B&R 3AM055.6 Analog Input Module for X20 System

Product Overview

The B&R 3AM055.6 is a high-precision analog input module belonging to the X20 system family. This module provides multiple analog input channels (typically 4 or 8) capable of measuring voltage (±10 V, 0-10 V) and current (0-20 mA, 4-20 mA) signals from field sensors such as pressure transmitters, temperature sensors, and flow meters. The 3AM055.6 is designed for use with B&R X20 CPU modules or bus controllers, providing seamless integration into the X20 distributed I/O architecture. It is suitable for process control, machine monitoring, and data acquisition applications.

Key Features of 3AM055.6

The module features high-resolution analog-to-digital conversion, typically 16-bit, ensuring accurate measurement of small signal variations. Each channel is configurable for voltage or current mode via software or DIP switches. The inputs are electrically isolated from the system bus, preventing ground loops and protecting the controller from field-side transients. The module includes a built-in filter for noise reduction, with adjustable cutoff frequencies. Diagnostic LEDs indicate power, channel activity, and error conditions. The 3AM055.6 supports hot-swapping (X20 system) and is powered from the X20 backplane. The operating temperature range is -25 to +60°C. The module is certified for CE and UL standards.

Technical Specifications

• Manufacturer: B&R Automation

• Part Number: 3AM055.6

• Series: X20

• Product Type: Analog Input Module

• Number of Inputs: 4 or 8 (depending on variant)

• Input Ranges: ±10 V, 0-10 V, 0-20 mA, 4-20 mA (configurable)

• Resolution: 16-bit (typical)

• Isolation: Channel-to-bus isolated

• Conversion Time: < 1 ms per channel (typical)

• Filter: Programmable low-pass filter

• Indicators: Power and status LEDs

• Power Supply: 24 V DC from backplane

• Operating Temperature: -25 to +60 °C

• Storage Temperature: -40 to +85 °C

• Degree of Protection: IP20

• Mounting: DIN rail (X20 bus)

• Certifications: CE, UL

Functional Description

The 3AM055.6 converts analog signals from field sensors into digital values that are read by the X20 CPU. Each channel can be independently configured for voltage or current mode. The module provides a high-accuracy reference voltage and current source for signal conditioning. The digital values are transmitted to the CPU via the X20 bus at the configured update rate. The integrated filter reduces high-frequency noise. The module also includes wire break detection for 4-20 mA loops, alerting the system when a sensor is disconnected.

Applications

The B&R 3AM055.6 is used in industrial automation for measuring process variables such as temperature, pressure, flow, and level. It is ideal for machine monitoring, HVAC control, and process automation systems.