Description
B&R 7AO352.70 Analog Output Module
Product Dimensions：
The B&R (Bernecker + Rainer) 7AO352.70 is a high-density analog output module from the System 2005 series. It is designed to provide precise control signals to industrial actuators, such as variable speed drives, proportional valves, and positioning systems.
Product Detailed Description
The 7AO352.70 is an 8-channel analog output module. It converts digital values from the PLC CPU into standard analog voltage or current signals. Each channel is individually configurable, allowing for a mix of different signal types within the same module. It is a “System 2005” component, meaning it is built for high-performance backplane communication and long-term industrial reliability.
Technical Parameters
| Parameter | Specification |
| Model Number | 7AO352.70 |
| Number of Channels | 8 |
| Output Signal Types | \pm 10 V, 0 to 10 V, 0 to 20 mA, 4 to 20 mA |
| Resolution | 12-bit (typical for System 2005) |
| Accuracy | \pm 0.1\% of full scale (at 25°C) |
| Update Time | < 2 ms for all channels |
| Load Impedance (Voltage) | > 1 k\Omega |
| Load Impedance (Current) | < 500 \Omega |
| Galvanic Isolation | Channel to backplane (500 V) |
| Power Consumption | Max 4.5 W |
Product Advantages
- High Channel Density: 8 channels in a single slot width saves significant space in the PLC rack.
- Versatile Configuration: The ability to switch between voltage and current modes via software means you don’t need different hardware for different types of actuators.
- Robust Diagnostics: Features integrated monitoring for output short circuits (voltage mode) and open loops (current mode), which simplifies troubleshooting in the field.
- Deterministic Performance: Optimized for the B&R backplane, ensuring that analog outputs are updated with minimal jitter, which is crucial for high-speed motion control.
Important Considerations (Precautions)
- Shielding: To prevent electromagnetic interference (EMI) from affecting signal precision, always use shielded twisted-pair cables and ensure the shield is grounded at the PLC end.
- External Power: Ensure the System 2005 power supply module has enough capacity to handle the current draw, especially when multiple channels are running in 20mA current loop mode.
- Signal Interference: Avoid routing the analog output cables parallel to high-voltage power lines or motor cables to prevent “noise” injection into the control signal.
- Calibration: While factory-calibrated, critical applications should verify the output levels during commissioning to account for voltage drops over long cable runs.
Product Applications
The 7AO352.70 is widely used in complex automation tasks:
- Motion Control: Providing speed setpoints to Variable Frequency Drives (VFDs) or DC motor controllers.
- Process Control: Regulating flow and pressure by controlling proportional valves in hydraulic or pneumatic systems.
- Heating/Cooling: Managing power controllers for industrial furnaces or climate control systems.
- Test Benches: Simulating sensor inputs for testing other electronic control units in automotive or aerospace laboratories.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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