3AT450.6 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 3AT450.6 is part of the System 2005 Controllers series and is designed for resistance measurement input, supporting PT100 sensor types and a 4-line sensor connection. It has a resolution of 13,500 steps, an automatic in-module linearization feature, and utilizes a Bessel 1st-order 8 Hz input filter. The module also provides input to PLC isolation and operates with a total power consumption of 4 watts.
Internal Product Review
The 3AT450.6 is a System 2005 resistance measurement controller from B & R Automation with 4 inputs for PT100 sensors. Automatic in-module linearization and 13500-step resolution support clean, dependable temperature acquisition in control systems. Input-to-PLC isolation adds confidence during integration, making the unit a strong choice for precise thermal monitoring.
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Product Description:
The 3AT450.6 module is a resistance-measurement input card produced by B&R Automation for the System 2005 Controllers series. Mounted beside the CPU, it digitizes temperature-dependent resistances so the control program can supervise process heat, start cooling fans, or safeguard equipment. Conditioned data is delivered to the backplane without external transducers, reducing wiring complexity in industrial cabinets. This makes it suitable for machine tools, packaging lines, and HVAC installations that demand precise thermal monitoring.
Each of the four channels performs resistance acquisition through a constant measurement current of 2.5 mA, and the input type is dedicated to resistance measurement rather than voltage or thermocouple signals. The sensor wiring uses a 4-wire configuration that compensates for lead resistance, and the module applies a first-order Bessel filter with a cutoff at 8 Hz to suppress high-frequency noise before conversion. Resolution reaches 13500 steps, enabling fine discrimination of small resistance changes, while basic accuracy at 20 °C is held within ±0.1%. Automatic linearization inside the module maps raw resistance to temperature without additional PLC code, and an integrated converter handles the sampling procedure.
The module accepts 4 inputs, and although there is no input-to-input isolation, it provides input-to-PLC isolation so the backplane circuitry remains protected from electrical transients. Long-term precision from 0 °C to 60 °C remains within ±0.15%, meeting typical plant accuracy targets. When paired with PT100 sensors that conform to IEC/EN 60751, it outputs standardized temperature data consistent across multiple systems. Power draw is only 4 W, which simplifies enclosure cooling calculations while leaving ample capacity for additional I/O cards.
