Product Description for B&R 7AM351.7 Mixed Analog Module with Analog Input Channel

7AM351.7 is an Austrian-made screw-in submodule for the B&R System 2003 automation platform, equipped with one analog input channel together with one analog output channel. It inserts into slots of the 7AF104.7 high-speed adapter base. The analog input channel collects physical process signals from field transmitters and converts analog values into digital data for System 2003 host CPUs via the proprietary internal rack bus. The integrated analog output channel delivers control signals to on-site actuators for closed-loop regulation. Certified to CE and UL/cULus industrial safety standards, this imported unit is widely used on legacy automated production equipment. The System 2003 series is officially end-of-life by B&R; available stock covers original factory-new modules and fully inspected refurbished units for equipment maintenance, retrofits and emergency spare replacements. Built-in EMI filters and multi-layer circuit protection guarantee stable analog input sampling in cabinets disturbed by inverters, servo motors and contactors.

Official part number: 7AM351.7, classified as mixed analog I/O screw submodule for the 4-slot 7AF104.7 adapter base under System 2003 architecture. The analog input channel acts as its core signal acquisition unit. The module ships as a standalone body without pre-assembled terminal blocks, cables or mounting hardware. Separate 12-pin terminals are required for wiring: screw-clamp type 7TB712.9 and cage-clamp type 7TB712.91. Laser marking on the rear plastic housing shows B&R logo, full part code, hardware revision, unique serial number and production batch for full traceability and authenticity checks. Power is fed from the System 2003 24 V DC backplane bus through the 7AF104.7 base, with low power draw suitable for 24/7 continuous factory operation. Its slim profile occupies exactly one slot of the four-slot 7AF104.7 adapter base to enable compact dense rack stacking. For customs declaration, it falls under industrial PLC mixed analog signal acquisition and output sub-components. Small front LEDs display power status, bus communication link and analog input fault alerts for quick field troubleshooting.

The analog input channel is responsible for capturing standard industrial analog feedback signals from pressure, flow, displacement and temperature transmitters. It converts continuous analog resistance, voltage or current signals into high-resolution digital values readable by System 2003 control logic. Paired with the onboard analog output channel, it forms a compact closed-loop control unit: input reads real-time process feedback, output adjusts actuator operation to stabilize temperature, pressure, flow or position. Internal high-frequency filter circuits suppress electromagnetic interference to eliminate drifting or fluctuating analog input readings during thermal and pressure regulation cycles. All digital data is synchronously exchanged with the host CPU to support closed-loop control logic, over-limit fault interlocks, real-time value display on 7AI261 series touch HMIs and historical process data logging. Multiple 7AF104.7 adapter bases can be mounted on one System 2003 backplane; each base supports up to four 7AM351.7 modules to expand total analog input and output channel count per system design. Empty rack bus slots without adapter bases are sealed by 7AC020.9 bus covers to retain dust protection and rack structural rigidity. All analog input configuration parameters including signal range, scaling factors and filter strength are set and downloaded via B&R Automation Studio software; no physical trimming or calibration adjustments are performed directly on the module hardware.

The analog input channel uses fully differential circuit design with selectable signal ranges: ±10 V DC voltage and 0–20 mA DC loop current. A precision analog-to-digital converter delivers consistent measurement accuracy for general industrial closed-loop feedback control. The accompanying analog output channel converts digital CPU setpoints into ±10 V or 0–20 mA drive signals with stable load capacity for proportional valves, heating regulators and speed actuators. Comprehensive protection circuits shield the analog input channel from overvoltage, overcurrent, reverse polarity and short-circuit damage caused by wiring errors or damaged sensor cables. The housing is flame-retardant reinforced industrial plastic rated IP20, permitted only inside sealed indoor electrical control cabinets. Continuous stable operating temperature range: 0 °C to +60 °C; storage and transport temperature range: −25 °C to +70 °C. Gold-plated rear insertion pins create low-resistance, vibration-proof contact with the 7AF104.7 base slots, reliable for years of round-the-clock operation under machine vibration. No local onboard firmware exists; all analog input operation logic and settings are remotely managed by the System 2003 CPU over the high-speed internal backplane bus. Matching terminal blocks accept standard copper cable cross-sections for secure solder-free field wiring.

7AM351.7 cannot be mechanically or electrically swapped with analog submodules from X20, X67, APC or ACOPOS newer B&R platforms; it only fits the four standard slots of the 7AF104.7 high-speed analog adapter base as a dedicated mixed analog I/O submodule with analog input capability. Fully compatible System 2003 hardware includes 7CP series PCC CPU controllers, other analog submodules (7AI294.7 potentiometer input, 7AI351.70 universal analog input, 7AI774.70 RTD temperature input), digital I/O modules, 7AC911.9 CAN bus connectors, 7AC020.9 blank bus covers and 7AI261 series color touch HMIs. No extra brackets, isolation transformers or external signal conditioners are needed for standard assembly; tool-free plug-in installation cuts field assembly time significantly. Shielded twisted-pair cables are strongly recommended for analog input sensor wiring to reduce EMI in noisy workshop environments. Mandatory separate wiring parts are 7TB712.9 screw terminals or 7TB712.91 cage-clamp terminals to connect field sensors and actuators to the module. For long production line distributed networking, 7AC911.9 CAN bus connectors are fitted to communication module positions on the shared rack backplane.

This analog input equipped mixed submodule is exclusively used in automation stations built on the B&R System 2003 PCC platform. Typical discrete manufacturing machinery includes compact plastic injection molding machines, small packaging and filling lines, auxiliary textile drying equipment, bench CNC metal cutting machines, light printing presses and miniature automated assembly machines requiring analog feedback measurement plus analog actuator adjustment. It also supports auxiliary control loops for food thermal processing machines, municipal water treatment pump control cabinets, light-load conveyor speed control systems, and small hydraulic/pneumatic actuator pressure and flow closed-loop regulation systems. Installation is restricted to IP20 indoor factory cabinets and sheltered semi-outdoor machine housings. It is not approved for use in corrosive vapor atmospheres, high-humidity spaces, explosive hazardous zones or fully exposed outdoor locations unless fitted with fully sealed upgraded protective enclosures.

Genuine original 7AM351.7 units carry unique serial numbers archived in B&R Austrian production databases for full supply chain traceability. Since System 2003 is end-of-life, supply is sourced from authorized global industrial spare part distributors. Refurbished modules undergo strict pre-shipment testing focused on analog input performance: contact continuity inspection, analog input precision calibration, output signal stability testing, filter performance validation, bus communication stability with 7AF104.7 base, and LED indicator function checks. Refurbished units typically come with 12–24 month supplier warranty coverage. Standard commissioning steps: plug module into a vacant 7AF104.7 slot, mount separate terminal block, wire field sensors and actuators, download parameter projects via Automation Studio. Disassembly of internal circuit boards or unauthorized manual hardware calibration is strictly forbidden during installation and maintenance. Long-term storage must be held in dry, temperature-stable warehouses to prevent plastic casing aging and oxidation of metal contact pins and terminal screws. During maintenance replacement, technicians must confirm full mechanical fit and electrical compatibility with System 2003 and 7AF104.7 base to avoid mismatches with later generations of B&R control hardware.