

The Siemens SIMATIC S7-300 CPU 312, identified by the order number 6ES7312-1AE13-0AB0, is a compact yet powerful central processing unit designed for demanding automation applications in industries such as chemical processing, electronics manufacturing, and general machine control. This CPU delivers exceptional performance with a balance of speed, memory, and communication capabilities, making it an ideal choice for both standalone and distributed control systems. It features a single MPI interface for programming and data exchange, and it requires a MultiMediaCard (MMC) for load memory, ensuring secure and reliable program storage. The unit is engineered for long service life and easy integration into existing S7-300 racks, providing a cost-effective solution for mid-range control tasks.
| Category | Specification |
|---|---|
| Product Type | Central Processing Unit (CPU) |
| Model | CPU 312 |
| Order Number | 6ES7312-1AE13-0AB0 |
| Series | SIMATIC S7-300 |
| Integrated Interfaces | 1 x MPI (Multi-Point Interface) |
| Power Supply Voltage | 24 V DC (19.2 V to 28.8 V) |
| Power Protection | External fuse recommended for power supply cable |
| Working Memory | 32 KB RAM |
| Load Memory (MMC) | Up to 8 MB via MultiMediaCard |
| Retentive Memory | 32 KB for data blocks |
| Bit Operation Time | 0.1 µs |
| Word Operation Time | 0.24 µs |
| Fixed-Point Arithmetic Time | 0.32 µs |
| Floating-Point Arithmetic Time | 1.1 µs |
| Max. Data Blocks (DBs) | 1024 |
| Max. Function Blocks (FBs) & Functions (FCs) | 1024 each, max. 32 KB per block |
| Organization Blocks (OBs) | OB1, OB10, OB20, OB21, OB32, OB33, OB34, OB35, OB40, OB80, OB82, OB85, OB87, OB100, OB121, OB122 |
| S7 Counters | Unlimited (limited by RAM), retentive |
| S7 Timers | Unlimited (limited by RAM), retentive |
| Programming Software | STEP 7 V5.5 + SP1 or later; STEP 7 V5.2 + SP1 or later (with HSP 218) |
| Operating Temperature | 0 °C to 60 °C (typical industrial range) |
| Storage Temperature | -40 °C to 70 °C |
| Dimensions (W x H x D) | Approx. 40 mm x 125 mm x 130 mm |
| Weight | Approx. 200 g |
| Application Areas | Chemical, electronics, electrical, and general manufacturing automation |

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