Weidmuller 8965460000 ACT20X-2SAI-2HAO-S ACT20X Series Current Output Isolator

Operating as an essential barrier in hazardous process environments, the Weidmuller 8965460000 ACT20X-2SAI-2HAO-S provides high-integrity galvanic isolation and signal conversion for analog current loops. This dual-channel module isolates and converts standard current signals, ensuring safe and precise transmission between field devices in explosive atmospheres and safe-area control systems. Configured via standard FDT/DTM software, it delivers an exceptional accuracy of less than 0.1% of span and a rapid step response time of 5 milliseconds or less, making it highly suitable for critical control loops.

Key Features

• Dual-channel isolation (2SAI-2HAO) for space-saving DIN-rail density.
• Comprehensive diagnostic alarm functions for signal limit violations, input line interruptions, power loss, and internal device errors.
• Integrated alarm relay output supporting nominal switching voltages up to 125V AC or 110V DC.
• Software-driven parameterization using FDT/DTM frameworks for precise calibration and monitoring.
• Robust IP20 housing with secure screw connection terminals for reliable field wiring.

Industrial Applications

• Intrinsically safe signal isolation in chemical and petrochemical processing plants.
• Field instrument coupling in oil and gas extraction and refining facilities.
• Analog signal conditioning in municipal water and wastewater treatment systems.
• Distributed Control System (DCS) and PLC analog I/O protection in heavy manufacturing.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

The ACT20X-2SAI-2HAO-S is a direct fit for applications requiring dual-channel analog isolation with intrinsic safety ratings. When upgrading older ACT20M or non-Ex isolators, verify that the DIN rail spacing accommodates the 22.5 mm width of this module. Ensure that the latest Weidmuller DTM library is installed in your FDT frame application (such as WI-Manager) to recognize the firmware revision of this device.

Application Pitfalls & Engineering Notes

When installing multiple ACT20X modules side-by-side in high-density control enclosures, calculate the cumulative thermal load. Each module dissipates up to 1.8W under full load. Maintain a minimum clearance or ensure active panel ventilation if ambient temperatures inside the cabinet regularly exceed 50 degC. Note that while the integrated alarm relay is rated for 125V AC, inductive loads must be equipped with external flyback diodes or RC snubbers to prevent contact welding.

Commissioning & Wiring Tips

Configuration must be performed using the dedicated Weidmuller interface cable connected to the front-panel service port. To prevent ground loops and potential damage to your configuration PC, do not connect field-side wiring while the USB configuration cable is active. Always ensure that the field-side intrinsically safe wiring is physically segregated from non-intrinsically safe wiring in compliance with local electrical codes (e.g., NEC Article 504 or EN 60079-14).

Installation Guidelines