Description
7AO352.70 B&R Analog Output Module
Product Dimensions：
Product Description (Detailed Explanation)
The 7AO352.70 (Model AO352) is an expansion module that translates digital CPU data into analog electrical signals. It features 2 analog output channels with a resolution of 12 bits. This module is typically inserted into a base plate (screw-in module) of the System 2003 rack.
Each channel is independently configurable to output standard voltage or current ranges. Its modular design allows for “bit-specific” expansion, ensuring that control cabinets remain compact while providing the necessary signal interfaces for complex automation tasks.
Product Parameters (Technical Specifications)
| Parameter Category | Specification |
| Product Family | B&R System 2003 |
| Number of Outputs | 2 Analog Channels |
| Resolution | 12 Bit |
| Output Signal (Voltage) | $\pm$ 10 V |
| Output Signal (Current) | 0 to 20 mA or 4 to 20 mA |
| Update Time | Approx. 1 ms per channel |
| Galvanic Isolation | 500 V (between bus and output) |
| Internal Power Consump. | Max. 1.5 W |
| Terminal Block | TB712 (ordered separately) |
| Weight | Approx. 140 g |
Product Advantages (Key Benefits)
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High Precision: 12-bit resolution provides fine-grained control, making it ideal for high-precision motor speed regulation and valve positioning.
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Dual Output Mode: The flexibility to switch between voltage ($\pm$10V) and current (4-20mA) signals on a single module reduces inventory costs.
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Compact “Screw-in” Form Factor: Plugs directly into the System 2003 base, saving significant DIN rail space compared to traditional block I/O.
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Electrical Safety: Integrated galvanic isolation protects the central CPU and backplane bus from electrical noise or surges originating in the field.
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Fast Response: Short cycle times ensure that the module can keep up with high-speed PID loops in motion control applications.
Precautions (Important Notes)
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Terminal Block Requirement: This module does not include the wiring connector. You must separately order the TB712 terminal block for field connections.
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External Load Limits: For current outputs, ensure the load resistance does not exceed the maximum specified value (typically 500 $\Omega$ for 20mA). Overloading will cause signal saturation.
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Shielding: To prevent EMI/RFI interference, use shielded twisted-pair cables for all analog signal lines. The shield should be grounded at the designated ground bar in the cabinet.
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Slot Compatibility: Ensure the module is securely screwed into the System 2003 base plate to maintain consistent contact with the backplane bus pins.
Product Applications (Typical Use Cases)
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Variable Frequency Drives (VFD): Sending 0-10V or 4-20mA speed reference signals to industrial AC/DC motor drives.
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Proportional Valve Control: Modulating the opening of hydraulic or pneumatic proportional valves in heavy machinery.
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Signal Forwarding: Re-transmitting processed sensor data from the PLC to external recorders, displays, or SCADA terminals.
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Temperature Control: Controlling the power output of thyristor-driven heating elements via a 4-20mA control loop.
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Actuator Management: Precise positioning of dampers in HVAC systems or flow control valves in chemical processing skids.
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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