Description

The B&R 7AO352.70 is a high-density 16-channel analog output module designed for precision control in demanding automation systems. As part of B&R Automation’s (ABB Group) modular X20 System, this unit delivers unparalleled flexibility by supporting both voltage (0–10 V) and current (0–20 mA, 4–20 mA) outputs on every channel via software configuration—eliminating hardware reconfiguration. Engineered for real-time control applications, the 7AO352.70 translates digital commands from PLCs into stable, high-accuracy analog signals to actuate valves, variable frequency drives (VFDs), proportional hydraulics, and servo amplifiers. Its 16-bit resolution ensures precise control over processes requiring fine adjustments, such as chemical dosing or web tension regulation.

The module’s compact 25 mm width maximizes cabinet space efficiency, while channel-to-channel isolation (500 V AC) prevents cross-talk and ground loops in multi-channel setups. Leveraging B&R’s deterministic X2X Link technology, the B&R 7AO352.70 achieves synchronized output updates with ≤10 µs jitter—critical for motion control coordination and multi-axis systems. Integrated diagnostics monitor load conditions, wire breaks, and short circuits, feeding real-time health data to B&R’s Automation Studio engineering environment. Designed for industrial resilience (-40°C to +60°C operation, 60g shock resistance), the 7AO352.70 empowers engineers to deploy scalable, high-speed control architectures without compromising precision or reliability.

7AO352.70 B&R

Technical Specifications

Parameter Name	Parameter Value
Product Model	7AO352.70
Manufacturer	B&R Automation (ABB Group)
Product Type	Analog Output Module
Number of Channels	16
Output Types	0–10 V, 0–20 mA, 4–20 mA (Software-Selectable per Channel)
Resolution	16-bit
Accuracy	≤ ±0.1% of Full Scale (Voltage), ≤ ±0.2% (Current)
Load Impedance	≥ 1 kΩ (Voltage), ≤ 500 Ω (Current)
Channel Isolation	500 V AC (Channel-to-Channel)
Update Time	1 ms per Channel (All Channels)
Connection Interface	X2X Link (Front-Mountable)
Power Supply	24 V DC (-15%/+20%)
Operating Temperature	-40°C to +60°C
Derating	Linear derating above +55°C
Certifications	CE, UL, IEC 61131-2, SIL 2 (IEC 61508)

Main Features and Advantages

Universal Channel Flexibility: The B&R 7AO352.70 revolutionizes system design by allowing any channel to independently output voltage or current signals without jumpers or hardware swaps. This eliminates spare module inventory and enables last-minute application changes—critical in flexible manufacturing lines. Each channel provides short-circuit protection and open-wire detection, with fault status relayed instantly to the controller.

Ultra-Fast Synchronization: Utilizing B&R’s X2X Link technology, the module achieves deterministic output updates with microsecond precision. This enables tightly coordinated control across hundreds of axes in packaging machinery or printing presses. The 7AO352.70 supports oversampling (configurable up to 10 kHz per channel) for generating smooth motion profiles and mitigating mechanical resonance.

Robust Industrial Design: Engineered for harsh environments, the module withstands 60g mechanical shock and continuous vibration (5g, 10–150 Hz). Redundant power contacts allow daisy-chained supply wiring, reducing cabling. Front-accessible connectors simplify maintenance, while hot-swap capability (with compatible controllers) enables module replacement without system shutdown. Integrated heat dissipation ensures stable performance at full load, even in high ambient temperatures. Combined with B&R’s Automation Studio’s drag-and-drop configuration, the B&R 7AO352.70 slashes engineering time by 40% compared to traditional analog modules.

Application Field

The B&R 7AO352.70 excels in industries requiring multi-channel precision actuation with minimal latency. In automotive assembly, it controls robotic paint sprayers by synchronizing 50+ pressure regulators for uniform coating thickness and dynamic trajectory adjustments. Plastic extrusion lines leverage its 16-channel density to manage zone temperatures, screw speeds, and puller tensions simultaneously, ensuring dimensional stability in film production.

Chemical processing plants deploy the 7AO352.70 for precision dosing of catalysts and additives via control valves, with SIL 2 safety compliance enabling use in safety instrumented functions. In energy storage, it governs battery formation equipment by regulating charge/discharge currents across hundreds of cells in parallel. The module also drives servo-hydraulic test rigs in aerospace, simulating flight loads with 0.01% FSR accuracy. For HVAC optimization in smart buildings, it modulates VFDs for chillers and pumps based on real-time demand. Its noise immunity and shock tolerance make it ideal for mobile machinery—e.g., controlling electrohydraulic proportional valves in timber harvesters or tunnel boring equipment.

7AO352.70 B&R

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