Sunyuan SYS U-P-O series analog voltage signal and SYS A-P-O series analog current signal amplifier and transmitter IC, using a small volume (single row of four pins, SIP4 Pin) low-cost design scheme, is mainly used to solve the sensor and instrumentation, PLC, DCS interface to match the interface between: 0-2.5V/0-5V/1-5V/0-10V/0-20mA/4-20mA and other standard analog signals and non-standard conversion problems. 20mA/4-20mA and other standard analog and non-standard analog signal conversion problems. The product has ultra-high precision (0.05% error in full scale) and high linearity (0.1% error in full scale), the design adopts the common ground between the working power supply and the signal channel, without the need for external adjusting potentiometer and other components, free of zero and gain adjustment of the simplified program, applicable to the field instrumentation in the zero bias of the analog signal conversion and amplification (eg: 1-5V and 0-5V, 4-20mA) With 0-10V and other input signal zero bias, and the output signal zero need to set the value of "0" applications), can realize the industrial field instrumentation interface between the analog signal matching, conversion and remote amplification functions.

        SYS U-P-O series and SYS A-P-O series products adopt advanced feedback zeroing technology, which can ensure the high accuracy of zero point and fullness value within the range of signal input and output. Due to the size limitation, the internal power supply of the product is not boosted and isolated, so the power supply voltage must be higher than the signal output voltage by more than 2VDC. (For example, if the output signal is 0-5V, the power supply voltage should be more than 7VDC, and 9VDC or 12VDC is optional). Users who need full isolation of signal and power supply should use our ISO EM U-P-O or ISO EM A-P-O series products.

         SYS U-P-O series and SYS A-P-O series products are mainly used for direct high-precision conversion and amplification of analog voltage and current signals without isolation. Compared with ISO series photoelectric isolation amplifiers and ISO EM series magnetic isolation transmitters, they have smaller volume, lower cost and better accuracy and linearity. Widely used in metallurgy and mining, petrochemical industry, electric power equipment, medical instruments, industrial automation, new energy facilities and military scientific research and other fields, the user can choose the appropriate products according to the needs of the site.

block diagram

Product Selection Example 

Example 1: Input: 0.4-2V; Output: 0-2.5V; Auxiliary power supply: 5V. Model No.: SYS U3-P3-O2 

Example 2: Input: 0-5V; Output: 0-10V; Auxiliary power supply: 24V. Model No.: SYS U1-P1-O5 

Example 3: Input: 4-20mA; Output: 0-5V; Auxiliary power supply: 9V. Model No.: SYS A4-P5-O4 

Example 4: Input: 4-20mA; Output: 0-10V; Auxiliary power supply: 15V. Model No.: SYS A4-P4-O5

Typical application

Typical application wiring diagram for small DIN3 rail mounted products

Miniature Low-Cost, High-Precision Analog Signal Amplifier Transmitters: SYS U-P-O/SYS A-P-O Series

Two-wire Passive Analog Signal Isolator|Isolation Amplifier|Isolation Transmitter New Product Introduction

Introduction: Passive, in terms of electronics, it means that the circuit can work when there is a signal without a power supply. Usually, devices that can work without a power supply are called passive devices. The commonly used passive components in circuits are mainly diodes and resistors. , Inductance and capacitance components. The devices in the circuit that require an external auxiliary power supply to work normally are called active devices. Active devices are generally used to isolate and amplify signals, convert and transmit, and so on. Commonly used active devices are transistors, power amplifiers, signal transmitters, isolation amplifiers, field effect transistors, thyristors and other devices. According to the current industrial Internet's matching needs of various sensors, transmitters and PLC, DCS systems in the industrial field, Shunyuan Technology has launched a series of new products of low-cost, small-volume passive (no external auxiliary power supply) analog signal isolators , Provided to sensor and instrument manufacturers and industrial Internet system integration design engineers to choose. The following recommend several new two-wire 4-20mA output passive analog signal isolation transmitter optional technical solutions, for manufacturers and industrial Internet system integration engineers on-site application reference.

Signal isolator new product 1: Passive DC unidirectional voltage current, electronic ruler displacement resistance signal to two-wire current signal isolator

Passive displacement resistance signal (ISO R-O), analog voltage signal (ISO U-O), analog current signal (ISO A-O) transmitter is the industry's smallest volume and low cost passive loop-fed analog signal isolation transmitter IC . The IC has a unique high-efficiency signal coupling transformer loop feeding technology, which provides power supply operation through the subsequent current output loop feeding mode, without the need for an external working power supply. The IC is matched with sensors, instrumentation, PLC/DCS in the design plan, can adapt to various specifications of analog voltage, current or displacement resistance signal input, and amplify the active signal of industrial field two-wire/three-wire/four-wire general sensor After conditioning and isolation and transmission, it outputs 4-20mA/2-10mA/4-12mA/4-8mA/12-20mA and other two-wire analog current signals with various parameters. The core components in the technical solution: Passive displacement resistance signal (ISO R-O), analog voltage signal (ISO U-O), current signal (ISO A-O) The transmitter is designed as a high-precision, small-volume standard SIP12 Pin flame-retardant IC package , It adopts a unique magnetic isolation coupling method and high-efficiency post-feeding technology, which can realize DC voltage, current, one-way signal and angular displacement, electronic ruler, potentiometer and other analog signals to the two-wire loop feed current The precise isolation conversion of the ring signal matches the standard analog input ports of various types of instruments (such as PLC, DCS, FCS). The core products of the solution include small-volume IC package PCB board mounting and DIN35 standard rail mounting. The DIN rail mounting method can realize signal one in and one out, one in and two out, one in and three out, and two in and two for industrial sites. Output, four-way, eight-way, and sixteen-way signal isolation conversion function, users can choose technical solutions according to site needs.

Detailed technical information: https://www.sunyuansz.com/uploads/soft/210811/2-210Q1103Q2.pdf

New product of signal isolator 2: Passive low-cost, small-sized two-wire 4-20mA (0-20mA) current loop analog signal isolator:
Two-wire passive ISO 4-20mA (SIP12 Pin package) and ISOS 4-20mA (SIP7 Pin package) 4-20mA current loop signal isolator. It is a front-end 4-20mA (0-20mA) current signal input , Passive signal isolation module with 4-20mA (0-20mA) current signal output. The solution uses a unique electromagnetic isolation mode and high-efficiency input loop power stealing technology, which effectively solves the dependence of the transmission current signal isolation between the instrumentation and the sensor on the power supply, and realizes the 4-20mA (0-20mA) standard signal High precision and high linearity isolation. In the scheme design, the passive signal isolator obtains energy from the current loop of the sensor, and outputs an active 4-20mA analog signal after isolation to drive or control instrumentation, PLC, and DCS devices. The core products of the solution include small-volume IC package PCB board mounting and DIN35 standard rail mounting. DIN rail mounting can realize multiple signals such as one in and one out, two in and two out, and three in and three out for industrial sites. With the isolation conversion function, the user can choose the scheme according to the needs of the scene.

Detailed technical information: http://0032.psznh.cn/static/upload/file/20230906/1693993393454775.pdf

New product of signal isolator 3: Passive low-cost, small-sized two-wire 4-20mA loop-fed analog signal isolator
ISO 4-20mA-F (SIP12 Pin) and ISOS 4-20mA-F (SIP7 Pin package) 4-20mA current loop signal isolation distributors are two-wire loop-powered isolation modules. Through the post-feeding mode, it supplies power to the front-level two-wire equipment, and receives the 4-20mA current signal output from the two-wire equipment, and outputs a 4-20mA current signal to the sensor after being isolated by the module. This solution adopts a unique electromagnetic isolation mode and high-efficiency post-feeding technology, which effectively solves the dependence of current signal isolation on the power supply, and realizes the accurate isolation and transmission of standard signals of 4-20mA, which can be connected to two-wire with various instruments. Control loop power supply analog input ports (such as PLC, DCS system, etc.) to match.

Detailed technical information: https://www.sunyuansz.com/uploads/soft/210811/2-210Q1102521.pdf
 
New signal isolator 4: Passive low-cost, small-size analog voltage to two-wire 4-20mA current signal V/I conversion signal isolator
ISO V-4-20mA (SIP12 Pin) and ISOS V-4-20mA (SIP 7Pin) passive V/I conversion analog signal isolation transmitter, is a voltage input, two-wire current output loop power supply signal Isolate the transmission module. Provides a set of 5V (3mA) functional expansion power supply to the input terminal through the power feeding mode of the back-end current loop to supply power to the front-end equipment, and receives the voltage signal output from the front-end equipment. Wire current signal. This solution uses a unique electromagnetic isolation mode and high-efficiency post-feed technology to achieve precise isolation conversion from voltage signals to 4-20mA standard signals, and can be connected to the analog input ports of various instruments (such as PLC, DCS systems, etc.) Match. This technical solution is very convenient to use, and can realize voltage signal input, displacement potentiometer, and other voltage signal isolation transmission that require power distribution type sensors or bridge (weighing) detection circuits without any additional components.。

Detailed technical information:  https://www.sunyuansz.com/uploads/soft/210811/2-210Q1103110.pdf

New signal isolator 5: Passive low-cost two-wire 4-20mA current to analog voltage signal I/V conversion signal isolator
ISO 4-20mA-O series (SIP12 Pin package) two-wire passive 4-20mA to voltage signal isolation converter, which can isolate the input active 4-20mA current signal and convert it into a voltage signal I/V conversion output. This solution uses a two-wire input loop power supply mode, unique high-efficiency signal loop power stealing technology, no external working power supply, greatly simplifies the user's design, and reduces user wiring costs. The module contains current signal modulation and demodulation circuit, signal coupling isolation conversion circuit, power inverter circuit, subtraction circuit, buffer processing output circuit, etc. The small input equivalent resistance enables the product to be from the sensor signal output loop Collect the current signal, and can reach the voltage drop ≤ 10V when the 20mA signal is input. In order to meet the needs of users to realize long-distance and distortion-free transmission and conversion of signals without an external auxiliary power supply.

Detailed technical information: https://www.sunyuansz.com/uploads/soft/210811/2-210Q1102952.pdf

New Signal Isolator 6: Passive low-cost, small-volume two-wire 4-20mA current loop signal isolator
ISO 4-20mA-E (SIP12 Pin package) and ISOS 4-20mA-E (SIP7 Pin) two-wire passive 4-20mA analog isolation conditioning controller, which can convert the input active 4-20mA current signal into Isolated passive control signal output, used to control the two-wire loop power supply (explosion-proof mode) 4-20mA current loop, to achieve the on-site matching of sensor signal acquisition and analog input interface active load, which effectively solves the problem of collecting active 4- The 20mA current signal conflicts with the power supply of the receiving port of the two-wire current loop power supply loop. This solution adopts high-efficiency loop power stealing technology, no independent power supply is needed, and it is very convenient to use. Users can adjust the potentiometer for ADJ correction.

Detailed technical information: https://www.sunyuansz.com/uploads/soft/210811/2-210Q1102924.pdf

New Signal Isolator 7: Passive low cost, small size two-wire PWM signal to analog signal isolator
ISO D-O1 series (SIP8 Pin package) is a passive type PWM pulse width modulation signal isolation and conversion to a two-wire 4-20mA transmitter IC. The working mode of this IC is to receive the PWM signal from the front-end device through the current loop feeding mode of the back stage (output end), and output the corresponding 4-20mA standard two-wire current signal after isolation conversion. The PWM pulse width transmitter solution is designed as a SIP8 Pin (single row 8-pin in-line package) small-size PCB board welding installation method. The IC contains a signal coupling high-speed isolation conversion circuit, a precision reference voltage source switch control circuit, and a low-pass filter. The circuit, drive amplifier circuit, VI conversion circuit, etc., have the characteristics of high PWM signal conversion accuracy, good linearity, and wide output loop power supply voltage range (12-36VDC). The highly integrated process structure and new technology isolation measures enable the core components in the program to achieve: signal input and output 3000VDC isolation, and can meet the requirements of industrial-grade harsh working environment with wide temperature, humidity and vibration.

Detailed technical information: https://www.sunyuansz.com/uploads/soft/210811/2-210Q1113501.pdf

New signal isolator 8: Passive two-wire Pt100/Cu50 thermal resistance temperature measurement signal loop feed signal isolator
ISO ZW-O1 small size (12-pin single in-line IC package SIP12 Pin) low-cost passive two-wire 4-20mA loop-fed thermal resistance signal isolation transmitter, mainly used for three-wire, four-wire or two-wire system Pt10 / Pt100 / Pt1000 or Cu50/Cu100 temperature sensor signal collection, isolation and transmission. The solution is used in the temperature detection of industrial sites, and the temperature signal collected by the thermal resistance sensor can be converted into a linearly proportional standard 4-20mA current signal output according to the amount of change.

ISO ZW-O1 adopts the electromagnetic isolation mode and the patented technology of high-efficiency post-feeding invention. It can realize the precise isolation conversion from the temperature signal output by the thermal resistance sensor to the 4-20mA standard signal without an independent power supply. It can be directly used with all kinds of common The analog input ports of instruments (such as PLC, DCS system, etc.) match. The IC contains signal modulation and demodulation circuit, signal coupling isolation conversion circuit, high-efficiency DC-DC boost circuit, signal zero point, full-scale calibration circuit and Pt100 thermal resistance linearization, long-line compensation, interference suppression circuit, etc. The output circuit has a wide power supply voltage range (12-36VDC), high conversion accuracy, and good linearity. The full scale and zero point can be adjusted and calibrated on-site by the user through an external potentiometer.

Detailed technical information: https://www.sunyuansz.com/uploads/soft/210811/2-210Q1104612.pdf

New signal isolator 9: Passive two-wire alternating current (AC) current and voltage signal to 4-20mA analog signal isolator

DIN ISO AC-O1 series AC to DC (AC/DC) passive two-wire signal isolation transmitter is an isolation transformer that can output the DC standard 4-20mA current signal in linear proportion to the measured AC current and voltage Sender. Equipped with corresponding indicating instruments or directly delivered to the DCS/FCS system to realize the system's measurement and control of AC voltage or current. The output of this module is designed for the two-wire power supply circuit connected in series with 24VDC and sampling resistance (two-wire instrument), which is the same as the analog input interface board (host computer), PLC, DCS or other instruments commonly used in the industrial field. The input ports match. The high-efficiency loop power stealing technology is selected in the scheme design without the need for independent power supply. The two-wire loop power supply output mode adopted can save two power lines, which greatly simplifies the user's system scheme design and reduces the user's wiring cost.
In the scheme design, the working power circuit of the indicating instrument, PLC or DCS in the system is fully used to completely isolate the input circuit device of the signal from the output detection control loop, which improves the reliability and stability of the system operation, and fully guarantees and improves The safety factor of equipment and staff, so this program is widely used in the fields of electric power remote monitoring, electric power instrumentation, medical equipment, industrial automatic control and so on.

Detailed technical information: https://www.sunyuansz.com/uploads/soft/210811/2-210Q1133U6.pdf