May 27, 2026

B&R 3AM374.6 Analog Input and Output Module

The 3AM374.6 is a versatile analog input and output module developed for the B&R SYSTEM 2005 series. It is designed to handle mixed voltage and current analog signals for industrial automation applications. This module is equipped with 4 input channels and 4 output channels, which can be configured in groups to support 0–10 V voltage or 0–20 mA current signals. All channels adopt 12-bit high resolution. With 2500 VAC galvanic isolation and IP20 protection, it operates steadily in complex industrial environments featuring electromagnetic interference and mechanical vibration. The compact single-slot structure helps save cabinet space and streamline system layout, making it a reliable universal analog I/O component for SYSTEM 2005 control platforms.

Description

B&R 3AM374.6 Analog Input and Output Module

Product Introduction

Basic Information

Model: 3AM374.6
Brand: B&R (Bernecker + Rainer, ABB Group)
Series: SYSTEM 2005
Product Type: Analog Input and Output Module
Analog Inputs: 4 channels divided into 2 groups, configurable for 0–10 V DC or 0–20 mA, 12-bit resolution
Analog Outputs: 4 channels divided into 2 groups, configurable for ±10 V DC or 0–20 mA, 12-bit resolution with short-circuit protection
Power Supply: 5 VDC supplied by backplane, 24 VDC supplied by field power
Total Power Consumption: 6.5 W
Protection Class: IP20
Operating Temperature: 0 °C to +60 °C
Storage Temperature: -25 °C to +70 °C
Relative Humidity: 5% to 95%, non-condensing
Isolation Voltage: 2500 VAC between field side and control backplane
Certifications: CE, UL, EAC, UKCA
Installation: Fits standard single slot of SYSTEM 2005 racks and supports DIN rail mounting
Matching Terminal Block: 3TB170.9 and 3TB170.91, sold separately

Function and Positioning

The 3AM374.6 acts as a key signal interface connecting the main controller and field devices. Its input channels collect voltage or current signals from on-site sensors such as temperature, pressure, flow and level transmitters, and convert analog signals into digital data for the controller to implement real-time monitoring and closed-loop regulation. The output channels convert digital control commands into standard analog signals to drive field actuators including proportional valves, frequency converters and servo units. Thanks to group-based signal configuration, it can adapt to diverse analog signal requirements on site. By integrating input and output functions, it reduces the quantity of separate modules and wiring workload. It is positioned as a flexible and cost-effective integrated analog solution for various industrial automation projects.

Core Performance Parameters

Channel Layout: 4 analog inputs and 4 analog outputs with group-based signal configuration
Resolution: 12-bit for all input and output channels
Conversion Time: Less than 1 ms for all channels; less than 1.5 ms when signal averaging is enabled
Basic Accuracy: ±0.05% full scale for inputs, ±0.02% full scale for outputs at 25 °C
Temperature Drift: ±50 ppm/°C
Input Impedance: 2 MΩ for voltage mode, 100 Ω for current mode
Protection Features: Input overvoltage and overcurrent protection, output short-circuit protection
Operating Modes: Cyclic sampling, signal averaging, adjustable timing range from 2 ms to 65.535 ms
Status Indication: Onboard LED indicators for module running status and channel status
Fault Diagnosis: Complete fault detection and diagnosis function supported by dedicated software
EMC Compliance: EN 61000-6-2 and EN 61000-6-4
Configuration: Parameter setting and debugging via B&R Automation Studio V4.x and above

General Compatible Accessories

B&R SYSTEM 2005 series backplanes and multi-slot expansion racks
SYSTEM 2005 series CPU modules and X2X bus compatible I/O modules
24 VDC industrial power supplies such as 0PS105.1 and 0PS205.1
Shielded cables dedicated for analog signal transmission
3TB170.9 and 3TB170.91 terminal blocks for field wiring connection
B&R Automation Studio V4.x and above for programming, configuration and maintenance
0–10 V and 0–20 mA industrial sensors for process parameter detection
±10 V and 0–20 mA driven actuators including proportional valves, frequency converters and servo drives

Applicable Equipment Fields

Factory Automation: Packaging machinery, machine tools, automotive assembly lines and general production equipment
Process Industry: Chemical, pharmaceutical, food and beverage, water treatment, papermaking and textile facilities
Energy Sector: Power plant monitoring, renewable energy equipment and energy efficiency control systems
Motion Control: Auxiliary control of servo systems, frequency converters and positioning devices
Building Automation: HVAC systems, environmental monitoring and building automatic control systems
General Industrial Sites: Production workshops with strong electromagnetic interference and mechanical vibration
All automation projects based on B&R SYSTEM 2005 platform requiring configurable analog input and output functions

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