SIEMENS 3RX9501-0BA00
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SIEMENS | HMI | Power Supplies
- EICHLER-art.no.: K0146562
- EAN: 4011209641457
- UPC: 754554921501
Product description
AS-INTERFACE POWER SUPPLY IP20; OUT: AS-I DC30V, 3A IN: AC 120V/230V W. INTEGR. GROUND FAULT DETECTION W. INTEGR. OVERLOAD DETECTION
Services for SIEMENS 3RX9501-0BA00
SIEMENS |
3RX9501-0BA00 –
additional product information
| Delivery information | |||
|---|---|---|---|
| Export identifier | AL: N ECCN: N | ||
| Net weight | 0.547 | ||
| Quantity | 1 Stück | ||
| Packaging quantity | 1 | ||
| Additional product information | |||
|---|---|---|---|
| Product status | |||
| EAN | 4011209641457 | ||
| UPC | 754554921501 | ||
| Static lot number | 85044083 | ||
| List indicator | CC-IC10 | ||
| Product group | 3721 | ||
| Country of origin | RO | ||
| Compliance with the substance restrictions according to RoHS directive | Since: 20060701 | ||
| Product classifications | Version | Classification | |
|---|---|---|---|
| eClass | 4 | 27-24-21-07 | |
| eClass | 5.1 | 27-24-26-11 | |
| eClass | 6.0 | 27-24-26-11 | |
| ETIM | 3 | / | |
| ETIM | 4 | EC002583 | |
| ETIM | 5 | EC002583 | |
What is 3RX9501-0BA00 and where is it used?
The 3RX9501-0BA00 is a SIEMENS AS-Interface power supply unit designed to supply AS-i networks with 30 V DC and 3 A. The device is intended for automation applications in which sensors, actuators, AS-i masters and field devices must be supplied reliably while maintaining stable AS-i communication. To achieve this, the power supply integrates not only the voltage supply itself but also AS-i data decoupling, earth-fault detection and overload monitoring. Typical application areas include machine building, conveyor systems, packaging machinery, material handling systems and installations with decentralised I/O, where compact wiring, rapid diagnostics and minimal downtime are important. Depending on the system configuration, AS-i networks can support up to 31 standard slaves or 62 A/B slaves per network.
Overview of the key technical specifications and what they mean
The power supply operates from 120/230 V AC and supports an input range of 85–132 V AC or 176–253 V AC at 47–63 Hz. On the output side, it provides 30 V DC in accordance with the AS-i specification with a rated output current of 3 A. Current limiting is typically set to 3.5 A. In practical terms, this provides sufficient reserve capacity for typical AS-i segments, ensures a stable power supply and protects the network against overloads and short circuits. The residual ripple is extremely low, which supports reliable bus communication. The unit provides IP20 protection, Protection Class I, overvoltage protection below 35 V, a typical efficiency of 84%, an operating temperature range of -10 °C to +70 °C, and compact dimensions of 50 × 125 × 125 mm. Installation is on a 35 mm DIN rail in a vertical position with at least 50 mm clearance above and below the device to ensure adequate cooling.
Product status, life-cycle status and obsolescence
Siemens currently classifies the 3RX9501-0BA00 as an active product within the AS-Interface power supply family. For operators and purchasing departments, this is important because there is currently no indication of imminent discontinuation by the manufacturer, and the device remains fully supported within an established Siemens product family. No direct successor has been identified for the 3RX9501-0BA00 itself in the reviewed Siemens product documentation. However, the device is the official Siemens successor to the older 3RX9310-0AA00. Within the same product family, Siemens also offers variants designed for different supply concepts or higher power reserves, including 3RX9501-1BA00 with a 24 V DC input, 3RX9502-0BA00 with 5 A output current, and 3RX9503-0BA00 with 8 A output current. These alternatives should not be regarded as automatic one-to-one replacements and must be assessed against the specific input supply, load profile and system design.
Available EICHLER services and when they are relevant
For the 3RX9501-0BA00, EICHLER offers repair services, exchange units, used devices and new units on request. For maintenance personnel, a repair is particularly attractive when the existing assembly is already integrated into the installation and restoring the unit to operational condition quickly is more important than implementing a complete replacement strategy. According to EICHLER, repairs include technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. An exchange unit is especially useful during unplanned downtime when speed is more important than detailed root-cause analysis. Used devices can be a practical option for controlling costs or building up critical spare-parts stock at short notice. New units on request support procurement departments where documentation requirements, validation procedures or internal standards favour the use of new equipment. These services are specifically aimed at industrial and business users.
| Fault description | Possible solution |
|---|---|
| Why is the red Overload LED illuminated on the 3RX9501-0BA00? | The device continuously monitors overload conditions and automatically restarts after a short circuit or overload event. If the fault remains present, the AS-i network segment should be relieved step by step by disconnecting individual slaves or sub-sections in sequence, checking the current consumption and investigating sensors, actuators or cables that may be causing a short circuit. In cases of intermittent faults, it is often more effective to monitor bus voltage levels and signal symmetry than to rely solely on repeated resets. |
| Why does the AS-i master report "AS-i Power Fail"? | This diagnostic message indicates that the supply voltage on the AS-i cable is either too low or has failed completely. The mains supply, the correct 120/230 V setting, the green O.K. LED indicating adequate output voltage, the voltage between AS-i+ and AS-i−, and any potential overload caused by connected devices should all be checked. A defective slave device or a power supply that collapses under load can also trigger this message. |
| Why is an earth fault on AS-i+ or AS-i− being detected? | The power supply is capable of detecting earth faults within the AS-i cabling system. In this situation, only the "AS-i + SWITCHED" output is disabled. For effective troubleshooting, verify that the GND connection is correctly connected to the system earth point and check whether the AS-i cable or connected sensor wiring is unintentionally connected to ground. Common causes include damaged insulation, crushed cables or moisture within connection points. The fault should only be acknowledged using RESET or remote reset once the earth fault has genuinely been eliminated. |
| Why do several AS-i devices drop out intermittently, or why does a Config Error occur? | Intermittent failures affecting multiple devices often indicate a network quality issue rather than a simple addressing problem. Possible causes include excessive cable length, electromagnetic interference, ageing power supplies, a faulty slave device or an unstable network branch. In practical troubleshooting, it is recommended to systematically review the master diagnostics, measure voltages relative to GND and between AS-i+ and AS-i−, and disconnect network branches one at a time. If the fault behaviour changes after disconnecting a particular branch, the source of the problem can usually be identified much more quickly. |
| Why can the fault be acknowledged with RESET, but then reappears? | The LED diagnostics are designed as a latched indication. Performing a RESET clears the displayed fault but does not remove the underlying cause. If the fault returns, there is usually still an active earth fault, overload condition or intermittent bus fault present. In such cases, the focus should shift from repeatedly resetting the device to identifying the fault under actual operating conditions, for example by checking moving cables, borderline loads, defective slave devices or voltage dips occurring during specific machine operating states. |
Is 3RX9501-0BA00 still an active Siemens product?
Yes. Siemens currently lists the 3RX9501-0BA00 as an active product within the AS-Interface power supply family. For purchasing and maintenance departments, this is an important advantage because procurement, documentation and technical identification remain significantly simpler than for products that have already been discontinued.
Is 3RX9501-0BA00 a direct successor to 3RX9310-0AA00?
Yes. Siemens identifies the 3RX9501-0BA00 as the successor to the 3RX9310-0AA00. This is particularly relevant when older installations are still documented with the predecessor part number and a clear spare-part replacement is required during a fault situation. Nevertheless, before replacing the unit, it is always advisable to verify that the wiring, current demand and installation arrangement remain compatible with the specific application.
How can I determine whether 3RX9501-0BA00, 3RX9502-0BA00, 3RX9503-0BA00 or 3RX9501-1BA00 is the correct choice?
The deciding factors are the input supply type and the required current reserve. The 3RX9501-0BA00 is the 3 A version for 120/230 V AC input. The 3RX9501-1BA00 also provides 3 A, but is designed for a 24 V DC input supply. The 3RX9502-0BA00 increases the available output current to 5 A, while the 3RX9503-0BA00 provides 8 A. To make a reliable selection, the total current consumption of all AS-i devices, possible inrush currents and future expansion requirements should be considered. A higher current rating is not always mandatory, but it is often beneficial when additional reserve capacity is required for load peaks or future system extensions.
Can I simply replace the 3RX9501-0BA00 with a standard 24 V power supply?
Not directly. A dedicated AS-i power supply such as the 3RX9501-0BA00 includes the data decoupling circuitry required for AS-i communication. If a standard 24 V power supply is used instead, a separate AS-i data decoupling module must be integrated into the network. Siemens also notes that, for an AS-i network with unrestricted AS-i functionality, a dedicated 30 V AS-i power supply is often recommended or required. For installations with long cable runs, communication-sensitive applications or mixed device populations, a genuine AS-i power supply is therefore usually the safer solution.
Which installation and environmental conditions are important for the 3RX9501-0BA00?
The device is designed for installation on a 35 mm DIN rail and should be mounted vertically. Siemens additionally specifies a minimum clearance of 50 mm above and below the unit to ensure adequate cooling. The protection rating is IP20, meaning the power supply should be installed inside a suitable control cabinet or protected enclosure. The permissible operating temperature range is -10 °C to +70 °C. In compact control cabinets, the combination of mounting position, cooling clearance and ambient temperature is often critical to maintaining a stable power supply over the long term.
How many devices can an AS-i network powered by the 3RX9501-0BA00 support?
From an AS-i protocol perspective, a network can support up to 31 standard slaves or 62 A/B slaves. Whether these limits can be achieved in practice depends not only on the protocol but also on the actual current consumption of all connected devices. The 3RX9501-0BA00 provides 3 A of output current, so any replacement or new installation should include an assessment of the current load, inrush currents and reserve capacity for future expansion to ensure that the total demand remains within this limit.
Does the 3RX9501-0BA00 support remote fault acknowledgement?
Yes. The power supply supports a remote reset function via terminals 41 and 42. This is particularly useful in installations where fault acknowledgement is handled through the control cabinet architecture or via a higher-level service and diagnostic system. It is important to remember that fault acknowledgement does not eliminate the underlying cause. While a stored fault can be reset, an active earth fault or overload condition will immediately generate a new fault indication if the root cause has not been corrected
