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Phone：+86 15383419322Description
The B&R 7AO352.70 is a high-performance 8-channel analog output (AO) module designed for the X20 system, part of B&R Automation’s (a member of the ABB Group) modular and scalable industrial automation platform. This compact I/O module delivers precise, real-time analog signals to control actuators such as proportional valves, variable-frequency drives (VFDs), heaters, and positioners in demanding machine and process applications.
Each of the 8 channels on the 7AO352.70 is individually configurable via software to output either ±10 V voltage or 0–20 mA / 4–20 mA current, eliminating the need for hardware jumpers or external signal conditioners. With 16-bit resolution, the module ensures fine-grained control—critical for applications like extruder temperature regulation, hydraulic pressure control, or robotic path smoothing. All channels feature galvanic isolation from the internal bus and system ground, protecting the controller from field-side transients and ground loops.
Designed for ease of use and reliability, the 7AO352.70 supports hot swapping in compatible X20 configurations, enabling module replacement without shutting down the entire system—ideal for continuous production lines. Integrated status LEDs per channel provide immediate visual feedback for diagnostics, while comprehensive error reporting (e.g., wire break, overload) is accessible through B&R Automation Studio engineering software. The module mounts on a standard X20 backplane and draws power directly from it, simplifying cabinet layout and reducing wiring complexity.
Widely used in industries such as packaging, printing, semiconductor manufacturing, and renewable energy, the 7AO352.70 exemplifies B&R’s commitment to precision, flexibility, and long-term availability in industrial I/O solutions.
B&R 7AO352.70
Technical Specifications
| Parameter | Specification |
| Model Number | 7AO352.70 |
| Manufacturer | B&R Industrial Automation (ABB Group) |
| System Compatibility | B&R X20 System |
| Module Type | Analog Output (AO) |
| Number of Channels | 8 |
| Output Types (per channel) | • Voltage: ±10 V • Current: 0–20 mA or 4–20 mA |
| Resolution | 16 bits |
| Accuracy | ±0.1% of full scale (typical) |
| Update Time (all channels) | ≤ 1 ms |
| Isolation | Galvanic isolation between field and bus (500 V RMS) |
| Load Capability | • Voltage: ≥ 2 kΩ • Current: ≤ 500 Ω |
| Protection | Short-circuit and overload protection per channel |
| Indicators | Green PWR LED + 8 yellow channel status LEDs |
| Mounting | Snap-on to X20 backplane (DIN rail compatible) |
| Operating Temperature | 0°C to +55°C |
| Certifications | CE, UL, cULus, KC |
Main Features and Advantages
✅ Universal Per-Channel Configuration:
No need to stock multiple AO modules—each channel on the 7AO352.70 can be independently set to voltage or current mode via Automation Studio, adapting to mixed-field device requirements in a single machine.
✅ High Precision & Speed:
With 16-bit resolution and sub-millisecond update rates, the module supports closed-loop control tasks requiring smooth, jitter-free analog signals—such as tension control in web handling or laser power modulation.
✅ Robust Diagnostics & Safety:
Built-in detection of open circuits (in current mode) and short circuits (in voltage mode) triggers alarms in the PLC logic, enabling predictive maintenance and preventing process drift or equipment damage.
✅ Seamless ABB/B&R Ecosystem Integration:
Works natively with ACOPOS servo drives, X20 CPUs, Panel PCs, and mapp Technology software components (e.g., mapp View, mapp IO), accelerating application development and commissioning.
✅ Future-Proof & Maintainable:
Hot-swappable design and backward compatibility within the X20 family ensure easy upgrades and minimal downtime—critical for 24/7 operations in food processing or automotive assembly.
Application Field
In a pharmaceutical filling line, the 7AO352.70 precisely controls peristaltic pump speeds (via 0–10 V) and regulates sterilization chamber temperatures (via 4–20 mA to steam valves)—ensuring batch consistency and compliance with GAMP 5.
At an automotive paint shop, it outputs analog signals to robotic spray gun regulators and oven zone controllers, maintaining exact coating thickness and curing profiles across thousands of vehicles daily.
In a wind turbine pitch control system, the 7AO352.70 sends real-time ±10 V commands to hydraulic servo valves that adjust blade angles—maximizing energy capture while minimizing mechanical stress during gust events.
B&R 7AO352.70
Related Products
- X20CP1585 / X20CP3585: X20 CPU modules—required to control the70
- 70: 8-channel analog input counterpart—often used in same chassis for closed-loop systems
- X20TB12 / X20TB52: Terminal blocks—for screw or spring-cage field wiring to the module
- 70: Digital output module—complements AO in hybrid I/O racks
- ACOPOS P3: Servo drive system—can receive analog setpoints from70 if needed
- Automation Studio: Engineering software for configuration, programming, and diagnostics
- X20BM11 / X20BM15: Backplanes—for mounting multiple X20 modules including70
