$ 98.90
Weidmuller ACT20P-CI-CO-S isolating amplifier for 0(4)–20 mA signals with 3-way isolation, high accuracy, and HART-compatible signal transmission.
The Weidmuller ACT20P-CI-CO-S analogue isolating amplifier is a precision signal conditioning device designed to reliably isolate and convert standard 0(4)–20 mA current signals in industrial control systems. It addresses common challenges such as ground potential differences, electrical noise, and signal instability between field sensors and control equipment. Featuring true three-way galvanic isolation between input, output, and power supply, this module ensures clean signal transmission while maintaining system safety. Its slim DIN-rail design allows easy integration into space-constrained control panels without compromising performance or reliability.
In practical applications, the ACT20P-CI-CO-S provides stable current signal conversion for 2-wire, 3-wire, and 4-wire transmitters used in process monitoring and automation. High measurement accuracy supports consistent control performance, while rapid signal response ensures timely feedback in dynamic processes. The transparent handling of HART communication enables technicians to perform diagnostics and parameter checks without interrupting operation, reducing maintenance time. With robust isolation, wide operating temperature range, and compact construction, this isolator is well suited for continuous-duty use in industrial environments where reliability and signal integrity are critical.
Why choose Weidmuller ACT20P-CI-CO-S?
The Weidmuller ACT20P-CI-CO-S stands out for engineers who demand absolute signal reliability without added complexity. Its ultra-slim housing saves valuable cabinet space, while true three-way galvanic isolation protects both field devices and control systems. The ability to pass HART communication unchanged allows diagnostics and configuration without rewiring or downtime. Combined with high accuracy and fast response, it delivers a dependable, future-ready solution for professional automation panels.
What problem does it solve?
The ACT20P-CI-CO-S eliminates signal errors caused by ground loops, electrical interference, and mismatched sensor connections. In mixed or noisy industrial environments, these issues can lead to unstable readings, false alarms, or control drift. By electrically isolating the input, output, and power supply while maintaining precise current conversion, the module ensures clean, trustworthy signals that keep processes stable, safe, and easy to maintain over long operating periods.
| Feature | Details | Benefit |
|---|---|---|
| Product Type | Analogue isolating amplifier / signal converter | Ensures safe and stable transmission of analogue current signals |
| Input Signal Range | 0–20 mA / 4–20 mA | Compatible with standard industrial sensors and transmitters |
| Output Signal Range | 0–20 mA / 4–20 mA | Direct integration with PLCs, DCS, and control systems |
| Galvanic Isolation | 3-way isolation (input / output / power supply) | Eliminates ground loops and protects connected equipment |
| HART Compatibility | HART signal passed through unchanged | Enables remote diagnostics and configuration without signal loss |
| Measurement Accuracy | < 0.1% of end value | Delivers precise and repeatable process measurements |
| Response Time | ≤ 0.5 ms | Supports fast-changing process signals and tight control loops |
| Supported Sensors | 2-wire, 3-wire, and 4-wire transmitters | Flexible use across multiple field device types |
| Sensor Supply | >17 V DC at 20 mA | Reliable powering of connected transmitters |
| Output Load Capacity | ≤ 550 Ω | Ensures stable operation with common control inputs |
| Supply Voltage | 20–30 V DC | Compatible with standard industrial power supplies |
| Power Consumption | Approx. 1.5 W | Energy-efficient operation in continuous-duty systems |
| Operating Temperature | –20 °C to +60 °C | Reliable performance in industrial environments |
| Mounting Method | TS 35 DIN rail | Fast installation and space-efficient panel layout |
| Housing Width | 12.5 mm | Saves valuable space in high-density control cabinets |
| Protection Class | IP20 | Suitable for protected control panel installations |
| Status Indication | Front-panel LED | Quick visual confirmation of operating status |
| Approvals | CE, UL, ATEX, IECEx, RoHS compliant | Supports global deployment and regulatory compliance |
Download Weidmuller ACT20P-CI-CO-S (7760054114) Datasheet
| Commercial Data | Details |
|---|---|
| GTIN (EAN) Number | 6944169656552 |
| Net Weight | 142 g |
1. Chemical Plant Current Loop Isolation
In chemical production facilities, analogue 4–20 mA signals from pressure, flow, and level transmitters are often exposed to electrical noise from motors, heaters, and switching equipment. The ACT20P-CI-CO-S is installed between field instruments and the control system to electrically separate the signal path. Its three-way galvanic isolation prevents ground-related interference, ensuring stable and repeatable measurements. High conversion accuracy supports consistent dosing and mixing operations, while fast response time allows immediate process adjustments. Maintenance teams can still access device diagnostics through unchanged digital communication, reducing downtime and improving overall process reliability.
2. Distributed Sensor Isolation in Water Treatment Plants
Water and wastewater facilities typically operate with sensors spread across large areas, connected by long cable runs. These installations are vulnerable to noise from pumps and environmental factors such as humidity. The ACT20P-CI-CO-S is used to isolate current signals before they reach the control cabinet, preventing ground loops that cause drifting readings. Its compact DIN-rail design fits easily into existing panels. Accurate signal conversion ensures correct chemical dosing and flow control, while remote diagnostic access supports efficient maintenance planning without frequent on-site intervention.
3. Monitoring Signal Protection in Power Generation Systems
Power generation and energy distribution environments expose analogue measurement signals to voltage fluctuations and electromagnetic disturbances. The ACT20P-CI-CO-S provides a protective isolation barrier between field sensors and sensitive control electronics. By electrically separating input, output, and power supply, it reduces the risk of signal distortion and equipment damage. Precise current reproduction maintains trustworthy monitoring data for operational decisions. Its wide temperature tolerance allows reliable use in auxiliary panels, while uninterrupted diagnostic communication supports condition monitoring and predictive maintenance programs.
4. Machine-Level Signal Conditioning in Manufacturing Lines
Automated machines depend on stable analogue feedback from position, load, and process sensors to maintain performance and safety. Shared power supplies and dense wiring can introduce unwanted interference, leading to unstable readings. The ACT20P-CI-CO-S is integrated into machine control cabinets to isolate sensor loops and stabilize current signals. Fast signal processing ensures real-time feedback without delay, supporting precise control actions. The slim housing helps machine builders optimize cabinet space, while accessible diagnostics simplify troubleshooting during commissioning and operation.
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Warranty – 1-year warranty for your peace of mind.
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