The Relay has a 3×3 inventory that immediately ejects its contents to its stony output side whenever possible, either to a Pneumatic Tube or to the open. The Relay will not eject contents if its output face is blocked. The relay will jam if trying to connect the output to a Buildcraft Pipe. When the relay is jammed the red light on the sides of the stone face will light up.
The Relay has similarities to both the Transposer and the Ejector. Unlike the Transposer, it has an inventory, and can accept tube input from any side. Unlike the Ejector, it does not require any redstone signal to operate and will eject whole stacks at a time.
Unlike most of the Redpower machines, Relay can accept items from Buildcraft Pipes.
- Until version 1.103 of IC2, Miners couldn't output items to Relays. This version of IC2 is not yet included in TecnicPack.