Central CPUs, fail-safe CPUs, racks, and distributed-I/O control roles
Category hub / PLC / CPU
PLC and CPU references - identify, recover, replace
A PLC or CPU reference is only useful when it stays connected to its rack, firmware, safety role, and machine context. This hub starts with the reference itself, then records what is known before a source, repair, exchange, or replacement decision is made.
Catalogue references
537 catalogue references
537 catalogue references.
| Rank | Reference | Manufacturer | Type | System role | Evidence | Status | Action |
|---|---|---|---|---|---|---|---|
| 301 | 6ES7416-2XN05-0AB0 | Not stated | Not stated | The CPU processes the configured S7 control program for the S7-400 automation system. | Individual research | PUBLISHED | Open reference |
| 302 | 6ES7431-7QH00-0AB0 | Not stated | Not stated | The SM 431 receives analog field signals and makes their measured values available to the S7-400 controller. | Individual research | PUBLISHED | Open reference |
| 303 | 6ES7432-1HF00-0AB0 | Not stated | Not stated | The SM 432 converts controller output values into analog signals for downstream actuators or instruments. | Individual research | PUBLISHED | Open reference |
| 304 | 6ES7453-3AH00-0AE0 | Not stated | Not stated | The FM 453 controls positioning for up to three servo or stepper motor axes. | Individual research | PUBLISHED | Open reference |
| 305 | 6ES7456-2AA00-0AB0 | Not stated | Not stated | The FM456-2 processes application tasks within an M7-400 automation system. | Individual research | PUBLISHED | Open reference |
| 306 | 6ES7478-2AC00-0AC0 | Not stated | Not stated | The EXM478 routes expansion capacity for three M7-400 interface modules. | Individual research | PUBLISHED | Open reference |
| 307 | 6ES7510-1SJ01-0AB0 | Not stated | Not stated | The CPU processes standard and fail-safe control programs for an the documented distributed-I/O system distributed I/O station. | Individual research | PUBLISHED | Open reference |
| 308 | 6ES7511-1AK01-0AB0 | Not stated | Not stated | The CPU processes the S7-1500 control program and exchanges process data over its PROFINET interface. | Individual research | PUBLISHED | Open reference |
| 309 | 6ES7521-1BL00-0AB0 | Not stated | Not stated | Receives 32 channels of 24 V DC digital signals, with channels 0 and 1 optionally configured for counting. | Individual research | PUBLISHED | Open reference |
| 310 | 6ES7675-1DK40-2AP0 | Not stated | Not stated | Controls and hosts WinCC flexible 2008 and WinAC software and provides industrial PC communications through PROFIBUS DP and two 1 Gbit Ethernet ports. | Individual research | PUBLISHED | Open reference |
| 311 | 6ES7715-1BB24-0CA3 | Not stated | Not stated | Controls STEP 7 and WinCC engineering tasks and communicates with automation controllers through the documented MPI cable. | Individual research | PUBLISHED | Open reference |
| 312 | 6ES7715-1CC04-0AD3 | Not stated | Not stated | Controls engineering software access and communicates with both S5 and S7 automation systems through the documented S5, MPI and programming interfaces. | Individual research | PUBLISHED | Open reference |
| 313 | 6ES7716-1BA06-0AB1 | Not stated | Not stated | Controls STEP 7 and WinCC engineering tasks and communicates with automation controllers through the documented MPI cable. | Individual research | PUBLISHED | Open reference |
| 314 | 6ES7716-2BA16-0BB4 | Not stated | Not stated | Controls engineering workstation tasks and communicates with automation controllers through the documented MPI cable. | Individual research | PUBLISHED | Open reference |
| 315 | 6ES7716-2BA16-0CB2 | Not stated | Not stated | Controls engineering workstation tasks and communicates with automation controllers through the documented MPI cable. | Individual research | PUBLISHED | Open reference |
| 316 | 6ES7717-1BB01-0AC2 | Not stated | Not stated | Controls STEP 7 and WinCC engineering tasks and communicates with automation controllers through its documented programming connection. | Individual research | PUBLISHED | Open reference |
| 317 | 6ES7720-2AB10-0YB0 | Not stated | Not stated | Controls legacy STEP 5, STEP 7 and Micro DOS engineering tools for programming and diagnosing automation controllers. | Individual research | PUBLISHED | Open reference |
| 318 | 6ES7833-1CC46-0YA5 | Not stated | Not stated | Controls access to S7 F Systems V6.4 engineering software used to configure and program fail-safe S7 F and S7 FH systems. | Individual research | PUBLISHED | Open reference |
| 319 | 6ES7840-0WD21-0YD0 | Not stated | Not stated | Controls the licensed Maintenance Station 2009 runtime capacity for 500 additional monitored devices in the documented Siemens automation environments. | Individual research | PUBLISHED | Open reference |
| 320 | 6ES7840-0WD31-0YD0 | Not stated | Not stated | Controls the licensed Maintenance Station 2009 runtime capacity for 1000 additional monitored devices in the documented Siemens automation environments. | Individual research | PUBLISHED | Open reference |
| 321 | 6ES7954-8LF04-0AA0 | Not stated | Not stated | Supplies removable Flash memory for S7-1x00 CPU or SINAMICS program and configuration storage. | Individual research | PUBLISHED | Open reference |
| 322 | 6ES7954-8LL04-0AA0 | Not stated | Not stated | Supplies removable Flash memory for S7-1x00 CPU program and configuration storage. | Individual research | PUBLISHED | Open reference |
| 323 | 6ES7954-8LP01-0AA0 | Not stated | Not stated | Supplies removable Flash-EPROM storage for S7-1x00 CPU program and configuration data. | Individual research | PUBLISHED | Open reference |
| 324 | 6ES7972-0AB01-0XA0 | Not stated | Not stated | Monitors and regenerates PROFIBUS-DP communication segments and provides online cable diagnostics for the connected bus. | Individual research | PUBLISHED | Open reference |
| 325 | 6EW1810-3AA | Not stated | Not stated | Supplies electrical power to its associated Siemens automation assembly. | Individual research | PUBLISHED | Open reference |
| 326 | 6EW1860-3AA | Not stated | Not stated | Regulates the +5 V supply rail for connected Siemens NC electronics. | Individual research | PUBLISHED | Open reference |
| 327 | 6EW1861-3BA | Not stated | Not stated | Supplies power to the operator panel fan and monitor in the documented older SINUMERIK 850 and 880 installation. | Individual research | PUBLISHED | Open reference |
| 328 | 6FC5211-0BA01-0AA4 | Not stated | Not stated | ADI4 intervenes between the SINUMERIK control and up to four analog drive axes over the documented PROFIBUS DP system. | Individual research | PUBLISHED | Open reference |
| 329 | 6FC5222-0AA00-0AA1 | Not stated | Not stated | Connects two handwheels, two probes and four high-speed CNC input and output channels to the SINUMERIK control hardware. | Individual research | PUBLISHED | Open reference |
| 330 | 6FC5250-6BY30-5AH0 | Not stated | Not stated | Provides the documented 12-axis NCU system software layer for compatible SINUMERIK control hardware. | Individual research | PUBLISHED | Open reference |
| 331 | 6FC5313-5AG00-0AA2 | Not stated | Not stated | Sits within the SINUMERIK control's removable storage path | Individual research | PUBLISHED | Open reference |
| 332 | 6FC5356-0BB11-0AE1 | Not stated | Not stated | Acts as the SINUMERIK 840D CPU between control programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 333 | 6FC5356-0BB15-0AA0 | Not stated | Not stated | Acts as the SINUMERIK 840D CPU between control programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 334 | 6FC5357-0BB11-0AE0 | Not stated | Not stated | Acts as the SINUMERIK 840D CPU between control programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 335 | 6FC5357-0BB12-0AE0 | Not stated | Not stated | Acts as the SINUMERIK 840D CPU between control programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 336 | 6FC5357-0BB13-0AA1 | Not stated | Not stated | Acts as the SINUMERIK 840D CPU between control programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 337 | 6FC5357-0BB15-0AB0 | Not stated | Not stated | Acts as the SINUMERIK 840D/DE control point between CNC programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 338 | 6FC5357-0BB34-0AA0 | Not stated | Not stated | Acts as the SINUMERIK 840D CPU between control programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 339 | 6FC5357-0BY21-1AE1 | Not stated | Not stated | Acts as the SINUMERIK 840D CPU between control programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 340 | 6FC5372-0AA00-0AA2 | Not stated | Not stated | Acts as the SINUMERIK 840D sl control point between CNC programs and connected machine subsystems | Individual research | PUBLISHED | Open reference |
| 341 | 6FC5372-0AA01-0AA2 | Not stated | Not stated | Acts as the SINUMERIK 840D sl control point between CNC programs and PROFINET/PROFIBUS machine subsystems | Individual research | PUBLISHED | Open reference |
| 342 | 6FC5611-0CA01-0AA1 | Not stated | Not stated | Transmits Industrial Ethernet data between the host PCI bus and the connected automation network. | Individual research | PUBLISHED | Open reference |
| 343 | 6GK1143-0AA01 | Not stated | Not stated | Routes SIMATIC S5 controller data through the CP 143 TF SINEC H1 Ethernet interface. | Individual research | PUBLISHED | Open reference |
| 344 | 6GK1161-3AA01 | Not stated | Not stated | Transmits Industrial Ethernet data through the CP 1613 A2 PCI interface. | Individual research | PUBLISHED | Open reference |
| 345 | 6GK1162-3AA00 | Not stated | Not stated | Transmits Industrial Ethernet data through the CP 1623 two-port RJ45 switch. | Individual research | PUBLISHED | Open reference |
| 346 | 6GK1415-2BA20 | Not stated | Not stated | Routes AS-i field-device data into the PROFIBUS DP controller network. | Individual research | PUBLISHED | Open reference |
| 347 | 6GK1503-2CC00 | Not stated | Not stated | Converts PROFIBUS communication into the documented optical-link path. | Individual research | PUBLISHED | Open reference |
| 348 | 6GK1503-3CA00 | Not stated | Not stated | Converts PROFIBUS traffic between the RS485 interface and plastic-fiber optical links. | Individual research | PUBLISHED | Open reference |
| 349 | 6GK1503-3CA01 | Not stated | Not stated | Converts PROFIBUS traffic between the RS-485 interface and plastic-fiber optical links. | Individual research | PUBLISHED | Open reference |
| 350 | 6GK1503-3CB00 | Not stated | Not stated | Converts PROFIBUS traffic between the RS-485 interface and glass-fiber optical links. | Individual research | PUBLISHED | Open reference |
What this category covers
Reference identity, successor checks, firmware and network context
Evidence needed before repair, exchange, or a compatible replacement
Integration status: 16 catalogue identities integrated; identity pages are indexable and optional evidence is omitted when unavailable
Choose a recovery path
Editorial queue
9 draft / 1 published
Published guides passed the shared evidence evaluator. Draft entries remain noindex until their body, sources, review window, provenance, and category path pass the same gates.
| Intent | Question | Summary | Source notes | Integration | Preview |
|---|---|---|---|---|---|
| How to identify a PLC CPU from its nameplate | Which nameplate fields prove a PLC CPU identity? | A practical intake sequence for the reference, revision, family, and visible condition. | docs/data/v1-guide-publication-review.md; Siemens SIMATIC S7-1200 system manual V4.5: https://cache.industry.siemens.com/dl/files/241/109797241/att_1066673/v1/s71200_system_manual_en-US_en-US.pdf; Siemens 6ES7214-1AG40-0XB0 product data: https://mall.industry.siemens.com/goos/catalog/Pages/mmpdata.ashx?MLFB1=6ES7214-1AG40-0XB0&lang=en; Siemens 6ES7214-1BG40-0XB0 product data: https://mall.industry.siemens.com/goos/catalog/Pages/mmpdata.ashx?MLFB1=6ES7214-1BG40-0XB0&lang=en | PUBLISHED - INDEXABLE | Open published guide |
| PLC CPU or I/O module: what is the difference? | How can a technician tell the controller from an I/O module? | Explain the control role and the evidence that separates a CPU from its connected modules. | docs/data/data-model.md; Manufacturer documentation required before publication | DRAFT - NOT INDEXABLE | Open draft |
| What to record before recovering a fail-safe PLC CPU | What safety and configuration evidence is needed before recovery? | Define a safe intake boundary for a fail-safe controller without promising compatibility. | docs/product/comparison-and-recovery-model.md; Qualified technical evidence required | DRAFT - NOT INDEXABLE | Open draft |
| How to check a PLC CPU successor reference | What must be compared before accepting a successor? | A comparison checklist for hardware, firmware, safety, wiring, and project constraints. | docs/data/data-model.md; Manufacturer documentation required before publication | DRAFT - NOT INDEXABLE | Open draft |
| Why network context matters for a PLC CPU | Which network details affect a CPU replacement? | Show why a part number alone cannot confirm a drop-in replacement in a control network. | docs/product/comparison-and-recovery-model.md; Qualified technical evidence required | DRAFT - NOT INDEXABLE | Open draft |
| Planning around an obsolete PLC CPU | What should be documented when a PLC CPU is obsolete? | Separate evidence gathering, machine risk, sourcing, and migration decisions. | docs/data/data-management.md; Current manufacturer status required | DRAFT - NOT INDEXABLE | Open draft |
| PLC repair or replacement: which evidence helps? | When is repair evidence more useful than a replacement quote? | Frame the recovery decision around symptoms, downtime, configuration, and available evidence. | docs/product/comparison-and-recovery-model.md; Repair capability evidence required | DRAFT - NOT INDEXABLE | Open draft |
| A control-cabinet checklist for PLC identification | What should be photographed during a PLC cabinet audit? | List the cabinet and machine context that makes a reference request actionable. | /how-it-works/#request-checklist; Technical evidence required | DRAFT - NOT INDEXABLE | Open draft |
| PLC reference aliases and formatting | Why do the same PLC references appear in different formats? | Document normalization without treating an alias as proof of product identity. | docs/data/data-model.md; Source evidence required | DRAFT - NOT INDEXABLE | Open draft |
| What evidence to send with a PLC request | Which files and photos make a PLC request useful? | A short evidence pack for reference, symptom, machine, and desired recovery route. | /how-it-works/#request-checklist; Ardkor intake policy | DRAFT - NOT INDEXABLE | Open draft |
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