May 27, 2026

B&R 3AT450.6 Analog Input Module

The 3AT450.6 is a high‑precision analog temperature input module in the B&R SYSTEM 2005 series, designed for 4‑wire PT100 RTD sensor measurement. It provides 4 independent input channels with a measuring range of ‑50 °C to +450 °C, delivering enhanced accuracy through 4‑wire connection technology that eliminates lead resistance errors. Built with galvanic isolation and robust EMC performance, it ensures stable and reliable temperature acquisition in harsh industrial environments. The module converts resistance signals from PT100 sensors into high‑resolution digital data for the PLC, serving as a high‑end temperature sensing solution for process and factory automation.

Description

B&R 3AT450.6 Analog Input Module

Product Introduction

Basic Information

Model: 3AT450.6
Brand: B&R (Bernecker + Rainer, ABB Group)
Series: SYSTEM 2005
Product Type: Analog Temperature Input Module (RTD)
Input Channels: 4 channels, PT100 (4‑wire)
Measurement Range: ‑50 °C to +450 °C
Power Supply: 5 VDC from backplane; 24 VDC field power
Protection Class: IP20
Operating Temperature: 0 °C to +60 °C
Storage Temperature: ‑25 °C to +70 °C
Relative Humidity: 5%–95%, non‑condensing
Isolation Voltage: 2500 VAC (field to control)
Certifications: CE, UL, EAC, UKCA
Installation: Standard single slot for SYSTEM 2005 racks, DIN rail mountable
Compatible Terminal Block: 3TB170.9 (screw clamp) / 3TB170.91 (cage clamp), sold separately

Function and Positioning

The 3AT450.6 functions as the high‑accuracy interface between 4‑wire PT100 temperature sensors and B&R SYSTEM 2005 controllers. It precisely measures resistance changes of PT100 RTDs, converts them into accurate digital temperature values, and transmits data to the PLC for real‑time monitoring, data logging, or closed‑loop temperature control. The 4‑wire connection fully compensates for lead resistance, ensuring superior accuracy even with long sensor cables. Positioned as a premium high‑precision temperature input module, it is ideal for applications requiring strict thermal measurement accuracy in process industries and advanced factory automation.

Core Performance Parameters

Sensor Type: PT100 (4‑wire, RTD)
Number of Inputs: 4 independent channels
Temperature Range: ‑50 °C to +450 °C
Resolution: 16‑bit
Basic Accuracy: ±0.05 % of full scale at 25 °C
Temperature Drift: ±15 ppm/°C
Conversion Time: <250 µs per channel
Common‑Mode Rejection: >90 dB at 50/60 Hz
Input Impedance: >1 MΩ
Filter: Software‑configurable digital filter (10 Hz to 1 kHz)
Status Indicators: RUN LED (module status), CH LEDs (channel activity)
Diagnosis: Open/short‑circuit detection, out‑of‑range alarm, sensor fault monitoring
EMC Compliance: EN 61000‑6‑2, EN 61000‑6‑4
Configuration: Via B&R Automation Studio V4.x+

General Compatible Accessories

B&R SYSTEM 2005 backplanes and expansion racks
SYSTEM 2005 CPU modules and X2X bus‑compatible I/O modules
24 VDC industrial power supplies (e.g., 0PS105.1, 0PS205.1)
Shielded 4‑wire cables for PT100 sensor connection
3TB170.9 (screw clamp) / 3TB170.91 (cage clamp) terminal blocks
B&R Automation Studio V4.x+ for configuration and diagnostics
Industrial‑grade 4‑wire PT100 RTD sensors

Applicable Equipment Fields

Process Industry: Chemical, pharmaceutical, food & beverage, water treatment, pulp & paper (high‑accuracy thermal monitoring)
Factory Automation: Plastics machinery, packaging equipment, textile machines, automotive assembly lines
Energy Sector: Power plant auxiliary systems, renewable energy, HVAC, boiler control
Building Automation: Clean rooms, environmental monitoring, thermal management systems
Industrial Sites: Areas with electromagnetic interference, vibration, and wide temperature fluctuations
SYSTEM 2005‑based automation projects requiring 4‑channel PT100 (4‑wire) ultra‑high‑accuracy temperature input

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