Release time：2021-09-26 08:20:24 Number of views：329次
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.
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.
New signal isolator 9: Passive two-wire alternating current (AC) current and voltage signal to 4-20mA analog signal isolator
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