mega block from May 31 ...

The modern electronic interlocking system will be installed at all the remaining stations in the future," said SECR officials. This project is being carried out under the principal chief signal and ...