From Valkyrien Skies
Description: "Lets you connect 8 (by default) components, including relays, to this using Relay Wire."
pic of it placed down
A Network Relay will relay Signals, expanding a control Network.
You connect Components to it by right-clicking them and the Relay with Relay Wire. Currently, you must break the relay to get the Wires back and break the connections. A Wire Cutters type item has been suggested before and may be in the works.
pic of it with lots of wires