6ES7972-0AA02-0XA0 - SIMATIC RS485 PROFIBUS Repeater | Siemens
N.º da peça: 6ES7972-0AA02-0XA0 ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $485 | $485,00 |
| 10 | $460 | $4.600,00 |
| 100 | $425 | $42.500,00 |
| 500 | $395 | $197.500,00 |
| 1.000 | $370 | $370.000,00 |
6ES7972-0AA02-0XA0 Visão geral
A PROFIBUS RS485 repeater is a physical-layer network component that regenerates and retimes the differential RS-485 waveform between two bus segments. Within the SIMATIC automation hierarchy, repeaters sit at the fieldbus layer below PROFINET/Industrial Ethernet and above the sensor/actuator level, allowing engineers to extend cable runs, isolate galvanically separated segments, and increase the number of connected nodes beyond the 32-device limit of a single RS-485 segment. Repeaters are transparent to PROFIBUS DP and MPI protocols and do not require configuration, making them a plug-and-play infrastructure element for greenfield and brownfield installations.
Key features include support for data rates from 9.6 kbit/s up to 12 Mbit/s (auto-detected), galvanic isolation between the two RS-485 segments, diagnostic LEDs for segment status, screw-type terminal connections, and a rugged housing rated for industrial control cabinet mounting. The IP20 rating indicates finger-safe protection but requires installation inside a closed cabinet. The repeater is spare-parts-compatible with the previous 6ES7972-0AA01-0XA0 variant, meaning existing cabling can be reused when upgrading.
Typical applications include PROFIBUS DP network segmentation in factory automation, MPI bus extension for SIMATIC S7-300/400 PLC systems, building automation networks, process industry installations, and any industrial environment requiring physical-layer extension beyond the 32-node or cable-length limits of a single RS-485 segment. The repeater is widely deployed in automotive manufacturing, water/wastewater treatment, and material-handling systems.
When designing with this repeater, observe the maximum of 31 nodes per segment, ensure the termination resistors are enabled only at segment ends, and place the repeater near the segment boundary to minimize stub length. Note that per Siemens product phase-out announcement PM400 (1 October 2024), this part is approaching end-of-life with PM410 cancellation effective 1 October 2027; design new projects with the latest SIMATIC repeater family where possible.
Alternativas drop-in para 6ES7972-0AA02-0XA0 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
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6ES7972-0AA01-0XA0
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6ES7972-0AB01-0XA0
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6ES7972-0DA00-0AA0
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6ES7972-0AA02-0XA0 Especificações (publicadas pelo fabricante)
| Product Type | RS485 Repeater Module |
| Series | SIMATIC DP |
| Bus Protocol | PROFIBUS / MPI |
| Maximum Nodes per Segment | 31 |
| Maximum Baud Rate | 12 Mbit/s |
| Minimum Baud Rate | 9.6 kbit/s |
| Tensão de alimentação | 20.4 V to 28.8 V DC |
| Degree of Protection | IP20 |
| Tipo de montagem | DIN Rail |
| Electrical Isolation | Between segments |
| Segment Interfaces | 2 x RS485 (PROFIBUS) |
| Termination | Switchable, integral |
| Compliance | CE, UL listed (per Siemens product page) |
| Spare-Parts Compatibility | Backwards compatible with 6ES7972-0AA01-0XA0 |
| Diagnostic LEDs | Segment status indicators |
Interfaces e Conectores do 6ES7972-0AA02-0XA0
6ES7972-0AA02-0XA0 expõe as seguintes interfaces e conectores conforme publicado pelo fabricante: Entrada de Potência. A pinagem do header de expansão, a numeração dos pinos do conector e os limites elétricos estão definidos na documentação do fabricante.
| Entrada de Potência | 20.4 V to 28.8 V DC |
Consulte a documentação do fabricante para a pinagem completa do conector de expansão e a numeração dos pinos do conector.
Características de potência e térmicas
| Entrada de Potência | 20.4 V to 28.8 V DC |
Parâmetros de entrada de potência e térmicos para 6ES7972-0AA02-0XA0, conforme publicados pelo fabricante.
Aplicações típicas
6ES7972-0AA02-0XA0 é adequado para 6 aplicaçãos: PROFIBUS DP Network Segmentation in Factory Automation, MPI Bus Extension for S7-300/400 Programming and HMI, Automotive Manufacturing Line PROFIBUS Backbone, Water and Wastewater Treatment Plant SCADA Networks, Material Handling and Conveyor System PROFIBUS Extension, Building Automation and HVAC PROFIBUS Networks.
PROFIBUS DP Network Segmentation in Factory Automation
The Siemens 6ES7972-0AA02-0XA0 is purpose-built for PROFIBUS DP network segmentation in discrete and process-factory environments. Its RS-485 repeater function regenerates the differential bus signal between two galvanically isolated segments, allowing the network to exceed the 32-node single-segment limit and the maximum cable length defined by the PROFIBUS baud rate (for example, 100 m at 12 Mbit/s, 1200 m at 9.6 kbit/s). Each segment can host up to 31 nodes per the datasheet. The 20.4-28.8 V DC supply and IP20 housing make it ideal for DIN-rail mounting inside control cabinets alongside ET 200 I/O and S7-300/400 CPUs.
Recomendado
MPI Bus Extension for S7-300/400 Programming and HMI
The 6ES7972-0AA02-0XA0 transparently regenerates MPI (Multi-Point Interface) traffic, making it suitable for extending the programming and HMI bus between SIMATIC S7-300/400 PLCs and operator panels. MPI operates at 187.5 kbit/s or 1.5 Mbit/s, both of which fall inside the repeater's 9.6 kbit/s to 12 Mbit/s auto-detect range. By placing the repeater between the CPU port and a remote HMI panel or programming device, designers can overcome the 50 m MPI cable limit and isolate ground loops between cabinets. No STEP 7 configuration is required since the repeater is protocol-transparent.
Recomendado
Automotive Manufacturing Line PROFIBUS Backbone
Automotive body-in-white and final-assembly lines deploy the 6ES7972-0AA02-0XA0 to segment PROFIBUS DP backbones that span long transfer lines and welding cells. With 12 Mbit/s support, the repeater handles real-time I/O traffic for robot controllers, vision systems, and RFID readers; its galvanic isolation between segments prevents ground potential differences between cells from causing communication faults. The DIN-rail form factor and 24 V industrial supply voltage integrate seamlessly into the cell-control cabinets typical of automotive plants.
Recomendado
Water and Wastewater Treatment Plant SCADA Networks
In water and wastewater treatment plants, the 6ES7972-0AA02-0XA0 extends PROFIBUS DP networks that link remote pump stations, flow meters, and chemical-dosing skids back to a central S7-300 SCADA PLC. Long cable runs across plant yards are typical, so segmenting the bus with the repeater allows engineers to exceed the 1.2 km 9.6 kbit/s limit by chaining repeaters. The IP20 enclosure requires installation inside a panel, which suits pump-station control kiosks. Repeaters also provide isolation that protects against ground potentials in outdoor cabling.
Recomendado
Material Handling and Conveyor System PROFIBUS Extension
Parcel-sortation hubs and large conveyor systems use the 6ES7972-0AA02-0XA0 to bridge long PROFIBUS DP trunks between sortation controllers and remote I/O drops. The repeater's 12 Mbit/s capability supports high-speed sorting control loops, while its segment isolation prevents a single short-circuit or EMC event from taking down the entire conveyor network. With up to 31 nodes per segment, multiple VFDs, photo-eyes, and diverters can share one segment before requiring another repeater.
Recomendado
Building Automation and HVAC PROFIBUS Networks
Large commercial buildings and central plants deploy the 6ES7972-0AA02-0XA0 to extend PROFIBUS networks that link HVAC controllers, variable air volume boxes, and chiller controls. Repeaters extend cable runs between mechanical rooms and overcome the 32-node segment ceiling typical in multi-floor installations. The 24 V DC input allows the repeater to share the same back-up-power system used by the S7-300 controllers, while the IP20 rating fits within mechanical-room control panels. Pair with Siemens FLN devices for a unified building-automation backbone.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para 6ES7972-0AA02-0XA0 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 6ES7972-0AA01-0XA0 | 6ES7972-0AB01-0XA0 | 6ES7972-0DA00-0AA0 |
|---|---|---|---|---|
| Brand | Siemens | Siemens | Siemens | Siemens |
| Package | SIMATIC DP DIN-rail module | SIMATIC DP DIN-rail module - same | SIMATIC DP DIN-rail module - same | SIMATIC DP DIN-rail module - same |
| Product Type | Standard PROFIBUS RS485 repeater | Standard PROFIBUS RS485 repeater (legacy) | Diagnostic PROFIBUS RS485 repeater | Active PROFIBUS terminating resistor |
| Maximum Baud Rate | 12 Mbit/s | 12 Mbit/s | 12 Mbit/s | 12 Mbit/s (terminator only) |
| Maximum Nodes per Segment | 31 | 31 | 31 | N/A (terminator) |
| Supply Voltage | 20.4 V to 28.8 V DC | 20.4 V to 28.8 V DC | 20.4 V to 28.8 V DC | Powered from bus (terminator) |
| Degree of Protection | IP20 | IP20 | IP20 | IP20 |
| Diagnostic LEDs | Segment status | Segment status (basic) | Per-segment signal-quality diagnostics | None |
| Lifecycle Status | PM400 announced 2024-10-01; PM410 effective 2027-10-01 | Already cancelled | PM400 announced 2024-10-01; PM410 effective 2027-10-01 | PM400 announced 2024-10-01; PM410 effective 2027-10-01 |
Principais diferenciais
- Spare-parts-compatible with legacy 6ES7972-0AA01-0XA0 installations (vs 6ES7972-0AA01-0XA0)
- Standard (non-diagnostic) repeater for cost-sensitive segments (vs 6ES7972-0AB01-0XA0)
- Drop-in replacement that requires no STEP 7 configuration (vs 6ES7972-0DA00-0AA0)
Notas de projeto
Enable the integral termination resistors ONLY at the physical ends of each PROFIBUS segment. Repeaters and intermediate nodes must have termination switched OFF, or the bus will be over-terminated and signal amplitude will drop, causing intermittent communication faults. Per the Siemens manual, the 6ES7972-0AA02-0XA0 ships with termination OFF and the user must enable it explicitly when the repeater sits at a segment end.
Keep stub length between the repeater's terminal and the trunk cable under 1 m at 12 Mbit/s to avoid signal reflections. Place the repeater as close as practical to the segment boundary, use PROFIBUS-certified purple cable, and route at least 200 mm away from VFD power cables to minimize EMC coupling. The repeater's IP20 rating requires installation inside a closed control cabinet, never in a free-air or outdoor location.
Power the 6ES7972-0AA02-0XA0 from a regulated 24 V DC industrial supply capable of at least 200 mA per repeater. Use a common power bus with the S7-300 CPU so that power cycling synchronizes; do not back-power through the PROFIBUS connector. Provide external fusing per local electrical code and observe Siemens' grounding recommendations: a single bonding point per cabinet and a ground conductor of at least 2.5 mm² to the repeater's PE terminal.
Informações de conformidade
RoHS and REACH compliance per Siemens product page; CE and UL listed per Siemens datasheet. AEC-Q100 not relevant for industrial PROFIBUS repeaters (non-automotive-qualified).