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4 KARL4 CIRCUIT BOARD
Front
The vending machine module is equipped with 2 keys and 2 LEDs (red and green). This allows a
service technician to see the operating status of the terminal and make adjustments if
necessary.
The arrangement of the keys, LEDs, and card slots is shown below:
Figure 4 – Front view of KarL4
The system has 2 slots for chip cards: one slot for the dealer card and one slot for an optional
SIM card for mobile communications. A SIM card is not required as the KarL4 is equipped ex
works with a SIM chip which is already activated.
Back
MODEM
MDB-MASTER
BLE
RFID LEDS
RFID ANT
Figure 4 – Back view of KarL4
Status LED Modem (green)
Plug-in slot SIM-card (currently not necessary)
Plu-in slot dealer card
Status LED Testmode (yellow)
S2 and red LED
S1 and green LED
Backup battery
Status LED (red)
READER
MDB-SLAVE
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