PLC / PAC & Safety Controller Manufacturers
Programmable logic and automation controllers, including the safety-controller specialists.
Curated list of major and notable vendors — absence means nothing, and inclusion is not endorsement. Ownership, branding, and availability change; confirm with the manufacturer. See the directory notice.
Vendors
| Manufacturer | Region | Notable families | Typical protocols | Notes |
|---|---|---|---|---|
| ABB | Europe | AC500 | — | full-line automation supplier |
| AutomationDirect | — | Productivity, BRX, CLICK, Do-more | Modbus RTU, Modbus TCP | — |
| B&R Industrial Automation | — | X20, Automation PC | POWERLINK | — |
| Beckhoff Automation | Europe | TwinCAT PLC, industrial PCs | EtherCAT | PC-based control |
| Bihl+Wiedemann | — | — | AS-Interface | safety controllers |
| Bosch Rexroth | Europe | ctrlX CORE, IndraControl | EtherCAT, Sercos | — |
| Delta Electronics | Taiwan | DVP, AS, AH | Modbus RTU, Modbus TCP | — |
| Eaton | — | easyE4, XC | — | — |
| Emerson | North America | PACSystems, DeltaV controllers | — | — |
| HIMA | — | HIMax, HIMatrix | — | safety controllers |
| Honeywell | North America | ControlEdge PLC | — | — |
| IDEC | — | MicroSmart | — | — |
| Keyence | — | KV | — | — |
| Mitsubishi Electric | Japan | MELSEC iQ-R, iQ-F, Q, L, FX | CC-Link, CC-Link IE | — |
| Omron | Japan | NX, NJ, CJ, CP | EtherCAT, EtherNet/IP | — |
| Panasonic Industry | Japan | FP | — | — |
| Phoenix Contact | — | PLCnext Control | PROFINET | — |
| Pilz | — | — | — | safety controllers |
| Rockwell Automation / Allen-Bradley | North America | ControlLogix, CompactLogix, Micro800 | EtherNet/IP | GuardLogix safety platform |
| Schneider Electric | Europe | Modicon M221, M241, M251, M262, M340, M580 | Modbus TCP, EtherNet/IP | — |
| SICK | — | — | — | safety controllers |
| Siemens | Europe | SIMATIC S7-1200, S7-1500, ET 200 CPUs | PROFINET, PROFIBUS | SIMATIC Safety option |
| WAGO | — | PFC, Compact Controller | — | — |
| Wieland Electric | — | — | — | safety controllers |
| Yokogawa | Japan | FA-M3, process controllers | — | — |
Selection Notes
Selection notes specific to controllers:
- Ecosystem lock-in is real. The controller choice usually decides the engineering software, HMI pairing, preferred network, and the skill set you hire for. Weigh the ecosystem, not the CPU datasheet.
- Safety-rated variants (e.g. safety PLCs) need certification evidence for the claimed PL/SIL — see ISO 13849-1 and IEC 62061.
- Lifecycle status matters more than features — controllers live 15–25 years in service; check the vendor’s active/mature/end-of-life designation.
This site is an independent educational reference for industrial automation standards. It paraphrases and organizes guidance in original language; it is not a substitute for the official published standards, professional engineering judgment, or legal review, and content has not been independently verified against current published editions.
Items marked Review pending await technical review against the identified edition. Items marked Planned have no reviewed source material behind them. Do not rely on this site for compliance determinations, safety-critical design decisions, or legal interpretation.