May 27, 2026

B&R 3AT350.6 Analog Input Module

The 3AT350.6 is a high‑precision analog temperature input module belonging to the B&R SYSTEM 2005 series. It provides 4 channels of PT100 RTD inputs with 3‑wire connection, covering a measurement range of ‑50 °C to +450 °C. Designed for industrial temperature monitoring and closed‑loop control, it features galvanic isolation between control and field sides, strong EMC resistance, and a compact single‑slot design. The module converts resistance signals from PT100 sensors into high‑resolution digital data for the PLC, ensuring accurate and stable thermal measurement in harsh industrial environments.

Description

B&R 3AT350.6 Analog Input Module

Product Introduction

Basic Information

Model: 3AT350.6
Brand: B&R (Bernecker + Rainer, ABB Group)
Series: SYSTEM 2005
Product Type: Analog Temperature Input Module (RTD)
Input Channels: 4 channels, PT100 (3‑wire)
Measurement Range: ‑50 °C to +450 °C
Power Supply: 5 VDC from backplane (max 1.2 W); 24 VDC field power (max 0.8 W)
Total Power Consumption: Max 2.0 W
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 3AT350.6 acts as the dedicated interface between PT100 temperature sensors and B&R SYSTEM 2005 controllers. It precisely measures resistance variations of PT100 RTDs, converts them into digital temperature values, and transmits data to the PLC for real‑time monitoring, data logging, or closed‑loop temperature control. The 3‑wire connection compensates for lead resistance errors, ensuring accurate readings even in industrial settings with long sensor cables. Positioned as a cost‑effective, space‑saving high‑precision temperature input solution, it is ideal for multi‑point thermal monitoring in process and factory automation.

Core Performance Parameters

Sensor Type: PT100 (3‑wire, RTD)
Number of Inputs: 4 independent channels
Temperature Range: ‑50 °C to +450 °C
Resolution: 16‑bit
Basic Accuracy: ±0.1 % of full scale at 25 °C
Temperature Drift: ±20 ppm/°C
Conversion Time: <300 µs per channel
Common‑Mode Rejection: >80 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
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 3‑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
PT100 RTD sensors (3‑wire, industrial grade)

Applicable Equipment Fields

Process Industry: Chemical, pharmaceutical, food & beverage, water treatment, pulp & paper
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 (3‑wire) high‑accuracy temperature input

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