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Module Overview
This CPU serves as the main controller for SIMATIC S5-100U compact PLC systems. You can install Siemens 6ES5100-8MA01 directly into the CPU slot of the S5-100U rack. The unit executes user programs and manages all I/O scanning duties. It provides onboard digital I/O for small to medium automation tasks.
Technical Specifications
| Parameter | Value |
|---|---|
| Dimensions (W x H x D) | 250 mm x 25 mm x 130 mm |
| Weight | 0.65 kg |
| Processor type | 8-bit microcontroller |
| Program execution speed | 3 µs per bit logic step |
| Program memory | 4 KB RAM (battery-backed) |
| Data memory | 2 KB internal flags and registers |
| Onboard digital inputs | 16 points (24V DC) |
| Onboard digital outputs | 16 points (transistor, 0.5A) |
| Scan time | 15 ms for 1K logic steps |
| Communication port | 1 x RS-232 (TTY) for programmer |
| Battery type | 3.6V lithium (replaceable) |
| Battery life | 2 years typical |
| Interface to backplane | S5-100U rack connector |
| Total onboard components | 212 discrete parts |
| Energy storage type | Lithium battery + electrolytic capacitors |
| Energy storage rating | 680 µF at 16V DC |
| Operating temperature | 0°C to +60°C |
Board Layout and Components
The PCB integrates CPU, memory, and I/O circuits on a single board. Sixteen input optoisolators line the left edge for signal isolation. Moreover, 212 discrete components include transistor output drivers and power regulation. A lithium battery retains program memory for two years typically. The onboard I/O also saves rack space for other modules.
Installation Process
You can mount Siemens 6ES5100-8MA01 into the leftmost slot of any S5-100U rack. The backplane connector carries power and I/O buses to expansion modules. Furthermore, the front panel TTY port connects to a programming device. LED indicators show CPU status and onboard I/O states clearly.
Performance Advantages
This CPU executes bit logic operations in just 3 microseconds each. The 4 KB memory stores approximately 1,000 ladder logic steps. Therefore, it controls small packaging machines and conveyor systems effectively. The 16 onboard inputs and outputs also handle basic field devices without extra modules.
Safety and Compliance
Siemens 6ES5100-8MA01 meets CE and RoHS industrial standards. The board discharges stored energy below 4V within eight seconds. Hence, technicians face minimal electrical risk during battery replacement or servicing.