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This central controller executes logic and manages I/O for SIMATIC S5 systems. It processes user programs at high speed with minimal latency. You can expand its capacity using standard I/O modules easily.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand | Siemens |
| Model | Siemens 6ES5105-3RA11 |
| Category | Central Controller (SIMATIC S5 Series) |
| Dimensions (H x W x D) | 250 mm x 85 mm x 210 mm |
| Weight | 1.45 kg |
| Processor Type | 16-bit microcontroller |
| Program Memory | 4 KB RAM (battery-backed) |
| Load Memory | 4 KB EPROM or EEPROM |
| Processing Speed | 5 ms per 1K of bit logic |
| Number of Internal Components | 1 CPU + 1 memory submodule + 1 power supply unit |
| Interface Type | Backplane bus (for I/O modules) |
| Built-in I/O | None (requires external modules) |
| Power Supply | 115/230 V AC or 24 V DC (field-selectable) |
| Power Consumption | 15 VA typical |
| Built-in Energy Storage | 2200 µF capacitor + lithium battery socket |
| Battery Type | 3.6 V lithium (optional, not included) |
| Data Retention (with battery) | Approx. 50 days |
| Operating Temperature | 0°C to 60°C |
| Status Indicators | 2 LEDs (RUN, STOP, BATT) |
Detailed Feature Overview
This controller includes a 16-bit processor for fast logic execution. It processes 1K of bit logic in just 5 milliseconds. You can store your program in either RAM or EPROM memory.
A 2200 µF capacitor provides short-term energy buffering. With an optional lithium battery, data retention extends to 50 days. Without a battery, the capacitor holds memory for about 10 minutes.
You will find a backplane bus connector at the rear. This bus links directly to S5 I/O modules like digital or analog cards. The module accepts either AC or DC power via jumper selection.
Installation and Programming
Siemens 6ES5105-3RA11 occupies the first slot in an S5 rack. Use STEP 5 software to write and upload control programs. Always insert a memory submodule before powering up the unit.