Preparation

Check that all parts are there:

Pcs.	Part
2	M3 hex-spacer, nylon, 15mm
2	M3 hex-spacer, nylon, 18mm
4	M3 screw
8	relay
8	3mm LED, green
1	3mm LED, red
8	tactile push button, xx mm
1	tactile push button, xx mm
1	DIN Rail enclosure, consisting of: black bottom white case white front panel 5 pcs terminal guards for screw terminals 1 pcs KNX cover 1 pcs terminal guard for heat-flow 1 pcs terminal guard, closed
1	MiniUSB socket, vertical
2	micromatch socket, 2x3 pin
1	micromatch socket, 2x8 pin
1	micromatch socket, 2x4 pin
2	micromatch plug, 2x3 pin
1	micromatch plug, 2x8 pin
1	micromatch plug, 2x4 pin
1	pcs of flat cable
1	PCB enclosure cover, printed and drilled

Controller