Description

The B&R 7AI261.7 is a high-density, 16-channel analog input module engineered for precision measurement in distributed automation architectures. As part of B&R Automation’s (now ABB) X20 System, this module excels in converting field-level analog signals (4–20 mA, 0–10 V) into high-resolution digital data for real-time process monitoring and control. Designed for machine builders and plant operators, the 7AI261.7 delivers exceptional signal integrity with 16-bit resolution and channel-to-channel isolation (1500 V AC), eliminating cross-talk in multi-sensor environments. Its core value lies in maximizing I/O density while minimizing cabinet footprint—critical for space-constrained installations like packaging lines or robotic cells.

Leveraging B&R’s X2X Link technology, the module achieves microsecond-synchronized data exchange with controllers, enabling precise closed-loop control for motion or temperature regulation. The B&R 7AI261.7 supports direct integration with B&R’s Automation Studio engineering environment, allowing seamless parameterization, diagnostics, and oversampling configurations. Built for industrial resilience, it operates flawlessly in temperatures from -40°C to +60°C and withstands severe vibration (5 g, 10–150 Hz). As a cornerstone of B&R’s modular I/O ecosystem, the 7AI261.7 empowers engineers to scale measurement systems efficiently while maintaining deterministic performance in high-speed applications.

7AI261.7 B&R

Technical Specifications

Parameter Name	Parameter Value
Product Model	7AI261.7
Manufacturer	B&R Automation (ABB Group)
Product Type	Analog Input Module
Number of Channels	16
Input Types Supported	4–20 mA, 0–10 V (Software-Selectable per Channel)
Resolution	16-bit
Accuracy	≤ ±0.1% of Full Scale
Channel Isolation	1500 V AC (Channel-to-Channel and Field-to-Bus)
Sampling Rate	10 ms per Channel (All Channels)
Common-Mode Rejection	>120 dB at 50/60 Hz
Connection Interface	X2X Link (Front-Mountable)
Operating Voltage	24 V DC (-15%/+20%)
Operating Temperature	-40°C to +60°C
Vibration Resistance	5 g (10–150 Hz)
Certifications	CE, UL, IEC 61131-2

Main Features and Advantages

Unmatched Signal Integrity: The B&R 7AI261.7 shatters density barriers without compromising precision. Its 16 isolated channels prevent ground loops and electromagnetic interference (EMI), even when mixing sensor types (e.g., load cells alongside temperature transmitters). The 16-bit ADC ensures resolution down to 0.3 µA for 4–20 mA signals, enabling detection of minute process deviations. Built-in diagnostics monitor wire breaks, short circuits, and out-of-range signals, triggering alarms in B&R’s Automation Studio for rapid troubleshooting.

Deterministic Performance: Leveraging B&R’s X2X Link technology, the module achieves deterministic data transfer with ≤10 µs jitter. This enables tight synchronization across multiple I/O modules—essential for high-speed applications like printing registration control or synchronous sampling in test benches. The module’s oversampling capability (up to 1 kHz per channel) captures transient events missed by conventional PLCs.

Engineering Efficiency: The 7AI261.7 reduces commissioning time through plug-and-play operation with B&R controllers. Channels are individually configurable via Automation Studio: users assign ranges (mA/V), filtering, and scaling without hardware jumpers. Front-accessible connectors simplify wiring and module replacement. Hot-swappable design allows maintenance during operation, minimizing production downtime. Combined with IP20 protection and a compact 25 mm width, this module delivers maximum I/O density per DIN rail meter, slashing panel costs by up to 30% compared to traditional systems.

Application Field

The B&R 7AI261.7 thrives in industries demanding high-channel-count analog monitoring with zero tolerance for signal drift. In automotive manufacturing, it orchestrates precision welding robots by synchronizing pressure and position feedback from 100+ sensors across body-in-white assembly lines. Pharmaceutical batch processes rely on its isolation to monitor bioreactor pH, dissolved oxygen, and temperature in FDA-compliant GMP environments.

Energy sector applications include wind turbine condition monitoring, where the module acquires vibration data from 16 accelerometers simultaneously, detecting blade imbalances before failures occur. In food & beverage, it tracks fill levels, viscosity, and thermal profiles in CIP (Clean-in-Place) systems, ensuring recipe consistency. The B&R 7AI261.7 also enables real-time quality control in electronics production—measuring solder paste thickness via laser sensors or testing PCB power consumption. Its rugged design suits mobile machinery (e.g., hydraulic cylinder pressure monitoring in excavators) and harsh environments like steel mills, where it withstands electromagnetic noise from induction furnaces while capturing thermocouple data.

7AI261.7 B&R

Related Products

B&R 7AO462.2: Analog Output Module (8-channel, ±10 V/0–20 mA), ideal for closed-loop control valves paired with 7AI261.7 inputs.

B&R X20BC0083: Bus Controller for X20 system, managing data exchange between I/O modules and CPU.

B&R 7AI350.2: Thermocouple/RTD Input Module, expands temperature measurement options.

B&R 7DI477.2: Digital Input Module (32-channel, 24 V DC), complements analog monitoring with status signals.

B&R X20PS9400: System Power Supply (24 V DC), powers X20 backplane and modules.

B&R 7CN110.00: Communication Interface (PROFINET IRT), integrates X20 into factory networks.

B&R 7AC1131.6: Counter Module, captures encoder pulses for motion-synchronized analog sampling.

B&R Automation Panel: HMI series for visualizing analog trends from 7AI261.7 data.