Description

ABSOLUTE API4380-G

1. Basic Information

ABSOLUTE API4380-G is an industrial-grade DC isolated signal conditioner and transmitter. It is specially designed for DC signal processing in industrial automation, power system monitoring, scientific experiments and other fields, serving as a core component for DC signal isolation, conversion, regulation and precise transmission. Adopting advanced optical isolation technology and high-precision signal processing technology, it features superior isolation performance, high accuracy and flexible configuration. Its main function is to receive on-site DC voltage or current input signals, eliminate interference via optical isolation, linearly convert them into standard output signals and amplify signals simultaneously. It effectively avoids adverse impacts caused by ground loops and common-mode interference on the whole system, and is applicable to harsh industrial environments and high-precision measurement scenarios with balanced reliability and practicality.

Designed with compact and sturdy industrial structure, this product supports both DIN rail mounting and panel mounting. Classified as industrial signal conditioning components, it can be directly integrated into various industrial automation equipment, DCS/PLC control systems, power monitoring devices and laboratory instruments to meet the construction demands of diverse signal conditioning circuits. It possesses excellent environmental adaptability and anti-interference performance, operating stably within a wide temperature range from -40°C to 85°C with IP66 protection grade. It can resist electromagnetic interference, humidity, dust and other harsh on-site conditions. Fully compatible with various sensors, actuators, monitoring equipment and control systems, it supports flexible on-site configuration. Widely used in industrial automation, power systems, scientific laboratories, environmental monitoring and other industries, it provides solid guarantee for accurate measurement and stable transmission of signals.

With core strengths including high isolation voltage, high-precision measurement and flexible configuration, ABSOLUTE API4380-G is suitable for various DC signal processing applications, especially ideal for industrial control and scientific experiment scenarios with strict requirements on signal isolation and measurement accuracy. It is an indispensable core signal conditioning device in industrial automation and high-precision signal monitoring fields. Its series products also include high-voltage version ABSOLUTE API4380-HV to satisfy differentiated demands of different application occasions.

2. Technical Specifications

2.1 Core Electrical and Isolation Specifications

Isolation Parameters: Equipped with optical isolation technology, its isolation voltage reaches up to 2000 Vrms. It realizes effective electrical isolation between input and output terminals, eliminates ground loops, suppresses common-mode signals and noise interference, ensures safety of the system and field equipment, guarantees safe and reliable signal transmission, and meets isolation requirements of complex industrial electrical environments.
Power Supply Parameters: Rated operating voltage is 24V DC, built-in 18VDC unregulated loop excitation power supply for passive input devices. Rated power consumption is 5W with reasonable power loss, which effectively reduces overall equipment energy consumption, matches conventional on-site industrial power supply circuits and ensures long-term stable power supply.
Input & Output Parameters: Input range covers unipolar 0-50V DC / ±50V DC and bipolar ±50V DC; current input range: 0-20mA or ±20mA. Output range includes unipolar 0-5V DC / ±5V DC and bipolar ±5V DC; current output range: 0-5mA or ±5mA. Linear relationship is maintained between input and output signals to flexibly meet diverse signal demands.
Temperature Adaptability: Operating temperature range: -40°C ~ 85°C. It has outstanding high and low temperature resistance to withstand temperature fluctuations in industrial sites and extreme working environments, preventing module damage and signal distortion caused by abnormal temperature and ensuring stable measurement accuracy and operation.
Accuracy & Communication: It delivers high measurement precision fully complying with top industrial standards to guarantee accurate signal conversion and detection. It supports mainstream communication protocols such as I2C, SPI and UART with maximum data transmission rate up to 1Mbps, enabling flexible data interaction with various control systems and ensuring timely and accurate data delivery.

2.2 Physical and Structural Specifications

Mounting Method: Compatible with DIN rail installation and panel installation, conforming to unified industrial installation standards. Easy to install and quick to assemble inside industrial control cabinets or experimental equipment, it saves installation space and facilitates overall equipment layout and subsequent maintenance.
Physical Dimensions: Adopts compact industrial encapsulation with standard size 102×64×32 mm. The miniaturized structure fits most industrial control cabinets and laboratory instruments without occupying excessive space, achieving perfect balance between compact layout and practical performance.
Weight: Net weight is 250g with moderate mass. It is convenient for assembly and field deployment without increasing extra load of equipment, satisfying installation demands of industrial sites and laboratories with both sturdiness and portability.
Encapsulation & Connection: Featured with durable industrial housing and IP66 protection grade, it has excellent sealing performance, insulation property and impact resistance to effectively resist dust, moisture and other environmental erosion. Reasonably arranged pins and interfaces simplify wiring and daily maintenance. It is fitted with LoopTracker LED indicators to display input and output signal intensity for convenient on-site status observation and stable signal isolation & transmission.
Product Characteristics: Manufactured with high-quality industrial raw materials with firm structure, it has excellent vibration resistance, electromagnetic interference resistance, moisture-proof and dust-proof capabilities. It adapts to complicated physical working conditions in industrial and harsh environments, lowers failure risks induced by external disturbance and extends service life. It supports on-site parameter configuration; users can quickly set input and output parameters via external rotary switches and slide switches for easy operation and improved deployment efficiency.

2.3 Core Function and Compatibility Specifications

Core Functions: It integrates signal isolation, signal conversion, signal amplification and high-precision measurement functions. It realizes isolated transmission and accurate conversion of various on-site DC voltage and current signals, and converts input signals linearly into standard output signals for detection, control and recording by rear-end equipment. Meanwhile, it can adjust input current and voltage, filter signal noise and enhance signal stability to ensure measurement accuracy and satisfy requirements of high-precision application scenarios.
Integration Performance: Highly integrated design embeds core functional units including optical isolation circuit, signal processing circuit, power excitation module and LED indication module. No extra auxiliary components are required, so it can be directly matched with various industrial automation systems, monitoring devices and laboratory instruments. It simplifies system design and wiring work and cuts down construction and maintenance costs. The built-in unregulated loop excitation power supply can directly drive passive input devices for higher application flexibility.
Compatibility: Seamlessly compatible with various DC sensors, actuators, PLC, DCS control systems, monitoring meters and experimental equipment. It supports multiple combinations of input and output signals to adapt to unipolar and bipolar signal applications. Compatible with mainstream protocols including I2C, SPI and UART, it can work coordinately with other ABSOLUTE series modules and third-party industrial control devices, improving system integration flexibility and expandability for wide application in industrial automation and laboratory fields.
Reliability & Practicality: It has strong anti-interference performance and stable operating performance, capable of long-term stable operation in harsh industrial environments and laboratory conditions with high measurement accuracy and low failure rate to reduce equipment maintenance costs. The field-configurable design requires no dedicated software; parameters can be adjusted simply via external switches for rapid on-site installation and debugging. Real-time signal intensity displayed by LED indicators helps staff quickly locate faults and boost operation and maintenance efficiency.

3. Working Principle

Signal Acquisition and AccessThe module receives DC voltage and current signals (including multiple unipolar and bipolar ranges) transmitted from on-site sensors, monitoring devices and laboratory instruments through its input ports. Meanwhile, the built-in 18VDC unregulated loop excitation power supply provides working power for passive input devices to ensure stable signal collection. The LoopTracker LED indicators light up synchronously to display real-time input signal intensity for intuitive on-site observation.
Signal Isolation ProcessingThe built-in high-performance optical isolation circuit implements electrical isolation on collected signals with isolation voltage up to 2000 Vrms. It achieves complete isolation among input loops, output loops and power loops, eliminates ground loops, common-mode interference and noise pickup, prevents spread of fault voltage along signal lines and protects field equipment and rear-end control systems from damage. It also filters out clutter waves inside signals to improve signal purity and stability, laying a solid foundation for subsequent signal conversion.

Signal Conversion and RegulationIsolated signals are sent to the internal high-precision signal processing unit. According to on-site parameter settings via external rotary switches and slide switches, the module linearly converts input DC voltage or current signals into standard voltage or current output signals. It can amplify and regulate signals as required by the system to maintain linear input-output correspondence, meeting signal demands of rear-end monitoring, control and recording equipment and guaranteeing measurement precision and signal consistency. During operation, LED indicators synchronously show output signal intensity to reflect real-time signal conversion status.
Signal Output and Stable OperationConverted and regulated standard signals are transmitted to PLC, DCS control systems, monitoring meters and experimental recording equipment through output ports to complete effective signal delivery and practical application. Equipped with comprehensive built-in protection mechanisms, the module real-timely monitors operating voltage, current, temperature and signal transmission status. Supported by IP66 protection performance and wide temperature adaptability, it maintains long-term stable operation in harsh industrial environments and laboratory occasions, minimizes failure probability and ensures continuous and accurate signal transmission.

In the whole working process, the module realizes safe and precise transmission and regulation of DC signals relying on efficient optical isolation technology and high-precision signal processing capability. Its flexible on-site configuration, diversified mounting options and strong compatibility enable its wide deployment in industrial automation, power monitoring, scientific experiments and other fields, providing powerful technical support for high-precision signal measurement and stable automatic control.

4. Application Scenarios

4.1 Industrial Automation Field

It is widely applied in various industrial automatic production lines and DCS/PLC control systems. As a core signal conditioning component, it receives voltage and current signals output by on-site DC sensors such as pressure sensors, temperature sensors and flow sensors, converts them into standard signals after isolation processing and transmits them to upper control systems. It effectively avoids signal deviation caused by electromagnetic interference and ground loops, ensures high precision and stability of industrial automatic control, raises production efficiency and reduces equipment failure risks, fully meeting application demands in metallurgy, chemical industry, textile and other industrial sectors.

4.2 Power System Monitoring Field

It is used for equipment status monitoring in power industry to collect DC current and voltage operating signals of power facilities. Through high-precision isolation and signal conversion, it transmits monitoring data to power monitoring terminals to realize accurate status detection of power equipment, timely discover abnormal voltage and current values and ensure stable operation of power systems. It is applicable to substations, power transmission equipment, power distribution systems and other occasions to improve operation maintenance efficiency and overall safety of power grids.

4.3 Scientific Laboratory Field

Serving as a high-precision signal conditioning unit in various scientific research experiments, it is used for accurate measurement and stable transmission of DC current and voltage signals, providing reliable precise data support for experimental research. It matches experimental instruments in physics, electronics, chemical engineering and other laboratories, strictly satisfies high standards for signal precision and stability in experimental processes and improves accuracy and credibility of experimental results. Its flexible configuration mode also adapts to diversified signal requirements of different experimental projects.

4.4 Environmental Monitoring Field

Matched with environmental monitoring equipment, it processes DC signals output by environmental sensors including temperature & humidity sensors and air pressure sensors. Through signal isolation, conversion and amplification, it ensures stable delivery of monitoring data and realizes accurate detection of various environmental parameters to keep production and natural environments in line with relevant standards. It is suitable for industrial environmental monitoring stations and similar places to provide solid data basis for environmental governance. Benefiting from IP66 protection grade and wide temperature resistance, it is also applicable to outdoor and severe environment monitoring projects.