Overview of the board - input and power connector on the front

Power led and, on the right, three of the eight monitor leds (one per channel)

The green connector accept power input and provides 12 Volt and 5 Volt 200 mA stabilized output

All ICs are mounted on sockets to ease maintenance - diodes protecting the inputs are clearly visible.
Jumpers on the left are used to connect input grounds or leave them floating.