1: MBUS is a European standard 2-wire two bus, mainly used to measure heat meters and water meters.

2:485 mode cannot supply power to the connected device. The device needs to solve the power supply problem separately. The MBUS master station can provide 36V power supply to the next instrument.

3: This product module can provide load current 500 mA, voltage 36V, estimated by 1.5 mA per slave, and the number of slaves can exceed 300.

4: Super anti-interference ability, there will be no interference and data cannot be received.

5: The protection function is comprehensive.

Features:

1. Use dedicated data to switch chips, there is no crash.

2, 485 A, B full protection, casually connected 24V, 36V will not be bad.

3, 5V output has reverse protection.

Product introduction:

1. Transparent transmission of hardware, zero delay of signal, adapt to many MBUS equipment at home and abroad, and the transmission performance is stable and reliable.

2. Industrial grade materials, full SMT processing.

3. Support multiple devices in parallel to greatly improve the load capacity.

4. The full range of baud rate support, no need to set, automatically adapt.

5. The module has short-circuit protection function, the load is short-circuited (current exceeds 550mA), and the MBUS power supply is cut off instantaneously (less than 1 millisecond), and the overload indicator lights up.

After the short circuit fault is removed, the delay will be automatically restored after 2 seconds delay. Even if the load is always short-circuited (the overload indicator is always lit), it will not be damaged.

6. The module comes with 5V DC voltage output, power supply capacity 1A, can supply power to external 5V equipment.

Technical Parameters:

1, power supply: DC 12-24V (measured 9V-30V power supply can work stably)

2, serial port mode: RS485 interface, baud rate 300BPS-9600BPS

3. Indicator light: power supply indicator lights up when powered on

485 data indicator Received 485 data lit

MODBUS data indicator Received MODBUS data is lit

Overload indicator Lights up when MBUS is powered off

4, load capacity: 500mA load current, over 300 slave stations. The threshold current that triggers the short-circuit protection mechanism is 550mA.

5, Dimensions: 115mm * 70 * 25 rail installation

6, working temperature: -10--70 ° C

Measured, the power supply is 24V, the output current is 507mA, and the output voltage is 34.5V (because the 500mA PTC and the sampling resistor inside consume 1.5V)

The communication is completely normal.