SM100 Series T HART Smart Converter
Instructions for use
1, 0 SM100 Series T HART Smart Converter Introduction
1.1 Product Introduction
SM100 series HART intelligent converter is the use of ARM microprocessor, HART protocol modulation demodulation dedicated chip and combined with a large number of practice
products developed by experience. It is designed according to the requirements of industrial products, with high reliability and stability. The smart converter is equipped
The standard RS232 interface and RS485 interface can be used for transparent data transmission or conversion with intelligent instruments with HART protocol.
MODBUS_RTU protocol to read data to ensure real-time data transmission.
The HART protocol uses the Bell202 frequency shift keying (FSK) standard to superimpose modulated digital signals on the basis of 4 ~ 20mA, making the HART
The protocol instrument allows two-way data communication without interfering with 4 ~ 20mA analog signals. SM100 series intelligent converter is a digital letter
An intelligent converter for bidirectional modulation and demodulation of analog signals.
2 1.2 Product Features
● Equipped with standard RS232 and RS485 communication interface, you can configure parameters, change the communication baud rate and parity bit.
It has nothing to do with the 1200 communication speed on the HART bus, thus improving the operating speed of the entire system.
● The use of industrial universal module shell, easy to install and debug.
● Equipped with special configuration software, SM100 series intelligent converter can be configured with parameters, and through the intelligent converter,
Data communication with HART protocol smart meters is possible.
● Supports standard MODBUS_RTU protocols.
● Support simultaneous connection of multiple HART protocol smart meters.
● Support a variety of special HART protocol smart meters, and can customize the instructions for reading special HART meters.
3 Main parameters of 1.3
● Input voltage of power supply: DC 12~24V, ripple of power supply shall not be greater than 200mA, and current shall be 100mA.
● Shell size: length 134 mm × width 71 mm × height 43mm.
● Working environment temperature:-20 ℃ ~ +80 ℃.
● Relative humidity: 10% ~ 80%.
For more information, it is recommended to consult the relevant experts or consult the product manual
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GND.POW: power interface terminal, POW is connected to the positive pole of the power supply, GND is connected to the negative pole of the power supply. GND, R232RX, R232TX: RS232 communication interface terminal BR485D-, BR485D +: RS485 communication interface B terminal AR485D-, AR485D +: RS485 communication interface A terminal. LOOP1 +, LOOP1-~ L0OP4 +, LOOP4-: a total of four groups of HART instrument communication interface terminals
2.4 Indicator Description
POW power indicator: always on after power is applied
RS485 communication indicator light: flashes when RS485 serial port performs data exchange RS232 communication indicator light: flashes when RS232 serial port performs data exchange HART communication indicator light: flashes when HART converter performs data exchange with HART instrument
3.2 two-wire and four-wire HART protocol instrument difference
Four-wire HART protocol meter: The four-wire HART meter is separately powered, and its power line is separate from the 420mA input and output lines.
Two-wire HART protocol instrument: The power cord and 4 ~ 20mA input and output lines of the two-wire HART instrument share two lines.
3.3 HART intelligent converter connected to multiple HART protocol instrument debugging steps
-1 'is connected to a HART protocol intelligent instrument. The HART address defaults to 0 and does not need to be modified.
-4 'is connected to 4 HART protocol intelligent instruments. HART addresses should be changed to 1, 2, 3 and 4. At this time, the current output by all HART sensors is 4mA, and only one 2502 resistor needs to be connected to the resistor.
6-8 'is connected to 8 HART protocol intelligent instruments. The HART address should be changed to 1, 2, 3, 4, 5, 6, 7 and 8. At this time, the current output by all HART sensors is 4mA, and only one 2502 resistor needs to be connected to the electric anode. After using the USB/RS232 converter, when connecting the RS232/RS485 converter, the RS232/RS485 converter needs to be connected to the DC5V power supply.
Using Siemens PLC programming line, USB-PPI (USB-RS485 line) 3 pins are D + and 8 pins are D-.
4, configuration software function introduction and operation steps
4.1 system parameter interface function introduction
4.2 transparent working mode interface function introduction
4.3 general T HART protocol interface function introduction
4.4 Special T HART Protocol Interface Function Introduction
4.5 custom T HART protocol interface function introduction
4.6 Reading Data with 2 ModScan32 Test Software
5, data register address.
SM100 Series T HART Smart Converter Use Precautions
1. Please read the instructions carefully before use.
2. Confirm whether the power supply meets the working requirements of the equipment.
3. Is the distance from HART instrument equipment greater than 200m? If it exceeds this range, please use a thicker line and add a screen.
cable. When using a shielded wire, ground one end.
Whether there is a large inductive load nearby, which is serious to the signal interference, appropriate shielding measures should be taken.