Product Description for B&R 7AM351.7 Mixed Analog I/O Submodule

7AM351.7 is a screw-in mixed analog input and output submodule designed for the B&R System 2003 automation control platform. It is installed into the slots of the 7AF104.7 high-speed analog adapter base, collecting analog measurement signals from field sensors and converting digital control commands from the System 2003 CPU into standard analog drive signals for on-site actuators. Data exchange between the module and main controller relies on the platform’s proprietary internal backplane bus. Manufactured in Austria, the module passes CE and UL/cULus industrial safety certifications for worldwide factory deployment. The System 2003 hardware series has reached official end-of-life status from B&R. Available stock includes original factory-new imported modules and fully function-verified refurbished units for legacy production line maintenance, equipment retrofits and emergency spare part replacement. Built-in EMI filter circuits and multi-stage electrical protection deliver stable signal conversion performance in electrical cabinets with heavy interference from inverters, servo drives and contactors.

The official part number is 7AM351.7, categorized as mixed analog I/O screw-type submodule compatible with the four-slot 7AF104.7 adapter base of System 2003. The module is delivered as a standalone unit without pre-mounted terminal blocks, signal cables or mounting hardware. Separate 12-pin terminal blocks are required for field wiring, with screw-clamp model 7TB712.9 and cage-clamp model 7TB712.91 as matching accessories. Permanent laser marking on the rear plastic housing displays the B&R logo, complete part number, hardware revision code, unique serial number and production batch code to support full production traceability and authenticity verification. Power is supplied via the 7AF104.7 adapter base from the System 2003 24 V DC backplane bus, featuring low continuous power consumption suitable for 24-hour non-stop industrial operation. Its slim form factor occupies exactly one slot position of the four-slot 7AF104.7 adapter base, enabling compact dense rack stacking. For international customs clearance, it falls under the tariff classification of industrial PLC mixed analog signal input and output sub-components. Compact LED indicators on the front panel offer real-time visual feedback for module power status, backplane communication connection and channel fault alarms to accelerate on-site troubleshooting.

This mixed module integrates analog signal acquisition and analog control output to serve compact automation stations requiring both process monitoring and closed-loop actuator regulation. The analog input channel receives standard voltage and loop current signals from pressure transmitters, flow meters, displacement transducers and temperature sensors, translating continuous analog physical values into high-resolution digital data readable by System 2003 control programs. The analog output channel converts digital setpoints sent by the host CPU into standardized analog voltage or current signals to drive proportional valves, heating regulators, speed adjustment actuators and other analog execution devices. Internal high-frequency filter circuits suppress cabinet electromagnetic noise to prevent unstable input sampling values and distorted output control signals. Synchronized bidirectional digital data transmission with the CPU supports closed-loop process adjustment, over-limit fault interlock protection, real-time value display on matched 7AI261 series touch HMIs and long-term operational data logging. Multiple 7AF104.7 adapter bases can be mounted on a single System 2003 backplane; each base can hold up to four 7AM351.7 modules to flexibly expand total analog I/O channel capacity according to system design requirements. Vacant rack bus expansion slots without adapter bases are sealed with 7AC020.9 bus covers to preserve cabinet dustproof performance and rack structural stability. All configuration parameters including input signal range, scaling coefficients, output signal mapping, filter strength and fault thresholds are set and downloaded uniformly through B&R Automation Studio software connected to the System 2003 CPU; no manual hardware trimming or calibration adjustments are performed directly on the module.

The submodule contains one fully differential analog input channel and one independent analog output channel. The input channel supports selectable signal ranges of ±10 V DC voltage and 0–20 mA DC loop current, equipped with a precision analog-to-digital converter to ensure reliable measurement resolution for conventional industrial closed-loop feedback control. The output channel converts digital control values into ±10 V DC or 0–20 mA DC driving signals with stable load capacity compatible with mainstream industrial analog actuators. Comprehensive built-in protection circuits safeguard the module against damage caused by overvoltage, overcurrent, reverse polarity wiring and short-circuit faults resulting from field installation errors or damaged wiring harnesses. The outer housing is constructed from flame-retardant reinforced industrial plastic with an IP20 ingress protection rating, restricted exclusively to installation inside sealed indoor electrical control cabinets. The stable continuous operating ambient temperature range is 0 °C to +60 °C; storage and transportation temperature tolerance spans -25 °C to +70 °C for warehouse storage and cross-border logistics transit. Gold-plated rear insertion contact pins establish low-resistance, vibration-resistant electrical contact with 7AF104.7 adapter base slots, maintaining stable performance for years of round-the-clock factory operation under mechanical vibration from processing machinery. No independent local firmware storage is integrated on the module; all operational logic and configuration settings are remotely managed by the System 2003 host CPU via high-speed internal backplane bus communication. Matched terminal blocks accept standard cross-section copper signal cables for secure wiring without the need for on-site soldering work.

7AM351.7 module is exclusively compatible with the B&R System 2003 hardware ecosystem and cannot be mechanically or electrically interchanged with analog submodules from X20, X67, APC, ACOPOS or other newer B&R product platforms. It is designed solely for plug-in installation into the four standard slot openings of the 7AF104.7 high-speed analog adapter base as a dedicated mixed analog I/O submodule. It operates seamlessly with the full lineup of System 2003 supporting hardware: 7CP series PCC CPU controllers, other analog submodules including 7AI294.7 potentiometer input modules, 7AI351.70 universal analog input modules and 7AI774.70 RTD temperature input modules, digital I/O 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 required for standard assembly; tool-free plug-in installation greatly reduces field assembly labor time. Shielded twisted-pair cables are highly recommended for both input sensor wiring and output actuator wiring to further mitigate electromagnetic interference in high-noise workshop environments. Mandatory matching wiring accessories are 7TB712.9 screw terminal blocks or 7TB712.91 cage-clamp terminal blocks, which must be purchased separately to connect field devices to the module. When distributed multi-station CAN bus networking is required for long production line layouts, 7AC911.9 bus connectors are installed at communication module positions on the shared rack backplane.

This mixed analog I/O submodule is deployed only within automation control stations built on the B&R System 2003 PCC architecture. Primary discrete manufacturing equipment applications include compact plastic injection molding machines, small packaging and filling production lines, auxiliary textile processing equipment, bench-top CNC metal cutting machines, light-duty printing presses and miniature automated assembly machinery that require simultaneous analog measurement feedback and analog actuator adjustment. It also supports auxiliary process control loops for food and beverage thermal processing machinery, municipal water treatment pump regulation cabinets, light-load material conveyor speed control systems, and small hydraulic or pneumatic actuator closed-loop pressure and flow regulation systems. Installation is limited to IP20-rated indoor electrical cabinets inside factory workshops and sheltered semi-outdoor machinery housings. It is not suitable for direct deployment in environments with corrosive chemical vapors, sustained high humidity, flammable explosive hazardous atmospheres or fully exposed outdoor locations unless equipped with additional fully sealed upgraded protective cabinet enclosures.

Genuine original 7AM351.7 modules have unique serial numbers archived in B&R’s official production records to enable complete component traceability. Since the System 2003 platform has reached official end-of-life status, product supply mainly relies on authorized global industrial spare part distributors. Refurbished modules undergo rigorous multi-stage pre-delivery testing: insertion contact continuity inspection, analog input accuracy calibration, analog output signal stability verification, filter performance assessment, bidirectional bus communication stability testing with the 7AF104.7 adapter base, and LED fault indicator functional validation. Refurbished units are normally covered by supplier warranty periods ranging from 12 to 24 months. Standard on-site commissioning steps include inserting the module into a vacant 7AF104.7 slot, mounting the separate matched terminal block, wiring field sensors and analog actuators, and uploading configured parameters via Automation Studio software. Disassembly of internal circuit boards or unauthorized manual hardware calibration adjustments are strictly prohibited during installation and maintenance work. Long-term storage must be arranged in dry, temperature-stabilized warehouses 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.