6-9
4.2 Cabinet interior
The transformer and three Printed Circuit Boards are mounted on a plate inside the cabinet. The
top PCB (CPU-PCB) is covered with a protection plate, in which holes are made for USB,
Ethernet and RS232 connectors as well as the red 2 x LED digits. Also the Reboot pushbutton
and the DIP switches are accessible without removing the front plate. All connection terminals
are found on the two uncovered boards (IO- and PSU- PCB).
4.3 List of connections
Main power, 115 or 230 VAC (on PSU-PCB)
Term# Function Note
71 230 V AC L1
72 100 V AC (L1 if not 71 is connected)
73 N Neutral L2
74 Protective
round GND
Only one of the terminals 71 or 72 shall be connected. When powered from 230VAC, terminal
71-73-74 shall be used and the transformer connector shall be plugged into the 230 VAC
contact.
If powered from 100 VAC, terminal 72-73-74 shall be used and the transformer connector shall
be plugged into the 100 VAC contact.
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