V/D
S
ERIES
E
LECTRICAL ASSEMBLIES
Revision: 2.1 4-21
4.2.3 Digital circuit board
The main controller (processor) is located on the digital circuit board. The
device software is stored here.
Fig. 21: Digital circuit board on the D-23
1 JP1 Power supply for control unit
2 JP8 Power supply and communication to analogue circuit board (D-23)
3 JP2 Interface connector
4 JP9 Control unit
5 JP3 Selector for interface protocol RS-232 or RS-485 (RS-232 2–3
connected, RS-485 1–2 connected)
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