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

7AM351.70 is a pluggable screw-in mixed analog input and output submodule engineered exclusively for the B&R System 2003 automation control platform. It is designed to be inserted into the four slots of the 7AF104.7 high-speed analog adapter base, performing dual tasks of collecting analog measurement signals from field sensors and transmitting analog control signals to on-site actuators. Data conversion and bidirectional communication with System 2003 PCC CPU units are realized via the platform’s proprietary internal backplane bus. Manufactured in Austria, the module complies with CE and UL/cULus global industrial safety standards. The entire System 2003 hardware series has been officially end-of-life by B&R. Available stock consists of original factory-sealed new modules and fully functionally tested refurbished units for legacy production line maintenance, mechanical equipment retrofits and emergency spare part replacement. Integrated EMI filtering circuits and multi-layer electrical protection structures guarantee steady signal conversion performance inside electrical cabinets disturbed by inverters, servo motors and contactors.

The official part identifier is 7AM351.70, categorized as mixed analog I/O screw-type submodule matched to the 7AF series four-slot adapter base architecture of System 2003. The module is delivered as a standalone unit without preassembled terminal blocks, signal cables or mounting fixtures. Separate 12-pin terminal blocks are mandatory wiring accessories, with two types available: screw-clamp 7TB712.9 and cage-clamp 7TB712.91 for different field wiring preferences. Permanent laser etching on the rear plastic housing prints the B&R brand logo, complete part number, hardware revision code, unique serial number and production batch code to enable full production traceability and genuine product verification. Operating power is fed through the paired 7AF104.7 adapter base from the System 2003 24 V DC backplane bus, featuring low continuous power consumption suitable for 24/7 non-stop workshop operation. The slim body precisely occupies one single slot position of the 7AF104.7 four-slot adapter base, supporting compact dense rack stacking layout. For cross-border customs clearance, it is classified under industrial PLC mixed analog signal input and output sub-components. Compact LED indicators on the front shell provide real-time visual prompts for module power supply, backplane communication connection status and channel fault alarms to simplify on-site troubleshooting work.

This module integrates analog signal acquisition and analog signal control output in one compact body, mainly serving small and medium-sized automation stations that need both process variable monitoring and analog actuator closed-loop regulation. The input channel receives standard industrial voltage and loop current signals output by pressure transmitters, flow sensors, displacement transducers and temperature transmitters, converting continuous analog physical quantities into high-resolution digital data readable by System 2003 control logic. The 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. Built-in high-frequency filter circuits suppress cabinet electromagnetic noise, effectively preventing unstable input sampling values and distorted output control signals. All bidirectional digital data is synchronously uploaded and downloaded with the host CPU to achieve 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 a single System 2003 backplane, and each base can be equipped with up to four 7AM351.70 modules to flexibly expand the total number of analog input and output channels according to system design schemes. Vacant rack bus expansion slots without adapter bases are sealed by 7AC020.9 bus covers to maintain cabinet dustproof performance and rack mechanical stability. All configuration parameters including input signal range selection, input scaling coefficients, output signal mapping parameters, filter strength and fault threshold limits are configured and downloaded uniformly through B&R Automation Studio software connected to the System 2003 CPU; no manual hardware trimming or calibration adjustments are required directly on the module.

The 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 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 continuous stable operating ambient temperature range is 0 °C to +60 °C; storage and transportation temperature tolerance extends 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.

7AM351.70 module is strictly bound to the B&R System 2003 hardware ecosystem and cannot be mechanically or electrically interchanged with analog submodules of X20, X67, APC, ACOPOS or other newer B&R product platforms. It is exclusively designed 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 seamlessly cooperates with the full range 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, power transformers or external signal isolators are needed for standard assembly; tool-free plug-in installation greatly reduces field assembly labor time. 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 realize reliable connection between field devices and the module. When distributed multi-station CAN bus networking is required for long production line layouts, 7AC911.9 CAN bus connectors are installed at communication module positions on the shared rack backplane.

This mixed analog I/O submodule is only deployed in automation control stations built on the B&R System 2003 PCC control architecture. The main discrete manufacturing equipment application scenarios 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 require 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 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 matched with additional fully sealed upgraded protective cabinet housings.

Genuine original 7AM351.70 modules have unique serial numbers recorded in B&R’s official production archives to achieve 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 modules undergo comprehensive multi-stage pre-delivery testing: insertion contact continuity inspection, input channel accuracy calibration, output signal stability verification, filter performance assessment, bidirectional bus communication stability test with the 7AF104.7 adapter base, and LED fault indicator functional verification. Refurbished units are normally covered by supplier warranty terms ranging from 12 to 24 months. Standard on-site commissioning steps include inserting the module into an empty 7AF104.7 slot, installing 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 be placed 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 avoid mismatches with incompatible newer generations of B&R control hardware architectures.