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This central controller manages logic execution for SIMATIC S5 automation racks. It processes user programs and communicates with I/O modules seamlessly. You can rely on this unit for small to medium control tasks.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand | Siemens |
| Model | Siemens 6ES5101-8UA12 |
| Category | Central Controller (SIMATIC S5 Series) |
| Dimensions (H x W x D) | 250 mm x 85 mm x 210 mm |
| Weight | 1.38 kg |
| Processor Type | 8-bit microcontroller |
| Program Memory | 2 KB RAM (battery-backed) |
| Load Memory | 2 KB EPROM |
| Processing Speed | 15 ms per 1K of bit logic |
| Number of Internal Components | 1 CPU + 1 memory module + 1 power supply |
| Interface Type | Backplane bus + 1x programming port (TTY) |
| Built-in I/O | None (requires external S5 modules) |
| Power Supply | 115 V AC or 230 V AC (selectable) |
| Power Consumption | 12 VA typical |
| Built-in Energy Storage | 1000 µF capacitor + battery backup socket |
| Battery Type | 3.6 V lithium (not included) |
| Data Retention (with battery) | Approximately 30 days |
| Status Indicators | 3 LEDs (POWER, RUN, STOP) |
| Operating Temperature | 0°C to 55°C |
Detailed Feature Overview
This controller uses an 8-bit processor for basic automation needs. It executes 1K of bit logic in roughly 15 milliseconds. You can store your control program in the onboard 2 KB RAM.
A 1000 µF capacitor provides short-term energy during power dips. With an optional lithium battery, data retention extends up to 30 days. Consequently, your logic remains safe during brief outages.
You will find a TTY programming port at the front panel. This port connects to a programmer or PC via an appropriate adapter. The backplane bus links directly to S5 I/O cards without extra cabling.
Installation and Programming
Siemens 6ES5101-8UA12 fits the first slot of an S5 rack. Use STEP 5 software to upload or modify your control logic. Set the voltage selector correctly before applying AC power.