Supply 3RX9306-1AA00 SIEMENS AS-Interface combi-power supply Wholesale Factory

AS-Interface combi-power supply Summary

The Siemens 3RX9306-1AA00 is a rail-mounted, primary-switched AS-Interface combi power supply unit designed for industrial automation systems. It features an integrated data decoupling function, allowing it to simultaneously deliver 30 V DC (4 A) to power the AS-i network and a separate 24 V DC (5 A) auxiliary output for load voltage supply. Operating on a switchable single-phase input (115/230 V AC), this IP20-rated unit provides optimal space savings and reliable short-circuit protection in control cabinets.
(Note: This product is officially discontinued; the recommended replacement setup is the 3RX9502-0BA00 decoupling module paired with a SITOP 6EP1333-2AA01 power supply).

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SIEMENS AS-Interface combi-power supply Applications & Use Cases

The Siemens 3RX9306-1AA00 is designed for industrial automation systems utilizing the AS-Interface (AS-i) networking standard. This specific 3RX9306-1AA00 model is primarily used in control cabinets where space optimization is critical, serving two main functions at once:

AS-i Bus Communication: The 3RX9306-1AA00 delivers the regulated 30 V DC power required to run the AS-i network cable, while its integrated data decoupling loop ensures interference-free signal transmission.

Auxiliary Power Supply: Beyond the bus line, the 3RX9306-1AA00 unit provides a separate 24 V DC output to power standard field devices (such as inductive sensors and solenoid valves), eliminating the need for an additional standalone power supply.

Typical Industry Sectors for the SIEMENS AS-Interface combi-power supply:

Conveyor & Logistics Systems: Implementing 3RX9306-1AA00 modules to power distributed sensors along long sorting lines.
Automotive Assembly Lines: Utilizing the Siemens 3RX9306-1AA00 to manage distributed digital signals across manufacturing cells.
Packaging Machinery: Deploying the 3RX9306-1AA00 to coordinate high-speed, localized sensors and valve manifolds.

SIEMENS AS-Interface combi-power supply FAQ

Q1: How do I set the input voltage for the 3RX9306-1AA00? What is its tolerance?

A1: The 3RX9306-1AA00 SIEMENS supports 115 V or 230 V AC single-phase input, which must be selected manually via the built-in switch before powering up. The allowable input range for the 3RX9306-1AA00 SIEMENS is 102 V to 132 V AC (at 115 V setting) and 195 V to 253 V AC (at 230 V setting), with a network frequency compatibility of 50/60 Hz.

Q2: What is the primary input current of the 3RX9306-1AA00? What fuse should I use?

A2: Under full load, the rated primary input current for the 3RX9306-1AA00 SIEMENS is 1.1 A + 1.1 A at 115 V AC input, and 0.6 A + 0.6 A at 230 V AC input. To handle the initial startup inrush current of the 3RX9306-1AA00 SIEMENS, always install a slow-blow protective fuse or circuit breaker with a C or D time-delay characteristic.

Q3: What are the output ripple and noise limits for the 3RX9306-1AA00?

A3: The 3RX9306-1AA00 SIEMENS features built-in filtering that strictly complies with AS-i standards to prevent signal interference. The output metrics of the 3RX9306-1AA00 SIEMENS include a maximum ripple of 300 mV (0–10 kHz) and maximum spike noise of 50 mV (10–500 kHz), ensuring highly stable data transmission in harsh electrical environments.

Q4: How does the 3RX9306-1AA00 handle short circuits and overloads?

A4: The 3RX9306-1AA00 SIEMENS has built-in electronic protection that activates current-limiting mechanism when loads exceed a minimum of 4 A on the 30 V AS-i line or 5 A on the 24 V auxiliary line. Once the short circuit or overload fault is removed, the 3RX9306-1AA00 SIEMENS automatically resets and resumes normal voltage output without requiring any manual intervention.

Q5: What are the mounting and temperature limits for the 3RX9306-1AA00?

A5: The SIEMENS 3RX9306-1AA00 mounts on a standard 35 mm DIN rail and operates reliably within a wide ambient temperature range of -45 °C to +55 °C. To ensure proper natural convection cooling for the SIEMENS AS-Interface combi-power supply, install the module vertically and leave sufficient air clearance around the unit inside the control cabinet.

Q6: What physical changes happen when replacing the 3RX9306-1AA00 with the official successor?

A6: The official replacement setup for the SIEMENS 3RX9306-1AA00 requires combining a SIEMENS 3RX9306-1AA00 decoupling module with a 6EP1333-2AA01 power supply. Upgrading from the SIEMENS 3RX9306-1AA00 increases the required horizontal DIN rail space to 120 mm (70 mm + 50 mm), and requires routing the new power supply output through the decoupling module before connecting to the AS-i bus.

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