
8
EN
2.3 CPU control board
1LED RS422/485 protocol:
Red when sending signal.
Green when receiving signal.
2LED RS232 protocol:
Red when sending signal.
Green when receiving signal.
3LED 4-20mA* current loop protocol:
Red when sending signal.
Green when receiving signal.
4LED network light:
Green flashing rapidly = connection to network
in progress.
Green flashing slowly = connected to network.
Red flashing slowly = loss of network.
connection or failure to connect to network.
5LED green when CPU control board is powered up.
6LED red when communication to a secondary
petrol price sign is correct.
7RJ45 Ethernet socket for network connection of
the CPU board (main petrol price sign) to client PC.
8Connection of RS422/485 protocol.
9Connection of RS232 protocol.
10
Connection of 4-20mA current loop protocol.
11
Connection of CPU board 5V power supply**.
12
Connection of LED lines 15V power supply**.
13
Communication to LED lines.
14
Connection of a secondary petrol price sign to the CPU board.
15
Connection to extension card.
16
Antenna for HF communication with KarbuPad keypad.
Polarity of the connections is indicated on the CPU board.
A technical file is generated by the KarbuConfig software depending on your installation
and configuration, to suggest wiring for the CPU board.
*If Rx/Tx are reversed, the state of the LED is:
Green if is unchecked in the KarbuConfig software.
Orange (flashing red + green) if is checked in the KarbuConfig software.
** The TBT supply cables can be extended, however, for the installation to be compliant, please refer to the
NFC 15-100 norm to size the cables (length, cross section…).
1
5
9
2
6
10
11
12
15
14
16
13
3
7
4
8