This module has to handle two crossing power districts, and may split the layout into up to four blocks.
The tracks are wired to allow easy addition of block detection, hence the loops on the centre connector block.
It has the full DCC aux bus, 16v bus and eight wire X-bus. It has connectors for all four routes.
Most internal connections are made with terminal blocks to make it easy to alter, repair and fault find.
The large grey cables are the screened X-bus cables, though with suitable connector adaptors it could carry any system's bus.
