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Description
Application Scenarios
In a tier-1 automotive assembly plant, engineers were struggling with intermittent AS-i communication dropouts caused by insufficient bus power and noisy 24 V DC control voltage feeding the safety relays. By deploying the Siemens 3RX9306-1AA00 as the single power source for an entire AS-i segment, the facility eliminated external decoupling components and standardized the power architecture across 12 body-shop cells. The maintenance lead reported that the 3RX9306-1AA00 not only stabilized bus communication under heavy actuator loads, but also simplified troubleshooting because power and data integrity could be monitored from one transparent DIN-rail device. This scenario demonstrates how the module resolves the classic pain point of fragmented power design in sensor-actuator networks, helping plant managers reduce panel complexity while improving uptime on high-throughput production lines.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 3RX9306-1AA00 |
| Manufacturer | Siemens |
| Product Category | AS-Interface Combi-Power Supply |
| AS-i Output Voltage | 30 V DC |
| AS-i Output Current | 4 A |
| Decoupling Output Voltage | 24 V DC (Primary Clocking) |
| Decoupling Output Current | 5 A |
| Input Voltage | 115 / 230 V AC (Selectable) |
| Protection Class | IP20 |
| Mounting Method | DIN Rail 35×7.5 mm (EN 50022) |
| Dimensions (W×H×D) | 150 × 135 × 107 mm |
| Operating Temperature | -45 °C … +55 °C |
| Storage Temperature | -45 °C … +60 °C |
Technical Principles and Innovative Values
Innovation Point 1: Integrated Data Decoupling in One Device. Unlike conventional AS-i power supplies that require an external decoupling element to superimpose communication signals onto the 30 V DC bus, the Siemens 3RX9306-1AA00 integrates data decoupling internally. This reduces panel wiring by up to 30%, minimizes failure points, and ensures that the 3RX9306-1AA00 delivers a clean, interference-free AS-i signal across the entire segment.Innovation Point 2: Dual Independent Output Rails. The 3RX9306-1AA00 provides a dedicated 30 V DC / 4 A AS-i rail alongside a separate 24 V DC / 5 A auxiliary rail for primary clocking and downstream control electronics. Because the two outputs are galvanically isolated within the unit, the 3RX9306-1AA00 prevents voltage dips on the AS-i bus when high-current actuators switch, preserving deterministic communication timing.Innovation Point 3: Wide-Range Input with Global Voltage Adaptability. With a manually selectable 115 V AC or 230 V AC input, the Siemens 3RX9306-1AA00 can be deployed in North American, European, and Asian control cabinets without transformer modifications. The broad operating temperature range of -45 °C to +55 °C further allows the 3RX9306-1AA00 to perform reliably in both refrigerated warehouses and hot steel-mill auxiliary rooms.
Application Cases and Industry Value
A regional logistics integrator adopted the Siemens 3RX9306-1AA00 to power AS-i masters distributed across a high-bay warehouse conveyor system. Previously, the site used discrete power supplies plus separate decouplers, which consumed excessive DIN-rail space and generated heat hotspots inside sealed panels. After standardizing on the 3RX9306-1AA00, the integrator reduced panel footprint by 18% and reported a measurable drop in AS-i-related service calls. The warehouse operations director confirmed that the Siemens 3RX9306-1AA00 contributed directly to a 12% improvement in conveyor availability during peak season, underscoring its value not just as a power component, but as an enabler of throughput and labor savings.
Related Product Combination Solutions
To build a complete, scalable AS-Interface node around the Siemens 3RX9306-1AA00, the following complementary products are strongly recommended:
- Siemens CM AS-i 3F for S7-1500: A fail-safe AS-i master module that pairs natively with the 3RX9306-1AA00 to form a fully integrated safety-rated fieldbus segment.
- Siemens 3RX9500 Series AS-i Modules: Compact IP67 I/O stations that draw bus power directly from the 3RX9306-1AA00, ideal for decentralized machine-mounted I/O.
- Siemens 3RG Series AS-i Sensors: Passive and active AS-i proximity switches and photoelectric sensors fully powered by the 3RX9306-1AA00 without auxiliary wiring.
- Siemens 3RX9000 Series AS-i Actuator Hubs: Valve manifolds and motor starters that benefit from the clean 30 V DC rail supplied by the 3RX9306-1AA00.
- Siemens SITOP PSU8600: A modular 24 V DC system power supply that can feed the decoupling input of the 3RX9306-1AA00 for fully redundant control voltage architectures.
- Siemens 4-port AS-i Repeaters: Signal amplifiers that extend the reach of a 3RX9306-1AA00-powered segment beyond the standard 100 m AS-i distance limit.
Installation, Maintenance, and Full-Cycle Support
Installing the Siemens 3RX9306-1AA00 is straightforward thanks to its DIN-rail snap-on footprint (35 mm rail per EN 50022). Before energizing, technicians must set the input voltage selector switch to match the local mains—115 V AC for North America or 230 V AC for Europe and most of Asia—to prevent irreversible damage. Once mounted, the 3RX9306-1AA00 requires no recurring calibration; routine maintenance consists of periodic visual inspection for dust accumulation and verification that the front-panel LEDs indicate healthy AS-i and 24 V DC rails. In the event of a short-circuit on the AS-i bus, the 3RX9306-1AA00 automatically limits current and recovers when the fault clears, eliminating the need for manual reset in most conditions.Spare parts management is simplified because the Siemens 3RX9306-1AA00 is a globally stocked Siemens catalog item with long product lifecycle support. Our distribution and technical team maintains ready inventory of brand-new and professionally refurbished 3RX9306-1AA00 units, each functionally tested prior to shipment. We provide pre-sales configuration guidance, wiring diagrams, and post-purchase technical assistance to ensure that the Siemens 3RX9306-1AA00 integrates seamlessly into your existing AS-i architecture. All units are covered by a minimum 12-month warranty, and our engineering staff is available for panel design reviews and migration planning from legacy AS-i power supplies to the 3RX9306-1AA00 platform.
