Product Description for B&R 7AI261.7 Analog Input Module

7AI261.7 is a high-precision analog input module belonging to B&R System 2003 control platform, designed for multi-channel analog signal collection and digital conversion for PLC closed-loop control and process monitoring. It adopts a compact rack-mount modular structure, directly pluggable onto System 2003 backplanes to transmit converted digital measurement data to host CPU units via the proprietary internal rack bus. Manufactured in Austria, the module holds CE and UKCA industrial compliance certifications. As part of the discontinued System 2003 hardware lineup, available supplies consist of original unopened new stock and fully validated refurbished units for legacy production line maintenance, equipment retrofit and spare part replacement projects. This module supports universal voltage signal acquisition, with built-in isolation circuits to strengthen anti-interference performance inside high-noise electrical cabinets.

Official full part number is 7AI261.7, classified as 7-channel analog input expansion module for System 2003 rack architecture. The module is supplied as a standalone unit without external wiring terminals, signal cables or auxiliary mounting fittings. Permanent laser engraving of B&R brand logo, complete part number, hardware revision, serial number and production batch code is marked on the rear plastic housing for authenticity and full production traceability. Standard power input is 24 V DC industrial control power supplied through the System 2003 backplane bus; typical operating current consumption stands at approximately 120 mA. Overall physical dimensions are 30 mm × 100 mm × 115 mm, with a net weight around 100 grams for lightweight rack stacking. For international customs clearance, it falls under the tariff category of industrial PLC analog input I/O modules. The front panel integrates status LED indicators to display module power, bus communication link and channel fault alarms at a glance.

The core function of 7AI261.7 is converting continuous analog voltage signals from field sensors and transmitters into digital data readable by System 2003 CPU controllers. Equipped with seven independent input channels, it undertakes real-time measurement of pressure, temperature, flow rate, liquid level, displacement and other process variables in automated machinery and process systems. Each channel features electrical isolation to block interference noise generated by inverters, servo drives and contactors within control cabinets, preventing signal distortion and module damage from voltage surges. Sampled digital data is synchronously uploaded to the host CPU to support high-speed closed-loop regulation, fault threshold comparison and historical data logging. Multiple 7AI261.7 modules can be arranged on the same backplane alongside 7AF104.7 high-speed adapters, digital I/O modules, 7AC911.9 CAN bus connectors and 7CP series CPUs to expand total analog acquisition capacity. Vacant rack bus slots not occupied by I/O modules are sealed with 7AC020.9 bus covers to maintain cabinet dust protection and rack structural stability. All channel scaling, filtering and fault diagnosis parameters are configured uniformly through B&R Automation Studio software connected to the host PLC, no local hardware adjustment required.

This module provides seven analog input channels with a selectable voltage signal range covering ±10 V, ±5 V, 0–10 V and 0–5 V to match mainstream industrial voltage output sensors. It uses a 16-bit analog-to-digital converter, delivering a measurement accuracy of ±0.1% full scale for stable precision control. Per-channel sampling rate reaches 1 millisecond, supporting fast dynamic signal capture for high-response motion and process loops. Input impedance exceeds 1 MΩ to minimize load impact on front-end sensor transmitters, and channel isolation voltage is rated at 500 V to resist transient voltage spikes. The flame-retardant reinforced plastic casing carries an IP20 protection rating, designated exclusively for installation inside enclosed indoor electrical control cabinets. Continuous stable operating ambient temperature ranges from 0 °C to +55 °C; extended storage and transportation temperature tolerance spans -25 °C to +85 °C. Gold-plated backplane contact pins ensure vibration-resistant, low-resistance electrical connection with the System 2003 rack bus, suitable for continuous 24/7 factory operation with mechanical vibration from production equipment. No on-board programmable firmware storage exists; all operational logic and channel settings are managed centrally by the System 2003 host CPU.

7AI261.7 is fully locked to the B&R System 2003 hardware ecosystem and cannot be mechanically or electrically interchanged with X20, X67, APC or ACOPOS series I/O modules of newer B&R platforms. It seamlessly pairs with all standard System 2003 rack components: 7CP series CPU controllers, 7AF104.7 high-speed analog adapter bases, digital input/output modules, 7AC911.9 CAN bus communication connectors and 7AC020.9 blank bus slot covers. Tool-free insertion and locking onto DIN rail backplanes is enabled by integrated plastic latches, requiring no extra mounting brackets or fixing screws. Shielded twisted-pair sensor cables are strongly recommended for field wiring to further suppress electromagnetic interference in noisy workshop environments. Standard screw terminal wiring accessories for analog signal connection are purchased separately as auxiliary parts. When distributed multi-station CAN bus networking is required, 7AC911.9 connectors are fitted to communication module positions on the same rack frame.

This multi-channel analog input module is deployed solely within automation control stations built on the B&R System 2003 PLC architecture. Primary discrete manufacturing application sectors include plastic injection molding machines, packaging and filling production lines, textile spinning and weaving looms, CNC metal cutting machine tools, commercial printing presses and automated assembly equipment requiring precise process variable measurement. It also supports auxiliary process control systems for food and beverage processing lines, municipal water treatment pump stations, automated material conveyor handling systems and small-scale auxiliary machinery control loops. Installation is limited to IP20-rated indoor electrical cabinets in factory workshops and sheltered semi-outdoor machinery housings. It is not suitable for direct deployment in environments with corrosive fumes, persistent high humidity, flammable explosive hazardous atmospheres or fully exposed outdoor locations without upgraded fully sealed protective cabinet enclosures.

Genuine original 7AI261.7 modules retain complete factory traceability markings on the housing, with unique serial numbers archived in B&R production records. Since the System 2003 platform has reached official end-of-life, product supply relies on authorized global industrial spare part distributors. Refurbished analog input modules undergo comprehensive pre-delivery testing including backplane communication stability verification, full seven-channel signal accuracy calibration, isolation voltage testing and LED diagnostic function inspection, generally covered by supplier warranty terms of 12 to 24 months. Onsite commissioning steps only involve rack insertion, field sensor wiring and parameter configuration via Automation Studio; internal circuit disassembly or hardware calibration adjustments are prohibited during installation. Long-term storage must be maintained in dry, temperature-stabilized warehouse conditions to prevent plastic casing embrittlement and oxidation of metal contact pins. During maintenance replacement, field technicians must strictly confirm System 2003 platform compatibility to avoid mismatches with incompatible newer generations of B&R control hardware.