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 |
|---|---|---|---|---|---|---|---|
| 201 | 6ES7138-4FB04-0AB0 | Not stated | Not stated | Controls fail-safe 24 V DC field outputs from a distributed safety I/O station. | Individual research | PUBLISHED | Open reference |
| 202 | 6ES7138-7EA01-0AA0 | Not stated | Not stated | Supplies 24 V DC power to the distributed I/O station in the documented hazardous-area system. | Individual research | PUBLISHED | Open reference |
| 203 | 6ES7141-1BF01-0XB0 | Not stated | Not stated | Receives eight 24 V DC field input signals and forwards them through the distributed I/O station PROFIBUS-DP station. | Individual research | PUBLISHED | Open reference |
| 204 | 6ES7141-1BF11-0XB0 | Not stated | Not stated | Receives eight 24 V DC field input signals and forwards them through the distributed I/O station PROFIBUS-DP station. | Individual research | PUBLISHED | Open reference |
| 205 | 6ES7141-1BF12-0XB0 | Not stated | Not stated | Receives eight 24 V DC field input signals and forwards them through the distributed I/O station PROFIBUS-DP station. | Individual research | PUBLISHED | Open reference |
| 206 | 6ES7141-1BF31-0XA0 | Not stated | Not stated | Receives eight 24 V DC field input signals and adds them to a distributed I/O station basic module. | Individual research | PUBLISHED | Open reference |
| 207 | 6ES7142-1BD11-0XB0 | Not stated | Not stated | Controls four 24 V DC loads at up to 2 A per output from a distributed I/O station. | Individual research | PUBLISHED | Open reference |
| 208 | 6ES7142-1BD21-0XB0 | Not stated | Not stated | Controls four 24 V DC loads at up to 2 A per output from a distributed I/O station. | Individual research | PUBLISHED | Open reference |
| 209 | 6ES7142-1BD22-0XB0 | Not stated | Not stated | Switches four documented 24 V DC digital outputs in the documented field-I/O station. | Individual research | PUBLISHED | Open reference |
| 210 | 6ES7143-1BF00-0AB0 | Not stated | Not stated | Routes configurable digital input/output signals through the documented BM143/DESINA RS485 base module. | Individual research | PUBLISHED | Open reference |
| 211 | 6ES7143-1BF00-0XB0 | Not stated | Not stated | Routes configurable digital input/output signals through the documented BM143/DESINA fiber-optic base module. | Individual research | PUBLISHED | Open reference |
| 212 | 6ES7144-1FB31-0XB0 | Not stated | Not stated | Measures two voltage signals through the documented EM144 analog-input expansion module. | Individual research | PUBLISHED | Open reference |
| 213 | 6ES7148-1CA00-0XB0 | Not stated | Not stated | Supplies load power for four documented digital outputs through the PM148 power module. | Individual research | PUBLISHED | Open reference |
| 214 | 6ES7148-1EH11-0XA0 | Not stated | Not stated | Controls up to 16 pneumatic valve outputs through the documented EM148-P interface. | Individual research | PUBLISHED | Open reference |
| 215 | 6ES7151-1AB05-0AB0 | Not stated | Not stated | Routes distributed-I/O data over the PROFIBUS DP fiber-optic interface. | Individual research | PUBLISHED | Open reference |
| 216 | 6ES7151-7FA20-0AB0 | Not stated | Not stated | Controls standard and safety programs for a distributed-I/O station through the IM151-7 F-CPU. | Individual research | PUBLISHED | Open reference |
| 217 | 6ES7151-8AB01-0AB0 | Not stated | Not stated | Controls distributed I/O with its integrated CPU and PROFINET interface. | Individual research | PUBLISHED | Open reference |
| 218 | 6ES7153-2AR03-0XA0 | Not stated | Not stated | Supplies redundant distributed-I/O interface modules for a PROFIBUS DP distributed-I/O station. | Individual research | PUBLISHED | Open reference |
| 219 | 6ES7153-2AR03-0XA5 | Not stated | Not stated | Routes the documented redundant distributed-I/O interface kit onto a PROFIBUS DP fieldbus. | Individual research | PUBLISHED | Open reference |
| 220 | 6ES7153-2BB00-0XB0 | Not stated | Not stated | Routes distributed-I/O data over a redundant PROFIBUS DP fiber-optic interface. | Individual research | PUBLISHED | Open reference |
| 221 | 6ES7154-3AB00-0AB0 | Not stated | Not stated | Routes distributed I/O to a PROFINET IO network through its integrated switch. | Individual research | PUBLISHED | Open reference |
| 222 | 6ES7155-6AA01-0BN0 | Not stated | Not stated | Routes a distributed-I/O station onto PROFINET with the bundled IM155-6PN ST interface. | Individual research | PUBLISHED | Open reference |
| 223 | 6ES7155-6AU01-0BN0 | Not stated | Not stated | Routes distributed I/O to PROFINET through the IM155-6PN ST interface module. | Individual research | PUBLISHED | Open reference |
| 224 | 6ES7155-6BU00-0CN0 | Not stated | Not stated | Routes distributed I/O to a PROFIBUS DP network through the IM155-6DP HF interface. | Individual research | PUBLISHED | Open reference |
| 225 | 6ES7214-1AD22-0XB0 | Not stated | Not stated | Controls compact S7-200 machine logic with 14 DC inputs, 10 DC outputs, and PROFIBUS DP expansion. | Individual research | PUBLISHED | Open reference |
| 226 | 6ES7214-1AF40-0XB0 | Not stated | Not stated | Controls fail-safe and standard automation logic with the S7-1200F CPU 1214FC. | Individual research | PUBLISHED | Open reference |
| 227 | 6ES7214-1BD23-0XB0 | Not stated | Not stated | Controls compact S7-200 machine logic with 14 DC inputs, 10 relay outputs, and PROFIBUS DP expansion. | Individual research | PUBLISHED | Open reference |
| 228 | 6ES7214-2AD23-0XB0 | Not stated | Not stated | Controls S7-200 machine logic with 14 DC inputs, 10 transistor outputs, analog I/O, and two PPI/Freeport ports. | Individual research | PUBLISHED | Open reference |
| 229 | 6ES7214-2BD23-0XB0 | Not stated | Not stated | Controls the documented S7-200 machine sequence using its integrated I/O and communication ports. | Individual research | PUBLISHED | Open reference |
| 230 | 6ES7216-2BD00-0XB0 | Not stated | Not stated | Controls the documented S7-200 machine sequence using its integrated I/O and communication ports. | Individual research | PUBLISHED | Open reference |
| 231 | 6ES7221-1BF32-0XB0 | Not stated | Not stated | Receives documented field signals and presents their states to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 232 | 6ES7221-3AD30-0XB0 | Not stated | Not stated | Receives documented field signals and presents their states to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 233 | 6ES7222-1AD30-0XB0 | Not stated | Not stated | Switches controller commands to digital loads in the SIMATIC S7-1200 system. | Individual research | PUBLISHED | Open reference |
| 234 | 6ES7222-1BH32-0XB0 | Not stated | Not stated | Switches controller commands to digital loads in the SIMATIC S7-1200 system. | Individual research | PUBLISHED | Open reference |
| 235 | 6ES7222-1XF32-0XB0 | Not stated | Not stated | Switches controller commands to digital loads in the SIMATIC S7-1200 system. | Individual research | PUBLISHED | Open reference |
| 236 | 6ES7223-1BL32-0XB0 | Not stated | Not stated | Receives 24 V DC field signals on 16 digital inputs and switches 24 V DC loads through 16 sourcing MOSFET outputs. | Individual research | PUBLISHED | Open reference |
| 237 | 6ES7223-1BL32-1XB0 | Not stated | Not stated | Receives digital field signals and switches digital loads in the documented SIMATIC controller system. | Individual research | PUBLISHED | Open reference |
| 238 | 6ES7223-1PL22-0XA0 | Not stated | Not stated | Receives digital field signals and switches digital loads in the documented SIMATIC controller system. | Individual research | PUBLISHED | Open reference |
| 239 | 6ES7223-1QH32-0XB0 | Not stated | Not stated | Receives digital field signals and switches digital loads in the documented SIMATIC controller system. | Individual research | PUBLISHED | Open reference |
| 240 | 6ES7223-3AD30-0XB0 | Not stated | Not stated | Receives digital field signals and switches digital loads in the documented SIMATIC controller system. | Individual research | PUBLISHED | Open reference |
| 241 | 6ES7223-3BD30-0XB0 | Not stated | Not stated | Receives digital field signals and switches digital loads in the documented SIMATIC controller system. | Individual research | PUBLISHED | Open reference |
| 242 | 6ES7226-6BA32-0XB0 | Not stated | Not stated | Receives documented field signals and presents their states to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 243 | 6ES7231-4HA30-0XB0 | Not stated | Not stated | Measures documented analog sensor signals and presents their values to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 244 | 6ES7231-5ND32-0XB0 | Not stated | Not stated | Measures documented analog sensor signals and presents their values to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 245 | 6ES7231-5PA30-0XB0 | Not stated | Not stated | Measures documented analog sensor signals and presents their values to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 246 | 6ES7231-5PF30-0XB0 | Not stated | Not stated | Measures documented analog sensor signals and presents their values to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 247 | 6ES7231-5PF32-0XB0 | Not stated | Not stated | Measures documented analog sensor signals and presents their values to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 248 | 6ES7231-5QA30-0XB0 | Not stated | Not stated | Measures documented analog sensor signals and presents their values to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 249 | 6ES7231-5QF32-0XB0 | Not stated | Not stated | Measures documented analog sensor signals and presents their values to the SIMATIC S7-1200 controller. | Individual research | PUBLISHED | Open reference |
| 250 | 6ES7231-7PD22-0XA0 | Not stated | Not stated | Receives thermocouple signals from field temperature sensors and makes four analog measurements available to an S7-22X CPU. | 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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