May 27, 2026

B&R 3AI775.6 Analog Input Module

The 3AI775.6 is a high-density analog input module from B&R’s SYSTEM 2005 series, designed for reliable acquisition of 0–20 mA current signals in industrial automation. It provides 8 single-ended current input channels with 12-bit resolution, featuring galvanic isolation between field circuits and the PLC backplane. Optimized for current-based sensor integration in noisy industrial environments, it delivers stable and precise digital data for process monitoring and closed-loop control.

Description

B&R 3AI775.6 Analog Input Module

Product Introduction

Basic Information

Model: 3AI775.6
Brand: B&R (Bernecker + Rainer, ABB Group)
Series: SYSTEM 2005
Product Type: 8-Channel Analog Input Module
Input Range: 0–20 mA DC, single-ended
Resolution: 12-bit
Power Supply: 24 VDC (field), 5 VDC (backplane)
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: 2,500 VAC (channel to PLC backplane)
Certifications: CE, cULus, EAC
Mounting: Single-width slot in SYSTEM 2005 racks
Terminal Block: TB170 (ordered separately)

Function and Positioning

The 3AI775.6 serves as a high-efficiency current signal acquisition hub for SYSTEM 2005 controllers, specifically optimized for 0–20 mA transmitters and sensors. It converts analog current signals into accurate digital values for the PLC, supporting real-time monitoring of pressure, level, flow, and temperature variables. Galvanic isolation protects the control system from electrical noise and voltage spikes, while the 8-channel design ensures high I/O density for space-saving system layouts. It acts as a critical link between analog field devices and digital control logic, enabling reliable data acquisition for precise process control decisions.

Core Performance Parameters

Number of Channels: 8 single-ended analog inputs
Input Signal: 0–20 mA DC
Resolution: 12-bit (4096 steps)
Conversion Time: 250 µs (all channels)
Basic Accuracy: ±0.25% of full scale at 20°C
Temperature Coefficient: ±50 ppm/°C
Input Impedance: 250 Ω
Isolation Voltage: 2,500 VAC (channel to backplane)
Status Indicators: LEDs for module status, activity, and diagnostics
Diagnostics: Module health and fault detection via software
EMC Compliance: EN 61000-6-2, EN 61000-6-4
Configuration: Via B&R Automation Studio V4.x and above
Averaging: Optional internal averaging for stable measurements

General Compatible Accessories

B&R SYSTEM 2005 series backplanes and 6/9/12/15-slot racks
B&R SYSTEM 2005 series CPU modules (CP260) and interface modules (IF260/IF060)
24 VDC industrial power supplies (0PS105.1, 0PS205.1)
Shielded analog signal cables (0G0002.00-090)
Terminal block TB170 (required for field wiring, sold separately)
B&R Automation Studio V4.x and above for programming and diagnosis
Application memory modules (2ME903.90-1) for program storage

Applicable Equipment Fields

Factory Automation: Automotive assembly lines, packaging machinery, machine tools
Process Control: Food and beverage, pharmaceutical, chemical, and water treatment plants
Energy Management: Power monitoring, renewable energy systems, energy efficiency control
Building Automation: HVAC systems, environmental monitoring, facility management
Motion Control: Analog sensor feedback for servo systems and frequency converters
Harsh Environments: Manufacturing workshops, high-vibration sites, electrical noise-intensive areas
General Automation: Any SYSTEM 2005 application requiring high-density 0–20 mA analog input acquisition

Contact Info