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

7AM351.7 is a screw-in mixed analog input and output submodule exclusively developed for the B&R System 2003 automation control platform. It is inserted into the slots of the 7AF104.7 high-speed analog adapter base, realizing dual functions of field analog signal collection and analog control signal output to actuators. Bidirectional data conversion and communication with System 2003 PCC CPU controllers are completed through the platform’s proprietary internal backplane bus. Manufactured in Austria, the module complies with CE and UL/cULus global industrial safety standards for factory deployment worldwide. The whole System 2003 hardware series has been officially marked end-of-life by B&R. Available market supplies include original factory-sealed new imported modules and fully function-tested refurbished units, which are used for legacy production line maintenance, mechanical equipment renovation and emergency spare part replacement projects. Built-in EMI filtering circuits and multi-layer electrical protection structures ensure stable signal conversion performance in electrical cabinets with strong interference from inverters, servo drives and contactors.

The official part number is 7AM351.7, classified as mixed analog I/O screw-type submodule matching the four-slot 7AF104.7 adapter base framework of System 2003. The module is delivered as an independent bare unit without pre-installed terminal blocks, signal cables or auxiliary mounting fittings. Separate 12-pin terminal blocks are essential wiring accessories, with two options: screw-clamp type 7TB712.9 and cage-clamp type 7TB712.91 for different field wiring habits. Permanent laser engraving on the rear plastic housing displays B&R brand logo, complete part number, hardware revision code, unique serial number and production batch code to achieve full production traceability and genuine product authentication. Operating power is supplied by the System 2003 24 V DC backplane bus via the matched 7AF104.7 adapter base, with low power consumption suitable for 24-hour uninterrupted industrial operation. Its slim outline precisely occupies one single slot position of the four-slot 7AF104.7 adapter base, supporting compact and dense rack stacking layout. For international customs clearance, it is categorized under industrial PLC mixed analog signal input and output sub-components tariff item. Compact LED indicators on the front panel intuitively display module power supply status, backplane communication connection state and channel fault alarm signals to simplify on-site troubleshooting work.

The core positioning of this mixed analog module is integrated analog signal processing for small and medium-sized automation stations that require both process variable monitoring and analog actuator closed-loop regulation. The analog input channel receives standard industrial voltage and loop current signals transmitted by pressure transmitters, flow meters, displacement transducers and temperature transmitters, converting continuous analog physical quantities into high-resolution digital data recognizable by System 2003 control programs. The analog output channel converts digital control setpoints issued by the host CPU into standardized voltage or current analog signals to drive proportional hydraulic valves, heating power regulators, auxiliary speed adjustment actuators and other analog execution components. Internal high-frequency filter circuits suppress electromagnetic noise inside cabinets, effectively preventing unstable input sampling values and distorted output control signals. All bidirectional digital data is synchronously transmitted to and from the host CPU to realize closed-loop process adjustment, over-limit fault interlock protection, real-time value display on compatible 7AI261 series color touch HMIs and long-term production operation data logging. Multiple 7AF104.7 adapter bases can be installed on one System 2003 backplane, and each base can carry up to four 7AM351.7 mixed analog modules to flexibly expand total analog input and output channel quantity according to system design schemes. Vacant rack bus expansion slots without adapter bases are sealed with 7AC020.9 bus covers to guarantee cabinet dustproof performance and rack mechanical stability. All configuration parameters including input signal range selection, input scaling coefficients, output signal mapping parameters, filter intensity and fault threshold limits 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 needed directly on the module body.

This mixed analog submodule is equipped with 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 high-precision analog-to-digital converter to provide reliable measurement resolution for conventional industrial closed-loop feedback control. The output channel converts digital set 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 protect the module from damage caused by overvoltage, overcurrent, reverse polarity wiring and short-circuit faults triggered by field installation misoperations or damaged wiring harnesses. The outer housing is made of flame-retardant reinforced industrial plastic with an IP20 ingress protection rating, and it is only allowed to be installed inside sealed indoor electrical control cabinets. The stable continuous operating ambient temperature range is 0 °C to +60 °C; storage and transportation temperature tolerance ranges from -25 °C up to +70 °C for warehouse storage and international cross-border shipping cycles. Gold-plated rear insertion contact pins form low-resistance, vibration-resistant electrical contact with the slots of the 7AF104.7 adapter base, remaining stable for years of round-the-clock factory operation under mechanical vibration generated by processing equipment. There is no independent local firmware storage on the module; all operation logic and configuration parameters 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 firm and repeatable wiring without requiring on-site soldering work.

7AM351.7 mixed analog module is strictly bound to 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 purpose-built 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 integrates seamlessly with the full portfolio 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 input/output modules, 7AC911.9 CAN bus communication connectors, 7AC020.9 blank bus slot covers and 7AI261 series color touch HMI panels. No extra mounting brackets, external power transformers or standalone signal isolators are necessary for standard assembly; tool-free plug-in fitting drastically reduces field installation labor time. Shielded twisted-pair cables are highly recommended for both input sensor wiring and output actuator wiring to further suppress electromagnetic noise in heavy-interference workshop environments. Mandatory matching wiring accessories consist of 12-pin screw-clamp or cage-clamp terminal blocks, which must be sourced separately to facilitate reliable connection between field devices and the mixed analog module. For distributed multi-station networking across lengthy production line layouts, 7AC911.9 CAN bus connectors are fitted to communication module positions on the shared rack backplane.

This mixed analog input and output submodule is deployed solely within automation control stations built around the B&R System 2003 PCC control architecture. Primary discrete manufacturing machinery applications include compact plastic injection molding machines, small-scale packaging and filling production units, auxiliary textile processing equipment, bench-top CNC metal cutting machines, light-duty printing presses and miniature automated assembly devices that require simultaneous analog feedback measurement and analog actuator adjustment. It also serves 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 enclosures. It is not approved for direct use in environments containing corrosive chemical vapors, persistent high humidity, flammable explosive hazardous atmospheres or fully exposed outdoor locations unless paired with additional fully sealed upgraded protective cabinet housings.

Genuine original 7AM351.7 modules feature unique serial numbers logged within B&R’s official production archives to enable complete component traceability. As the System 2003 platform has reached official end-of-life status, product supply channels are limited to authorized global industrial spare part distributors. Refurbished mixed analog submodules undergo comprehensive multi-stage pre-delivery testing: insertion contact continuity validation, analog input channel accuracy calibration, analog output signal stability verification, filter performance assessment, bidirectional bus communication stability trials with the 7AF104.7 adapter base, and LED fault indicator functional verification. Refurbished units are typically covered by supplier warranty terms ranging from 12 to 24 months. Standard on-site commissioning workflow includes inserting the module into an empty 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 routine maintenance work. Long-term storage must take place in dry, temperature-stabilized warehouse conditions to prevent plastic casing embrittlement and oxidation of metal contact pins and terminal fasteners. During equipment maintenance replacement, field service technicians must fully confirm compatibility with the System 2003 platform and 7AF104.7 adapter base to prevent mismatches with incompatible newer generations of B&R control hardware architectures.