Product Description for B&R 7AM351.70 Mixed Analog Module (System 2003 Series)

7AM351.70 is a screw-in mixed analog signal submodule belonging to the B&R System 2003 automation control platform, integrating analog input and analog output circuits within one compact unit. It is designed for plug-in installation into the slots of the 7AF104.7 high-speed adapter base, realizing simultaneous collection of field analog measurement signals and output of analog control signals to actuators. All converted digital data and control instructions are transmitted to and from System 2003 host CPUs through the platform’s proprietary internal backplane bus. Manufactured in Austria, the module holds CE and UL/cULus industrial safety certifications to support global factory deployment. The entire System 2003 hardware product line has been officially marked end-of-life by B&R headquarters. Available market inventory consists of original factory-sealed new modules and fully validated refurbished units, dedicated to legacy production line maintenance, mechanical equipment retrofits and emergency spare part replacement projects. Built-in EMI filtering and multi-level circuit protection deliver stable signal conversion performance in electrical cabinets filled with interference from inverters, servo drives and contactors.

The official full part number is 7AM351.70, classified as mixed analog input and output screw-type submodule matched to the 7AF series four-slot adapter base framework of System 2003. The module is supplied as an independent bare body without pre-assembled terminal blocks, signal cables or auxiliary mounting hardware. Separate 12-pin terminal blocks are mandatory wiring accessories, available in screw-clamp style 7TB712.9 and cage-clamp style 7TB712.91 for different field wiring preferences. Permanent laser etching on the rear plastic housing displays the B&R brand logo, complete part number, hardware revision identifier, unique serial number and production batch code to enable full production traceability and genuine product verification. Operating power is delivered through the connected 7AF104.7 adapter base from the System 2003 24 V DC backplane bus, featuring low continuous power consumption suitable for 24/7 non-stop industrial workshop operation. Its slim form factor occupies exactly one single slot position of the four-slot 7AF104.7 adapter base, enabling space-saving dense rack stacking layouts. For cross-border logistics and customs clearance, it falls under the tariff classification of industrial PLC mixed analog signal acquisition and output sub-components. Compact LED indicators on the front panel provide real-time visual feedback of module power supply status, backplane communication link health and channel fault alarm signals to streamline on-site troubleshooting procedures.

The core positioning of the 7AM351.70 mixed analog module is integrated analog signal handling for compact automation stations that require both process variable measurement and analog actuator regulation. On the input side, it receives standard industrial voltage and loop current analog signals from pressure transmitters, flow meters, temperature transducers and displacement sensors, converting continuous analog physical values into high-resolution digital data readable by System 2003 control logic. On the output side, it converts digital control values sent by the host CPU into standardized analog voltage or current signals to drive proportional valves, variable-speed auxiliary actuators, heating power regulators and other analog execution devices. Internal high-frequency filter circuits suppress electromagnetic cabinet noise to prevent unstable input readings and distorted output control signals. All bidirectional digital data is synchronously exchanged with the host CPU to support closed-loop process regulation, threshold 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 mounted on a single System 2003 backplane, with each base accommodating up to four 7AM351.70 mixed analog modules to flexibly scale total analog input and output channel capacity according to system design layouts. Vacant rack bus expansion slots without fitted adapter bases are sealed using 7AC020.9 bus covers to sustain cabinet dust resistance and reinforce overall rack structural rigidity. All operational parameters including input signal range selection, input scaling coefficients, output signal range mapping, filter intensity and fault threshold limits are configured and downloaded centrally via B&R Automation Studio software connected to the System 2003 CPU; no manual hardware trimming or calibration adjustments are required directly on the module body itself.

This mixed analog submodule integrates one 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 for accurate measurement resolution for general industrial closed-loop control. The output channel converts digital setpoints into ±10 V DC voltage or 0–20 mA DC current analog driving signals with stable output load capacity for standard industrial analog actuators. Comprehensive built-in protective circuits defend against overvoltage, overcurrent, reverse polarity wiring and short-circuit faults caused by field installation misoperations or damaged wiring harnesses, avoiding permanent module circuit damage. The outer enclosure 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 continuous stable operating ambient temperature window spans 0 °C to +60 °C; storage and transportation temperature tolerance extends broadly from -25 °C up to +70 °C for warehouse storage and international cross-border shipping cycles. Gold-plated rear insertion contact pins establish low-resistance, vibration-resistant electrical contact with the slots of the 7AF104.7 adapter base, proven reliable for multi-year round-the-clock factory operation under mechanical vibration from processing machinery. No independent local firmware storage is integrated onto the module; all running 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, repeatable wiring without requiring on-site soldering work.

7AM351.70 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 input/output analog 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 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/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 7AM351.70 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, input channel accuracy calibration, 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.