B&R 3AI775.6 Analog Input Module

Products Description

B&R 3AI775.6 Analog Input Module

8-Channel 0-20 mA Analog Input Module for B&R SYSTEM 2005

Key Features & Benefits

• 8 Differential Input Channels: Maximizes I/O density with a single-width module footprint, allowing connection of up to eight 0-20 mA current loop instruments 

• Differential Input Architecture: Effectively suppresses common-mode noise in electrically noisy environments—ideal for installations with long cable runs or high-EMI equipment 

• ±50 mA Overload Protection: Robust input protection prevents module damage if signals are accidentally miswired or if a 24V power supply is connected incorrectly 

• 12-Bit Successive Approximation ADC: Delivers consistent measurement accuracy with ±1 LSB non-linearity and ±0.1% basic accuracy at 25°C 

• Fast Conversion: All 8 channels convert in under 1 ms (normal mode), enabling high-speed control applications 

• Three Operating Modes: Supports cyclic measurement (with optional averaging), direct software timing, and software timing with configurable time presets (2–65.535 ms) 

• Integrated Low-Pass Filter: First-order filter with 450 Hz cutoff frequency reduces signal noise for more stable readings 

• Galvanic Isolation: Provides electrical isolation between input circuits and the PLC backplane, protecting against ground loops and fault conditions 

Technical Specifications

Operating Modes

The 3AI775.6 provides three flexible measurement modes for various application needs :

Field Wiring Guide

For reliable signal acquisition with the 3AI775.6, follow these best practices :

• Use Shielded Cables: All analog signal wiring must be shielded to protect against electromagnetic interference (EMI)

• Single-Point Grounding: Connect cable shields to the terminal block shield connections; ground at the control cabinet end only

• Short Unused Inputs: For EMC reasons, short-circuit any input channels not in use to prevent floating signals

• Terminal Block Required: The module requires a 20-pin terminal block—choose either 3TB170.9 (screw-clamp) or 3TB170.91 (push-in) 

Applications

The B&R 3AI775.6 is ideal for a wide range of industrial automation and process control applications:

System Integration

The 3AI775.6 is a screw-in module that installs on base units or expansion units within the B&R SYSTEM 2005 chassis. It integrates seamlessly with B&R controllers and CPUs via the system backplane .

Configuration: Module setup is performed in B&R Automation Studio, where users can define input scaling, select operating modes, and configure averaging parameters.

Important Note: The module does not include a terminal block. Please order one 3TB170.9 or 3TB170.91 separately for field wiring connections .

Ordering & Shipping Information