300 slave station 485 converter

300 slave station 485 converterProduct Introduction:

1. Transparent hardware transmission, zero signal delay, suitable for multiple MBUS devices at home and abroad, with stable and reliable transmission performance.

2. Industrial grade materials, fully SMT processed.

3. Support parallel use of multiple devices, greatly improving load capacity.

4. The baud rate of 300-9600 does not need to be set and adapts automatically.

5. The module has short-circuit protection function. If the load short circuit (current exceeds 550mA), the MBUS power supply will be cut off instantly (less than 1 millisecond), and the overload indicator light will light up,

After troubleshooting the short circuit, a delay of 2 seconds will automatically restore power supply. Even if the load is constantly short circuited (the overload indicator light remains on), it will not be damaged.

6. The module comes with a 5V DC voltage output, reverse protection, and a power supply capacity of 1A, which can supply power to external 5V devices.

7. There is no crash phenomenon when using data switching chips.

8.485 A and B are fully protected, and can be connected to 24V or 36V without damage.

Product Introduction

DC 12-24V (tested to work stably with 9V-30V power supply), output current exceeds

150MA suggests connecting to 24V power supply

[Serial port mode] RS485 interface, baud rate 300BPS-9600BPS

Power Supply Indicator Light: Lights up when powered on 485 Data Indicator Light: Lights up when 485 data is received

MODBUS data indicator light: illuminated upon receiving MODBUS data

Overload indicator light: illuminates when MBUS power supply is cut off

Load capacity: 500MA load current, exceeding 300 slave stations. Threshold current for triggering short-circuit protection mechanism

550MA

[Dimensions] 115MM * 70 * 25 rail installation

-10-70 ℃

300 slave station 485 converterIt is a transparent transmission module that is only responsible for signal conversion between 485 and MBUS. There is no protocol or software, and it can work immediately after connecting the wires. There is no separate explanation

Ming Shu. A large number of projects have been verified to be stable and reliable.

1: MBUS is a European standard 2-wire 2-bus system primarily used for measuring heat and water meters.

2: The MBUS main station can provide 36V power supply to the downstream instruments.

3: This product module can provide a load current of 500mA and a voltage of 36V. Based on an estimation of 1.5mA per slave station, 500/1.5=the number of slave stations that can be carried

More than 300.

4:Strong anti-interference ability, with bandpass filters in circuit design, frequency converters, and motors that will not be affected by interference and unable to receive data.

5: Overload protection, overvoltage protection, baud rate adaptive.

common problem:

1: After connecting to the power supply, the power cannot start and the power light flashes.

Reason: The power supply is too low, or the output load is short circuited.

Explanation: XL6109 is used for boosting the 36V output, LM2576-5.0 is used for stabilizing the 5V output, and the current exceeds 2A at the moment of startup. Therefore

Power supply 24V 2A or above, 12V 5A.

2: When sending, the sending light flashes, but the receiving light does not flash

Reason: The sending light flashes and there is a jump in the 36V output during measurement, indicating that high and low voltage pulses have been sent out but no high and low current pulses have been received,

Perhaps the table address, baud rate, and checksum do not match, resulting in no response from the table.