Siemens P350-3 6AU1350-3AK41-1BE2 ISOPROFIBUS Board | Replacement, Equivalent & Selection Guide
The Siemens 6AU1350-3AK41-1BE2 (P350-3 ISOPROFIBUS Board) is a dedicated PROFIBUS communication interface card designed for the Siemens SINUMERIK 840D / 840Di CNC control platform. It enables high-speed, deterministic PROFIBUS-DP communication between the NCU (Numerical Control Unit) and distributed I/O peripherals, drives, and field devices. Konmask.com supplies this board as a genuine OEM part and can assist with compatible replacement selection.
Technical Specifications
- Part Number: 6AU1350-3AK41-1BE2
- Series / Module: P350-3
- Function: ISOPROFIBUS Communication Board
- Protocol: PROFIBUS-DP (IEC 61158)
- Interface: Isochronous PROFIBUS-DP Master
- Compatible Platform: SINUMERIK 840D sl / 840Di sl NCU
- Form Factor: Plug-in PCB module
- Weight: approx. 6.9 kg (packaged)
- Manufacturer: Siemens AG, Germany
- HS Code: 8537.10 (programmable controllers / communication modules)
Compatible Replacement & Equivalent Models
When the original 6AU1350-3AK41-1BE2 is unavailable or discontinued, the following models may serve as functional equivalents depending on your NCU firmware version and hardware revision. Always verify compatibility with your system integrator before substitution.
- 6AU1350-3AK41-1AA0 – Earlier hardware revision; same ISOPROFIBUS function, verify firmware compatibility
- 6AU1350-3AK41-1AB0 – Intermediate revision; check NCU slot and connector pinout
- 6SN1145-1BA02-0CA0 – PROFIBUS interface for SIMODRIVE 611D; applicable in mixed-drive topologies
- 6FC5303-0AF36-1AA0 – NCU communication expansion; consult Siemens compatibility matrix
- Third-party PROFIBUS DP master cards – Only recommended with full system validation; contact Konmask for assessment
Note: Konmask.com recommends using genuine Siemens parts for safety-critical CNC applications. Contact our team for a compatibility assessment before ordering a substitute.
Why Choose the Original Model
- Isochronous PROFIBUS-DP ensures deterministic cycle times critical for CNC axis synchronization
- Factory-validated firmware pairing with SINUMERIK 840D sl NCU eliminates integration risk
- Full Siemens warranty & lifecycle support with traceable serial numbers
- CE / UL certified for industrial safety compliance
- Long-term availability through authorized distribution channels
Typical Applications
- CNC machining centers using SINUMERIK 840D sl control
- Multi-axis turning and milling machines with distributed PROFIBUS I/O
- Automotive body-in-white welding lines with synchronized servo drives
- Aerospace precision machining with real-time fieldbus requirements
- Retrofit and upgrade projects replacing older SINUMERIK 840D (non-sl) systems
System Compatibility
- NCU: SINUMERIK 840D sl NCU 710.3, 720.3, 730.3
- Drive: SINAMICS S120 via PROFIBUS-DP
- I/O: ET 200S, ET 200M distributed I/O stations
- Software: SINUMERIK Operate, ShopMill, ShopTurn
- Not compatible with: SINUMERIK 808D, 828D (different communication architecture)
Selection Guide
Use the following criteria to confirm the correct part for your application:
- Step 1 – Identify your NCU type: Check the NCU nameplate for model number (710.3 / 720.3 / 730.3)
-
Step 2 – Check hardware revision: The suffix
-1BE2indicates hardware revision E2; match this to your system’s required revision - Step 3 – Verify PROFIBUS topology: Confirm number of PROFIBUS nodes, baud rate (max 12 Mbit/s), and cable length
- Step 4 – Firmware version: Ensure NCU firmware ≥ V4.5 for full isochronous mode support
- Step 5 – Contact Konmask: Provide your NCU serial number and current board revision for a confirmed compatibility check
Quality Assurance & Sourcing
- All units sourced from authorized Siemens distribution channels or verified surplus with full traceability
- Pre-shipment inspection: visual, functional power-on test, and PROFIBUS enumeration check
- Packaging: anti-static ESD bag + foam-lined carton with humidity indicator
- Documentation: original Siemens datasheet, test report, and certificate of conformity included
- Warranty: 12 months from date of shipment (Konmask standard warranty)
How to Order
- Part Number: 6AU1350-3AK41-1BE2
- MOQ: 1 piece
- Lead Time: In-stock items ship within 2 business days; sourced items 7–21 days
- Payment: T/T, PayPal, credit card via Shopify Payments
- Shipping: DHL / FedEx Express worldwide; sea freight available for bulk orders
- RFQ: Email support@konmask.com or call +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I use 6AU1350-3AK41-1AA0 instead of 6AU1350-3AK41-1BE2?
A: Possibly, but hardware revision differences may affect firmware compatibility. Always verify with Siemens or contact Konmask before substitution.
Q: Is this board compatible with SINUMERIK 828D?
A: No. The 828D uses an integrated PROFIBUS interface and does not accept P350-3 plug-in boards.
Q: Do you supply refurbished units?
A: Yes, clearly labeled as “refurbished” with a 6-month warranty. New OEM units are also available.
Q: Can Konmask test the board before shipping?
A: Yes. Functional power-on and PROFIBUS enumeration testing is standard for all units.
Q: What is the typical failure mode for this board?
A: Common failures include PROFIBUS communication loss after power surge, corrupted firmware, or physical connector damage. Konmask can assess and advise on repair vs. replacement.
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Contact: support@konmask.com | +0086 19859288691
