Chapter 2 – Hardware Information 22Mini SSP Vending Control Board AIOT-MSSP012.3.2.11 Protocol A (CN12)Pin Signal Description Pin Signal Description1 MDBSLAVE_EXE_TX+_5V 2 MDBSLAVE_EXE_TX-_5V3 MDBSLAVE_EXE_RX+_5V 4 MDBSLAVE_EXE_RX-_5V5 PWR_IN_AC 6 GND2.3.2.12 DEX INTERFACE (CN13)Pin Signal Description Pin Signal Description1 DEX_DET 2 GND3 DEX_DOUT 4 DEX_RINAll manuals and user guides at all-guides.com