PWM pulse width signal and 4-20mA analog signal isolation conversion and remote transmission field application program.

Release time:2021-09-29 03:41:37  Number of views:162

PWM isolation transmitter classification product 1. PWM pulse width modulation signal isolation is converted to standard 4-20mA/0-5V/0-10V analog signal isolation transmitter: ISO D-P-O-Q series
 
      SunYuan ISO D-P-O-Q series products are industry-leading technology, small size (SIP12 Pin), low-cost PWM pulse width modulation signal isolation transmitter IC newly developed by Shunyuan. The duty cycle of the PWM square wave signal output by the single-chip microcomputer, PLC/DCS, and instrumentation can be isolated and converted into a standard 4-20mA/0-10V analog signal to realize the isolation amplification and display control function of the single-chip PWM signal.   

       SunYuan ISO DPOQ integrates multiple high-isolation DC/DC power supplies, analog amplification and conversion circuits, PWM signal isolation control circuits, etc. in the same module. It is especially suitable for the DA reduction and isolation transmission of PWM signals in industrial fields, single-chip microcomputers, field buses, Ethernet Internet of Things, PLC/DCS host computer collects and analyzes signals from multiple sensors. The internal integrated high-efficiency DC-DC isolation power supply separately supplies power to the internal output conditioning circuit, DA conversion circuit and output signal isolation circuit. SMD process structure and new technology isolation measures enable the device to achieve 3000VDC three-isolation between auxiliary power supply and PWM signal input and analog signal output. And it can meet the requirements of industrial-grade harsh working environment with wide temperature, humidity and vibration.

     
SunYuan ISO D-P-O-Q series products are very convenient to use, and can realize the isolation transmission function of PWM signal and analog signal without any external components. The 12-pin single-in-line ultra-small size (33.0X15.5X10.5mm) and standard PCB board mounting design effectively simplify the user's system design options and reduce the volume and wiring costs. Products include IC package mounted on PCB board, DIN35 standard rail mounting and PIM panel display embedded mounting mode. The DIN rail type installation method can realize the signal one-in-one-out, one-in and two-out isolated transmission function. The PIM panel embedded intelligent transmission meter can realize various functions such as sensor analog signal isolation display, alarm control and long-distance distortion-free transmission. It is widely used in metallurgy and mining, petrochemical industry, power equipment, medical equipment, industrial automation, new energy facilities and military scientific research and other fields. Users can choose suitable products according to site needs.

 
Remark:
1. If the user has requirements for the output load capacity of the product voltage signal or current signal, it can be customized according to technical requirements.
2. The user chooses the IC packaged product mounted on the PCB board. The field signal input amplitude is 24V (high level). Please divide the input amplitude into 5V amplitude before connecting to the product to avoid affecting the use of the product or causing damage.
3. The user chooses DIN35 or DIN3 rail-mounted products, and the field signal input amplitude (high level) is 24V. When placing an order, please specify that the signal amplitude is 24V. We will install the voltage divider circuit inside the product and leave the factory.
 
 
Product features of PWM pulse width modulation signal to analog signal isolation transmitter
● PWM to 4-20mA/0-10V analog signal resolution is sensitive and fast response speed
● Very high linearity in the full range (non-linearity <0.2%)
● Auxiliary power supply and signal input and output 3000VDC three isolation
● Auxiliary power supply: 5V, 12V, 15V or 24V DC single power supply
● Low cost and ultra small size, SIP-12 meets UL94V-0 standard flame retardant package
● Strong anti-EMC electromagnetic interference and high-frequency signal spatial interference characteristics
● Industrial temperature range:-40 ~ + 85 ℃
 
Typical application   
● PWM signal transmission, isolation, long-term transmission
● PWM signal is converted into analog quantity for linear precision control
● Convert PWM signal of MCU into analog signal
● Industrial field PLC control and inverter control
● Ground wire circulation interference suppression
● Automatic selection and control of industrial boiler temperature
● PWM construction of DA converters and transmitters
 
Product selection example
Example 1:  Signal input: 20KHz square wave; Signal output: 4-20mA; 100mSec response time;  Auxiliary power supply: 24V. Corresponding product model: ISO D5-P1-O1-Q1
Example 2:  Signal input: 50Hz square wave;  Signal output: 0-5V;  3Sec response time;    Auxiliary power supply: 12V. Corresponding product model: ISO D1-P2-O4-Q3
Detailed technical information:https://www.sunyuansz.com/products/lm1/28.html
Typical application
 
 Application 1: The 4-20mA/0-10V analog signal output by the sensor and transmitter is isolated and converted into a PWM signal by the ISO U-P-D-Q module. Remote distortion-free transmission is carried out through the ISO CAN module, and then restored to a 4-20mA/0-5V analog signal by the ISO D-P-O-Q module for linear precision control.
   
Typical application of DIN35 rail mounting products
DIN35 rail installation product application: the 4-20mA/0-10V analog signal output by the sensor and transmitter is isolated and converted into a PWM signal by the DIN1X1 ISO U-P-D-Q module. The remote distortion-free transmission is carried out through the ISO CAN module, and then restored to a 4-20mA/0-5V analog signal by the DIN1X1 ISO D-P-O-Q module for linear precision control.
 
PWM isolation transmitter classification product 2. 4-20mA/0-10V analog signal isolation and conversion to PWM pulse width modulation signal isolation transmitter: ISO U/A-P-D-Q series
 
      SunYuan ISO U(A)-P-D-Q series products are the industry-leading technology, small size (SIP12 Pin) low-cost programmable control isolation transmitter newly developed by Shunyuan. The analog signals output by sensors, instruments, and transmitters can be isolated and amplified, AD converted into PWM square wave signals, and pulse frequency control and programmable output can be realized. Sensors, transmitters, instruments and control equipment can be embedded with PC and PLC/DCS to form an Ethernet/Internet of Things, RS232 bus network and communicate with the network immediately after the IC is embedded to upgrade the traditional control equipment on site to industrial control intelligent equipment , It is convenient for users to remotely monitor.
   
    SunYuan ISO U(A)-P-D-Q integrates multiple high-isolation DC/DC power supplies, analog amplification and conversion circuits, programmable MCUs, signal isolation control circuits, etc. in the same module. It is especially suitable for AD isolation and transformation of analog signals in industrial sites. Send, fieldbus, Ethernet Internet of Things, PLC/DCS host computer collects and analyzes the signals of multiple sensors. The internally integrated high-efficiency DC-DC isolation power supply separately supplies power to the internal input conditioning circuit, micro single-chip AD conversion circuit and output signal isolation circuit. SMD process structure and new technology isolation measures enable the device to achieve: 2500VAC three isolations between auxiliary power supply and analog signal input and PWM signal output, and the input signal and the communication serial port share the same ground. And it can meet the requirements of industrial-grade harsh working environment with wide temperature, humidity and vibration.    

      
SunYuan ISO U(A)-P-D-Q series products are very convenient to use, and can realize the isolated transmission function of analog signal and PWM signal without any external components. The 12-pin single-in-line ultra-small size (33.0X15.5X10.5mm) and standard PCB board mounting design effectively simplify the user's system design options and reduce the volume and wiring costs. Products include IC package mounted on PCB board, DIN35 standard rail mounting and PIM panel display embedded mounting mode. The DIN rail type installation method can realize the signal input and output isolation transmission function. The PIM panel embedded intelligent transmission meter can realize various functions such as sensor analog signal isolation display, alarm control and long-distance distortion-free transmission. It is widely used in metallurgy and mining, petrochemical industry, power equipment, medical equipment, industrial automation, new energy facilities and military scientific research and other fields. Users can choose suitable products according to site needs.

 
Analog signal to PWM pulse width modulation signal isolation transmitter product features
● 4-20mA/0-10V to PWM signal resolution is sensitive and fast response speed
● Very high linearity in the full range (non-linearity <0.5%)
● Auxiliary power supply and signal input, output 2500VAC three isolation
● Auxiliary power supply: 5V, 12V, 15V or 24V DC single power supply
● Low-cost and ultra-small size, SIP-12 meets UL94V-0 standard flame-retardant package
● Strong anti-EMC electromagnetic interference and high-frequency signal spatial interference characteristics
● Industrial temperature range:-40 ~ + 85 ℃
 
Typical application 
● Analog signal transmission, isolation, long-term transmission
● Industrial field PLC control and inverter control
● Industrial field motor control and light adjustment control
● Ground wire interference suppression
● Automatic selection and control of industrial boiler temperature
● PWM construction of AD converter
Detailed technical information:https://www.sunyuansz.com/products/lm1/29.html
 
 
Product selection example
Example 1: Signal input: 0-5V; Signal output: 5KHz square wave; 100mSec response time; Auxiliary power supply: 24VDC; Corresponding product model: ISO U1-P1-D3-Q01
Example 2: Signal input: 0-20mA; signal output: 25KHz square wave; 500mSec response time; auxiliary power supply: 12VDC; corresponding product model: ISO A3-P2-D5-Q05
Typical application wiring diagram
 
Remarks: The level of the communication port of the IC module is 3.3V TTL level. If the customer does not have a USB to TTL (3.3V) level converter, only USB to 232 line or 232 to 232 line, then the customer uses us In the case of the IC module, the level conversion chip MAX232 or SP3220E must be added to convert the TTL level of the IC module to 232 level (15V) and then connect it to the conversion head. The schematic diagram is as follows:
Application 1: Current amplifier to enhance PWM drive load capacity.
The amplitude of the PWM signal output by the IC module itself is 5V, and the current drive capability is 100mA.
If the customer wants to change the amplitude or expand the current drive capacity, they can use an external power amplifier circuit for amplification. The reference circuit is as follows (for reference only):
  
Application 2: Isolate and convert the analog signals output by sensors and transmitters into PWM signals, and use the CAN bus module for remote distortion-free transmission.
  
Application 3: Isolate and convert the analog signals output by sensors and transmitters into PWM signals, which are used to regulate the speed of DC motors.  
Application 4: The analog signal output by the sensor and transmitter is isolated and converted into a PWM signal through ISO U-P-D-Q, remotely transmitted through the ISO CAN module, and then restored to an analog signal through ISO D-P-O-Q.
Host computer communication function
The ISO U(A)-PDQ series IC has the function of communicating with the host computer. The communication connection line: USB to TTL (3.3V) level line (the conversion line can be purchased in the market). When the customer uses the IC pin TX, RX , GND2 are respectively connected to the RX, TX, GND of the USB cable, and the binary value and duty cycle value after ADC conversion can be read using the serial debugging assistant to facilitate the customer to analyze the data. The serial port debugging assistant is set to: baud rate 19200bps, no parity bit, 8 data bits, 1 stop bit, as shown in the figure:
 

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