Product Description for B&R 7AM351.70 Mixed Analog I/O Submodule

7AM351.70 is a screw-in mixed analog input and output submodule designed exclusively for the B&R System 2003 automation control platform. It inserts into the slots of the 7AF104.7 high-speed adapter base, handling both acquisition of analog measurement signals and transmission of analog control signals to field actuators. Bidirectional signal data is converted and exchanged with System 2003 host CPUs via the proprietary internal backplane bus. Manufactured in Austria, the module complies with CE and UL/cULus industrial safety standards for global factory deployment. The System 2003 hardware lineup is officially end-of-life from B&R; available stock includes original factory-sealed new units and fully tested refurbished modules for legacy production line maintenance, equipment retrofits and emergency spare part replacements. Integrated EMI filters and multi-layer circuit protection ensure stable signal conversion in electrical cabinets disturbed by inverters, servo drives and contactors.

The official part number is 7AM351.70, categorized as mixed analog input/output screw-type submodule for the 7AF four-slot adapter base system of System 2003. The module is delivered as a standalone unit without pre-assembled terminal blocks, signal cables or mounting fittings. Separate 12-pin terminal blocks are required for field wiring, with two options: screw-clamp 7TB712.9 and cage-clamp 7TB712.91. Permanent laser engraving on the rear plastic housing marks the B&R logo, complete part number, hardware revision code, unique serial number and production batch code to enable full traceability and authenticity checks. Power is supplied through the paired 7AF104.7 adapter base from the System 2003 24 V DC backplane bus, with low steady power consumption suited for 24/7 continuous workshop operation. The slim form factor occupies exactly one slot of the four-slot 7AF104.7 adapter base, supporting compact dense rack stacking. For international customs clearance, it is classified under industrial PLC mixed analog signal I/O sub-components. Small front-panel LED indicators deliver real-time visual status for module power, backplane communication and channel fault alerts to simplify on-site troubleshooting.

This mixed module combines analog input sensing and analog output control in a single compact submodule, optimized for small-scale automation stations that need both process monitoring and analog actuator regulation. The input channel captures standard industrial voltage and current signals from pressure transmitters, flow sensors, displacement transducers and temperature transmitters, converting continuous analog physical values into digital data readable by the PLC control program. The output channel converts digital control setpoints sent by the host CPU into standardized analog voltage or current signals to drive proportional valves, heating regulators, speed control actuators and other analog execution components. Built-in high-frequency filter circuitry suppresses cabinet electromagnetic noise to prevent fluctuating input readings and distorted output control signals. Synchronized bidirectional data transfer with the host CPU enables closed-loop process regulation, fault interlock protection, real-time value display on 7AI261 series touch HMIs and historical operational data logging. Multiple 7AF104.7 adapter bases can be mounted on one System 2003 backplane; each base holds up to four 7AM351.70 mixed modules to flexibly expand total analog I/O channel capacity. Unoccupied rack bus expansion slots without adapter bases are sealed with 7AC020.9 bus covers to preserve dust protection and rack structural rigidity. All configuration parameters including signal range selection, scaling factors, filter strength and fault thresholds are set and downloaded via 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 features one fully differential analog input channel and one isolated analog output channel. The input supports selectable signal ranges of ±10 V DC voltage and 0–20 mA DC loop current, fitted with a high-precision ADC to deliver reliable measurement resolution for standard industrial closed-loop control. The output channel generates ±10 V DC or 0–20 mA DC driving signals with stable load capacity compatible with mainstream industrial analog actuators. Comprehensive protective circuits shield the hardware against overvoltage, overcurrent, reverse polarity wiring and short-circuit faults caused by field installation errors or damaged wiring. The housing uses flame-retardant reinforced industrial plastic with an IP20 ingress protection rating, restricted solely to installation inside enclosed indoor electrical control cabinets. Continuous stable operating ambient temperature ranges from 0 °C to +60 °C; storage and transportation temperature tolerance spans -25 °C up to +70 °C for warehouse storage and cross-border shipping. Gold-plated rear insertion contact pins provide low-resistance, vibration-proof electrical contact with 7AF104.7 base slots, stable for years of non-stop factory operation under mechanical vibration from processing equipment. No local onboard firmware storage exists; all operational logic and configuration settings are remotely managed by the System 2003 host CPU over the high-speed internal backplane bus. Matched terminal blocks accept standard cross-section copper cables for secure wiring without on-site soldering work.

7AM351.70 mixed module is exclusively locked into 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 only for plug-in installation into the four standard slot openings of the 7AF104.7 high-speed analog adapter base as a dedicated mixed I/O submodule. It integrates seamlessly with the full range of System 2003 supporting hardware: 7CP series PCC CPU controllers, other analog submodules including 7AI294.7 potentiometer inputs, 7AI351.70 universal analog inputs and 7AI774.70 RTD temperature inputs, 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 fitting greatly reduces field installation labor time. Shielded twisted-pair cables are highly recommended for both input sensor wiring and output actuator wiring to minimize electromagnetic interference in high-noise workshop environments. Mandatory wiring accessories are the 7TB712.9 screw terminal blocks or 7TB712.91 cage-clamp terminal blocks, which must be purchased separately to connect field devices to the mixed module. For distributed multi-station CAN bus networking across long production lines, 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 applications include compact plastic injection molding machines, small packaging and filling production lines, auxiliary textile processing equipment, bench CNC metal cutting machines, light-duty printing presses and miniature automated assembly machinery requiring simultaneous analog measurement and analog actuator adjustment. It also supports auxiliary process control loops for food and beverage thermal processing equipment, 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 in factory workshops and sheltered semi-outdoor machinery housings. It is not suitable for direct deployment in environments with corrosive chemical vapors, persistent high humidity, flammable explosive hazardous atmospheres or fully exposed outdoor locations unless fitted with fully sealed upgraded protective cabinet enclosures.

Genuine original 7AM351.70 modules carry unique serial numbers archived in B&R’s official production records for complete component traceability. Since the System 2003 platform has reached official end-of-life status, product supply relies on authorized global industrial spare part distributors. Refurbished mixed modules undergo rigorous multi-stage pre-delivery testing: insertion contact continuity inspection, input channel accuracy calibration, output signal stability verification, filter performance testing, bidirectional bus communication validation with the 7AF104.7 base, and LED fault indicator function checks. Refurbished units typically come with supplier warranty coverage ranging from 12 to 24 months. Standard 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 configuration parameters via Automation Studio software. Disassembly of internal circuit boards or unauthorized manual hardware calibration adjustments are strictly prohibited during installation and maintenance. Long-term storage must be maintained in dry, temperature-stabilized warehouses to prevent plastic casing embrittlement and oxidation of metal contact pins and terminal screws. During 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.