Product Description for B&R 7AI351.70 System 2003 Analog Input Module

7AI351.70 is a single-channel screw-in analog input sub-module exclusively designed for B&R System 2003 automation control platforms. It inserts into the slots of 7AF104.7 high-speed adapter base to collect standard industrial analog signals and convert them into digital data transmissible over the System 2003 proprietary internal bus to host CPU units. Manufactured in Austria, the module holds CE and UL/cULus safety certifications for global industrial deployment. The entire System 2003 hardware line has been officially marked end-of-life by B&R headquarters; available stock consists of original unopened new units and fully function-tested refurbished modules for legacy production line maintenance, equipment retrofits and emergency spare part replacement projects. This compact signal conversion unit supports both voltage and current input modes with built-in high-frequency filtering to suppress cabinet electromagnetic interference.

The official full part designation is 7AI351.70, categorized as 1-channel universal analog screw-in input sub-module for the 7AF series adapter base architecture of System 2003B& R Industrial Automation. The module is delivered as a standalone bare unit; the matching 12-pin wiring terminal block (model 7TB712.9 screw-clamp or 7TB712.91 cage-clamp) must be ordered separately as a mandatory fitting accessory for field sensor wiring connectionB& R Industrial Automation. Permanent laser etching of B&R logo, complete part number, hardware revision code, serial number and production batch code is printed on the rear plastic housing for full factory traceability and authenticity verification. Power supply is routed through the 7AF104.7 adapter base via the System 2003 24 V DC backplane bus, with fixed low power consumption rated at 0.3 Watts for continuous long-duration operation. The net weight of one single module is approximately 0.11 kg, with a slim form factor engineered to precisely fit one individual slot position of the four-slot 7AF104.7 adapter base. For international customs clearance, it falls under the tariff classification of industrial PLC analog signal acquisition sub-components. Minimal LED indicators on the front shell display power feed status and channel fault alarm signals for quick visual diagnosis.

The core functional role of 7AI351.70 is high-fidelity conversion of single-channel analog field signals into 12-bit plus sign digital values readable by System 2003 PCC CPUs. It accepts two mainstream industrial signal formats: bipolar ±10 V voltage signals and 0–20 mA loop current signals transmitted from pressure transmitters, flow sensors, displacement transducers and temperature transmitters on production machineryB& R Industrial Automation. Integrated high-performance filtering circuit delivers 225 kHz cutoff frequency and 60 dB attenuation to block high-frequency noise generated by inverters, servo drives and contactors inside electrical cabinets, effectively preventing measurement fluctuation and signal distortion. Converted digital measurement data is synchronously forwarded to the host controller to support closed-loop process regulation, threshold fault triggering, real-time value display on 7AI261 series touch HMIs, and historical data logging. Multiple 7AF104.7 adapter bases can be mounted on the same System 2003 backplane; each base can accommodate up to four pieces of 7AI351.70 modules to expand total analog input channel capacity as required by system design. Vacant rack bus expansion slots without adapter bases are sealed with 7AC020.9 bus covers to preserve cabinet dust protection and rack structural stability. All channel signal range selection, scaling, filter strength and fault threshold parameters are configured and downloaded centrally via B&R Automation Studio software connected to the System 2003 CPU, requiring no manual hardware trimming or calibration adjustments on the module itself.

The module features one fully differential analog input channel with dual selectable signal ranges: ±10 V DC voltage and 0–20 mA DC current. Its analog-to-digital converter provides 12-bit resolution with sign bit for accurate signal quantification, meeting standard precision requirements for general industrial process monitoring and closed-loop control. Built-in signal filter specifications include 225 kHz cutoff frequency and 60 dB interference attenuation to stabilize readings in electrically noisy cabinet environments. Internal protective circuits guard against overvoltage, overcurrent and reverse polarity wiring faults to prevent permanent module damage from field installation errors. The flame-retardant reinforced plastic housing conforms to IP20 ingress protection rating, designated solely for installation inside enclosed indoor electrical control cabinets. Continuous stable operating ambient temperature spans 0 °C to +60 °C; storage and transportation temperature tolerance extends widely from -25 °C up to +70 °C for warehouse stock and cross-border logistics transit. Gold-plated rear insertion contact pins deliver low-resistance, vibration-proof electrical connection with the 7AF104.7 adapter base slots, suited for 24/7 non-stop factory operation under mechanical vibration from processing equipment. No independent onboard firmware storage exists; all operational logic and configuration settings are managed remotely by the host System 2003 CPU via the high-speed internal backplane bus. The matched 7TB712 terminal blocks support 1.5 mm² cross-section sensor cable conductors for secure screw-clamp wiring without field soldering operationsB& R Industrial Automation.

7AI351.70 is strictly locked into the B&R System 2003 hardware ecosystem and cannot be mechanically or electrically interchanged with analog sub-modules from X20, X67, APC or ACOPOS newer product series. It is only compatible for plug-in mounting into the four standard slot openings of the 7AF104.7 high-speed analog adapter base as a dedicated screw-in sub-moduleB& R Industrial Automation. It operates seamlessly alongside the full lineup of System 2003 supporting hardware: 7CP series PCC CPU controllers, digital input/output modules, 7AI294.7 potentiometer analog sub-modules, 7AC911.9 CAN bus communication connectors, 7AC020.9 blank bus slot covers and 7AI261 series color touch HMI panels. No extra mounting brackets, power transformers or external signal isolators are necessary for standard assembly; tool-free insertion into the adapter base slots drastically reduces on-site installation time. Shielded twisted-pair sensor cables are strongly recommended for field wiring to further minimize electromagnetic signal interference in heavy-duty workshop environments. Mandatory matching wiring accessories include 7TB712.9 screw terminal blocks or 7TB712.91 cage-clamp terminal blocks, which must be purchased separately for connecting field transmitters to the moduleB& R Industrial Automation. When distributed multi-station CAN bus networking is needed for long production line layouts, 7AC911.9 bus connectors are fitted to communication module positions on the same rack backplane.

This universal analog input sub-module is deployed exclusively within automation control stations built on the B&R System 2003 PCC architecture. Primary discrete manufacturing application machinery includes plastic injection molding presses, packaging and filling production lines, textile spinning and weaving looms, CNC metal cutting machine tools, commercial offset printing equipment and automated assembly machinery requiring multi-type analog sensor signal collection. It also serves auxiliary process control systems for food and beverage processing equipment, municipal water treatment pump stations, automated material conveyor positioning systems and small hydraulic/pneumatic actuator closed-loop regulation loops. Installation is restricted to IP20-rated indoor electrical control cabinets in factory workshops and sheltered semi-outdoor machinery housings. It is not rated for direct deployment in environments with corrosive chemical vapors, persistent high humidity, flammable explosive hazardous atmospheres or fully exposed outdoor locations unless paired with additional fully sealed upgraded protective cabinet enclosures.

Genuine original 7AI351.70 modules carry complete unique serial number marking archived within B&R’s official production database for full traceability. Since the System 2003 platform has reached official end-of-life status, product supply channels are limited to authorized global industrial spare part distributors. Refurbished sub-modules undergo rigorous multi-step pre-delivery testing: insertion contact continuity verification, full voltage/current channel accuracy calibration, filter performance inspection, communication stability testing with 7AF104.7 adapter base, and LED fault indicator function validation, typically covered by supplier warranty terms ranging from 12 to 24 months. Standard onsite commissioning workflow consists of plugging the module into a vacant 7AF104.7 slot, fitting the separate 7TB712 terminal block, wiring field analog sensors, and uploading configuration parameters through Automation Studio software; disassembly of internal circuit boards or unauthorized hardware calibration adjustments are strictly prohibited during installation and maintenance. Long-term storage must be maintained in dry, temperature-stabilized warehouse environments to prevent plastic casing embrittlement and oxidation of metal contact pins and terminal screws. During equipment maintenance replacement, field technicians must fully verify compatibility with the System 2003 platform and 7AF104.7 adapter base to avoid mismatches with incompatible newer generations of B&R control hardware architectures.