Product Description for B&R 7AM351.70 Analog Mixed Module with Analog Output Function

7AM351.70 is a screw-in mixed analog submodule belonging to B&R System 2003 control platform, equipped with one analog output channel alongside one analog input channel. It is plugged into the slots of 7AF104.7 high-speed adapter base, receiving digital control instructions from System 2003 host CPU and converting them into standard analog drive signals for field actuators, meanwhile collecting analog measurement signals from process sensors. Produced in Austria, the module passes CE and UL/cULus industrial safety certifications for global factory deployment. The System 2003 hardware platform has been officially discontinued by B&R headquarters. Available inventory includes original factory-sealed new units and fully tested refurbished modules for legacy production line maintenance, equipment retrofits and emergency spare part replacement projects. Built-in EMI filter circuits and multi-layer protection ensure stable analog output drive performance in electrical cabinets with interference from inverters, servo drives and contactors.

The official part number is 7AM351.70, categorized as mixed analog input and output screw-type submodule under the 7AF series adapter base system of System 2003, featuring a functional analog output channel as its control execution core. The module is delivered as an independent unit without pre-installed terminal blocks, signal cables or mounting fittings. Separate 12-pin terminal blocks are mandatory wiring accessories, including screw-clamp type 7TB712.9 and cage-clamp type 7TB712.91 for flexible field wiring. Permanent laser engraving on the rear plastic housing marks B&R brand logo, complete part number, hardware revision code, unique serial number and production batch code to realize full production traceability and authenticity verification. Operating power is supplied by the System 2003 24 V DC backplane bus through the connected 7AF104.7 adapter base, with low steady power consumption suitable for 24/7 uninterrupted industrial operation. Its slim outline precisely occupies one single slot of the four-slot 7AF104.7 adapter base, supporting compact dense rack stacking layout. For international customs clearance, it is classified under industrial PLC analog signal input and output sub-components tariff category. Small LED indicators on the front panel display module power supply status, backplane communication link state and channel fault alarms to facilitate rapid on-site troubleshooting.

The analog output function serves as the core control output of this mixed module. It converts digital setpoint values transmitted by the System 2003 CPU into standardized analog voltage or current signals to drive proportional valves, heating regulators, variable-speed auxiliary actuators and other analog execution devices on automated machinery. Paired with its integrated analog input channel, it forms a compact closed-loop control unit for small-scale process loops, where the input collects feedback measurement values and the output adjusts actuator operation to stabilize temperature, pressure, flow or displacement. Internal filter circuits suppress high-frequency cabinet electromagnetic noise to prevent jitter and distortion of analog output signals, avoiding unstable actuator movement or inaccurate process regulation. All bidirectional data between the module and host CPU is synchronized via the proprietary backplane bus, supporting closed-loop regulation logic, fault interlock protection, real-time parameter display on 7AI261 series touch HMIs and historical operation data logging. Multiple 7AF104.7 adapter bases can be mounted on one System 2003 backplane, with each base holding up to four 7AM351.70 modules to expand total analog output and input channel capacity according to system design requirements. Vacant rack bus expansion slots without adapter bases are sealed by 7AC020.9 bus covers to maintain cabinet dustproof performance and rack structural rigidity. All analog output configuration parameters including signal range, output scaling, response filtering and short-circuit fault thresholds are set and downloaded uniformly via 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.

The analog output channel delivers selectable standard industrial signal ranges of ±10 V DC voltage and 0–20 mA DC loop current, with stable load driving capacity compatible with mainstream industrial analog actuators. The output circuit adopts high-stability conversion circuitry to ensure low signal drift and precise proportional adjustment matching digital CPU setpoints. The matched analog input channel supports ±10 V and 0–20 mA signal acquisition with high-precision ADC for feedback measurement. Comprehensive built-in protection circuits shield the analog output channel against short-circuit, overload, overvoltage and reverse wiring faults to prevent permanent circuit damage during field installation errors or actuator malfunctions. The outer housing is constructed from flame-retardant reinforced industrial plastic with IP20 ingress protection rating, restricted exclusively to installation inside sealed 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 logistics transit. Gold-plated rear insertion contact pins create low-resistance, vibration-resistant electrical contact with 7AF104.7 adapter base slots, reliable for long-term round-the-clock factory operation under mechanical vibration from processing equipment. No independent local firmware storage exists on the module; all analog output operating logic and configuration settings are remotely managed by the System 2003 host CPU through high-speed internal backplane bus communication. Matched terminal blocks accept standard cross-section copper signal cables for secure wiring without requiring on-site soldering work.

7AM351.70 analog mixed module with analog output function is exclusively compatible with B&R System 2003 hardware ecosystem and cannot be mechanically or electrically interchanged with analog submodules of X20, X67, APC, ACOPOS and other newer B&R product platforms. It can only be inserted into the four standard slot openings of the 7AF104.7 high-speed analog adapter base as a dedicated mixed analog I/O submodule with output capability. It integrates seamlessly with the full lineup of System 2003 supporting hardware: 7CP series PCC CPU controllers, other analog submodules such as 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 on-site assembly labor hours. Shielded twisted-pair cables are highly recommended for both analog output actuator wiring and analog input sensor wiring to further weaken 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 actuators and sensors 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 same rack backplane.

This submodule with analog output control is deployed solely within automation control stations built on B&R System 2003 PCC architecture. Primary discrete manufacturing machinery applications include compact plastic injection molding machines for heating loop regulation, small packaging and filling production lines for flow valve adjustment, auxiliary textile drying oven temperature control, bench-top CNC machine tool coolant pressure regulation, light-duty printing press heating roller control and miniature automated assembly equipment actuator adjustment systems. It also serves auxiliary process control loops for food and beverage thermal processing machinery, municipal water treatment pump flow regulation cabinets, light-load material conveyor speed control systems, and small hydraulic and pneumatic actuator closed-loop pressure 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 7AM351.70 modules carry unique serial numbers archived in B&R official production records to achieve 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 strict multi-stage pre-delivery testing focused heavily on analog output performance: insertion contact continuity inspection, analog output signal stability calibration, load driving capacity verification, input channel accuracy testing, filter performance assessment, bus communication stability trials with the 7AF104.7 adapter base, and LED fault indicator function 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 matched terminal blocks, wiring analog actuators and feedback sensors, and uploading configuration parameters via Automation Studio software. Disassembly of internal circuit boards or unauthorized manual hardware calibration adjustments for the analog output circuit 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.