PLCs, Power Supplies & Others

Technical Specifications Overview

Functional Overview and Signal Conversion

This shunt resistor adapter converts current loop signals into voltage inputs for analog modules. It accepts standard 0–20 mA or 4–20 mA signals from field transmitters. The TSXAAK2 then produces a proportional 0–5 VDC voltage for the PLC analog input. Moreover, the module provides two independent channels for dual-signal applications. This compact solution eliminates the need for external precision resistors in the field. The adapter mounts directly on the DIN rail adjacent to the PLC system. Consequently, engineers reduce wiring complexity and installation errors significantly.

Electrical Characteristics and Conversion Accuracy

The Schneider TSXAAK2 uses a precision 250 Ω resistor with ±1% tolerance for accurate conversion. This value produces a 1 VDC output for every 4 mA of loop current. A 4–20 mA signal therefore converts to 1–5 VDC for easy scaling. The 0.25 W power rating handles continuous operation without overheating. The ±50 ppm/°C temperature coefficient ensures stable conversion across ambient changes. Furthermore, the adapter offers ±0.1% accuracy for precise process measurement. This performance meets the demands of most industrial control applications.

Dual-Channel Configuration and Wiring Details

The module accommodates two independent current loops in a single compact housing. Each channel operates separately with its own pair of terminals. This design allows monitoring of two different transmitters simultaneously. The common ground connection simplifies wiring for PLC analog input modules. The adapter requires no external power supply for its operation. You simply connect the current loop through the terminals. The output voltage then routes directly to the analog input card.

Physical Architecture and Mounting Specifications

The module measures 32 mm x 100 mm x 70 mm (1.3″ x 3.9″ x 2.8″) and weighs only 0.08 kg. Its extremely lightweight construction simplifies handling and mounting. The front panel provides a removable 8-pin terminal block for field wiring. This terminal accepts wire sizes from 0.5 to 1.5 mm². The adapter mounts on standard DIN rails using the integrated clip. Alternatively, you can panel-mount the unit with optional hardware. The small footprint suits even the most crowded control cabinets.

Protection Requirements and Safety Considerations

The passive design includes no internal overcurrent protection circuits. Therefore, you must install a 100 mA fuse on each channel externally. This fuse protects the resistor from accidental overcurrent conditions. The adapter also lacks galvanic isolation between channels and the PLC. Consequently, you must ensure proper grounding for the current loop. The module operates reliably within the specified current range only. Exceeding the maximum current will permanently damage the internal resistor.

Integration with Schneider PLC Systems

This adapter interfaces directly with Modicon TSX Micro and Premium analog modules. It works seamlessly with 4–20 mA transmitters in temperature, pressure, and flow applications. The TSXAAK2 also serves as a standard accessory for many Schneider kits. The 1–5 VDC output simplifies scaling in PLC programming software. You can define engineering units directly in the analog input configuration. This direct scaling reduces programming effort and potential errors.

Environmental Conditions and Certifications

The adapter operates reliably from 0°C to +55°C ambient temperature. Storage temperatures range from -25°C to +70°C. The unit carries CE, UL, and CSA certifications for global industrial use. Install the adapter in a clean, dry control cabinet. The product also complies with IEC 61131-2 standards for programmable controller accessories.

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