11/30/2022 0 Comments Gb125 ems bus![]() TX works in the current domain so this board converts the TX signalling of the UART into a specific current signal for the EMS bus.ĭid not understand anything what you just read? This cable has 2 extended plugs that fit into the recessed connector hole on the boiler.īecause the EMS bus is about 16VDC, works with an offset and the signal in the top few volts, the RX signal needs to be stepped down to 0-3.3V or 5V. High quality 50cm 3-pin jack cable for connecting the board to the EMS service jack on the boiler/heat pump (if available).4 plastic PCB mounting feet (5mm height) with double sided tape.Additional bus protection with polyfuse and TVS diodes.Connect to the EMS bus via the screw terminal or the 3.5mm EMS service jack.Supports all EMS bus types like EMS, EMS+, EMS2, Heatronic 3 etc.3.3V and 5V UART/serial port compatible.New much smaller form factor (only 35x42mm).With this board you can safely connect a UART/serial port of your microcontroller or development board to the EMS bus. This is the latest version of the original BBQKees EMS bus to microcontroller UART interface board. ![]()
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