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

7AM351.70 is a screw-in mixed analog input and output submodule developed exclusively for the B&R System 2003 automation control platform. It inserts into the slots of the 7AF104.7 high-speed analog adapter base, realizing real-time acquisition of field analog measurement signals and output of analog control signals to on-site actuators. Signal conversion and bidirectional data exchange with System 2003 host CPUs are completed through 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 been officially discontinued by B&R. Available stock covers original factory-sealed new modules and fully tested refurbished units, serving maintenance, equipment renovation and emergency spare part replacement of legacy production lines. Built-in EMI filter circuits and multi-level electrical protection deliver stable signal conversion performance in electrical cabinets with heavy interference from inverters, servo drives and contactors.

The official part number is 7AM351.70, classified as mixed analog input and output screw-type submodule matching the 7AF series four-slot adapter base framework of System 2003. The module is delivered as an independent body without pre-installed terminal blocks, signal cables or mounting accessories. Separate 12-pin terminal blocks are essential wiring fittings, including screw-clamp type 7TB712.9 and cage-clamp type 7TB712.91 to meet different field wiring demands. Permanent laser marking on the rear plastic housing displays B&R brand logo, complete part number, hardware revision code, unique serial number and production batch code to ensure full production traceability and authenticity verification. Power is supplied by the 24 V DC backplane bus of System 2003 via the matched 7AF104.7 adapter base, with low power consumption supporting 24-hour uninterrupted industrial operation. Its slim structure occupies exactly one slot position of the four-slot 7AF104.7 adapter base, enabling compact and dense rack layout arrangement. For international customs clearance, it is categorized under industrial PLC mixed analog signal input and output sub-components. Compact LED indicators on the front panel intuitively show module power supply status, backplane communication connection and channel fault alarm signals to simplify on-site troubleshooting.

The core positioning of this analog mixed module is integrated analog signal processing for compact automation stations that require both process variable monitoring and analog actuator closed-loop regulation. The analog input channel receives standard industrial voltage and current signals from pressure transmitters, flow meters, displacement sensors and temperature transmitters, converting continuous analog physical signals into high-resolution digital data identifiable by System 2003 control programs. The analog output channel converts digital control instructions sent by the host CPU into standardized voltage or current analog signals to drive proportional valves, heating regulators, auxiliary speed regulators and other analog execution devices. Internal high-frequency filter circuits suppress electromagnetic interference inside cabinets, effectively avoiding unstable input sampling values and distorted output control signals. All bidirectional digital data is synchronously transmitted to the host CPU to realize closed-loop process adjustment, over-limit fault interlock protection, real-time value display on matched 7AI261 series touch HMIs and long-term production operation data recording. Multiple 7AF104.7 adapter bases can be installed on one System 2003 backplane, and each base can carry up to four 7AM351.70 analog mixed modules to flexibly expand total analog input and output channel quantity according to system design requirements. Vacant rack bus expansion slots without adapter bases are sealed with 7AC020.9 bus covers to guarantee cabinet dustproof performance and rack structural stability. All configuration parameters including input signal range selection, input scaling coefficients, output signal mapping, filter intensity and fault threshold limits 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.

This analog mixed module 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 high-precision analog-to-digital converter to provide reliable measurement resolution for conventional industrial closed-loop control. The output channel converts digital setpoints 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 prevent module damage caused by overvoltage, overcurrent, reverse polarity wiring and short-circuit faults arising from field installation errors or damaged cables. The outer casing adopts flame-retardant reinforced industrial plastic with IP20 protection grade, limited to installation inside sealed indoor electrical control cabinets only. The stable continuous operating ambient temperature range is 0 °C to +60 °C; storage and transportation temperature tolerance ranges from -25 °C to +70 °C for warehouse storage and cross-border logistics transit. Gold-plated rear insertion contact pins form low-resistance, vibration-resistant electrical contact with 7AF104.7 adapter base slots, adapting to long-term round-the-clock factory operation under mechanical vibration from processing equipment. There is no independent local firmware storage on the module; all operation logic and parameter configurations are remotely managed by the System 2003 host CPU through high-speed internal backplane bus communication. Matched terminal blocks support standard cross-section copper signal cables for firm wiring without on-site soldering operations.

7AM351.70 analog mixed module 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 plugged into the four standard slot openings of the 7AF104.7 high-speed analog adapter base as a dedicated mixed analog input/output submodule. It works seamlessly with full-series 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 input sensor wiring and output actuator 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 devices to the analog mixed 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 analog mixed input/output submodule is only deployed in automation control stations built on B&R System 2003 PCC architecture. Major 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 need simultaneous analog measurement 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 and 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 7AM351.70 analog mixed modules have unique serial numbers archived in B&R official production records to realize complete component traceability. Since System 2003 platform has reached official end-of-life status, product supply mainly relies on authorized global industrial spare part distributors. Refurbished analog mixed modules undergo strict multi-stage pre-delivery testing, including insertion contact continuity inspection, input channel accuracy calibration, output signal stability verification, filter performance testing, bidirectional bus communication validation with 7AF104.7 adapter base, and LED fault indicator function checks. 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 an empty 7AF104.7 slot, installing matched terminal blocks, 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 avoid plastic casing embrittlement and oxidation of metal contact pins and terminal screws. During equipment maintenance replacement, field 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.