Siemens 6ES7972-0AA02-0XA0 PROFIBUS DP Repeater – SIMATIC S7-300 Network Extension Module
When a PROFIBUS DP network segment fails or loses signal integrity, the consequences on the plant floor are immediate and severe: PLCs lose communication with remote I/O stations, drives go into fault mode, and entire production lines halt without warning. In time-critical industries such as automotive assembly, chemical processing, and power generation, even minutes of unplanned downtime translate into significant financial losses and safety risks. The Siemens 6ES7972-0AA02-0XA0 PROFIBUS Repeater is the engineered solution that prevents this scenario — reliably amplifying and regenerating the PROFIBUS DP signal to maintain uninterrupted communication across extended or electrically noisy network topologies.
Within the SIMATIC S7-300 ecosystem, the 6ES7972-0AA02-0XA0 occupies a critical infrastructure role. As a second-generation RS-485 repeater designed specifically for PROFIBUS DP networks, it enables engineers to extend individual bus segments beyond the standard cable length limits and to electrically isolate segments for improved noise immunity. Globally, this module is a trusted component in thousands of industrial installations — from European automotive plants to Asian petrochemical facilities — where PROFIBUS DP remains the backbone fieldbus protocol for deterministic, real-time device communication.
Technical Specifications
- Part Number: 6ES7972-0AA02-0XA0
- Manufacturer: Siemens AG
- Product Family: SIMATIC S7-300 / PROFIBUS DP Accessories
- Function: RS-485 Repeater for PROFIBUS DP networks
- Bus Segments: Connects up to 2 PROFIBUS DP segments (A1 and A2)
- Max. Cable Length per Segment: Up to 1,200 m (at 9.6 kbps); segment length depends on baud rate
- Supported Baud Rates: 9.6 kbps to 12 Mbps (automatic baud rate detection)
- Supply Voltage: 24 V DC
- Current Consumption: Refer to official Siemens datasheet
- Electrical Isolation: Galvanic isolation between bus segments A1 and A2
- Mounting: DIN rail (35 mm) or S7-300 profile rail
- Ambient Temperature (Operation): 0 °C to +60 °C
- Degree of Protection: IP20
- Dimensions (W × H × D): Refer to official Siemens datasheet
- Weight: Approx. 245 g
- Certifications: CE, UL (refer to product documentation)
Key Features & Benefits
- Automatic Baud Rate Detection: Eliminates manual configuration — the repeater automatically adapts to the network baud rate from 9.6 kbps to 12 Mbps, reducing commissioning time.
- Galvanic Isolation Between Segments: Provides electrical isolation between bus segment A1 and A2, protecting sensitive devices from ground loops and transient voltage spikes common in industrial environments.
- Signal Regeneration: Fully regenerates the PROFIBUS DP signal rather than simply amplifying it, ensuring clean, noise-free communication even over long cable runs.
- Segment Extension: Allows engineers to cascade multiple repeaters to extend the total PROFIBUS network far beyond a single segment’s physical limit.
- DIN Rail Mounting: Standard 35 mm DIN rail compatibility ensures easy integration into existing control cabinet layouts.
- Diagnostic LED Indicators: Onboard LEDs provide immediate visual feedback on power status and bus activity, simplifying fault diagnosis during commissioning and maintenance.
- Compact Form Factor: Space-efficient design minimizes cabinet footprint without compromising functionality.
Industry & Equipment Applications
- Automotive Manufacturing: Body shop welding lines, paint shop conveyor systems, and assembly robot cells where PROFIBUS DP networks span large distances across the plant.
- Chemical & Petrochemical Plants: Distributed control architectures where field devices are located far from the central control room, requiring reliable long-distance bus communication.
- Water & Wastewater Treatment: Pump stations and remote monitoring installations where electrical noise from large motors can disrupt unprotected bus segments.
- Power Generation & Utilities: Substation automation and turbine control systems requiring electrically isolated network segments for safety and reliability.
- Food & Beverage Processing: Hygienic production lines with variable-speed drives and remote I/O distributed across multiple zones.
- Material Handling & Logistics: Conveyor and sortation systems with PROFIBUS DP networks extending across large warehouse or distribution center footprints.
System Integration & Compatible Parts
The 6ES7972-0AA02-0XA0 is designed to integrate seamlessly within the Siemens SIMATIC S7-300 and broader PROFIBUS DP ecosystem. Compatible and commonly paired components include:
- SIMATIC S7-300 CPUs with integrated PROFIBUS DP interface (e.g., CPU 315-2 DP, CPU 317-2 DP)
- SIMATIC ET 200M, ET 200S, and ET 200pro distributed I/O stations
- PROFIBUS DP bus connectors (e.g., 6ES7972-0BA52-0XA0)
- PROFIBUS DP standard cable (e.g., 6XV1830-0EH10)
- SIMATIC S7-300 power supply modules (PS 307)
- Siemens SINAMICS and MICROMASTER drive series with PROFIBUS DP interface
Always verify compatibility against the official Siemens SIMATIC S7-300 system manual and the product’s hardware installation guide before system design.
Our Quality Assurance Process
At Konmask.com, every unit of the Siemens 6ES7972-0AA02-0XA0 undergoes a rigorous multi-stage quality verification process before shipment:
- Source Verification: All modules are sourced from authorized distributors or verified surplus channels with full traceability documentation.
- Visual Inspection: Each unit is inspected for physical integrity — housing condition, connector pins, label authenticity, and firmware version markings.
- Functional Testing: Where applicable, modules are bench-tested to confirm power-on behavior and basic communication readiness.
- Authenticity Check: Serial numbers and product markings are cross-referenced against Siemens product databases to detect counterfeit units.
- Secure Packaging: Units are packed in anti-static protective packaging with appropriate cushioning to prevent transit damage.
How to Order
- Submit an inquiry via our website contact form or email support@konmask.com with your required quantity and delivery timeline.
- Our technical sales team will respond within 1 business day with availability confirmation and a formal quotation.
- Upon PO receipt, we process and ship with full documentation including packing list and quality inspection report.
- Tracking information is provided upon dispatch; expedited shipping options are available on request.
For urgent requirements or large-volume orders, please contact us directly at +0086 19859288691.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on industrial control components — PLCs, DCS modules, drives, and network accessories — giving us deep product knowledge that generalist distributors cannot match.
- Global Sourcing Network: Our supplier relationships span authorized distributors and verified surplus channels across Asia, Europe, and North America, enabling us to source hard-to-find and obsolete parts.
- Technical Pre-Sales Support: Our engineering team can assist with compatibility verification, system design questions, and alternative part recommendations before you commit to a purchase.
- Competitive Lead Times: We maintain strategic stock positions on high-demand Siemens SIMATIC components to support urgent plant maintenance and MRO requirements.
- Transparent Documentation: Every shipment is accompanied by full traceability documentation, giving your procurement and quality teams the confidence they need.
Frequently Asked Questions
- Q: What is the maximum number of repeaters that can be cascaded in a PROFIBUS DP network?
- A: Siemens specifies a maximum of 9 repeaters in series on a single PROFIBUS DP network, allowing up to 10 segments. Always consult the official PROFIBUS DP network design guidelines for your specific topology.
- Q: Does the 6ES7972-0AA02-0XA0 require any software configuration?
- A: No. The repeater features automatic baud rate detection and requires no software configuration via STEP 7 or TIA Portal. It is a purely hardware device that operates transparently on the PROFIBUS DP bus.
- Q: Is this repeater compatible with PROFIBUS PA networks?
- A: No. The 6ES7972-0AA02-0XA0 is designed specifically for PROFIBUS DP (RS-485 physical layer). For PROFIBUS PA segments, a dedicated DP/PA coupler or link module is required.
- Q: Can Konmask.com provide a certificate of conformity or test report?
- A: Yes. Upon request, we can provide available quality documentation including inspection reports. Please specify your documentation requirements when submitting your inquiry.
- Q: What is the lead time for the 6ES7972-0AA02-0XA0?
- A: Lead time depends on current stock availability. Please contact us at support@konmask.com or +0086 19859288691 for a real-time availability check and delivery estimate.
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Contact: support@konmask.com | +0086 19859288691
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