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Module Overview
This processor module serves as the central control unit for S5-115U automation systems. You can install Siemens 6ES5948-3UA13 directly into the CPU slot of an S5-115U rack. The unit executes user programs and manages all I/O scanning duties. It handles complex control tasks with expanded memory capacity.
Technical Specifications
| Parameter | Value |
|---|---|
| Dimensions (W x H x D) | 250 mm x 25 mm x 130 mm |
| Weight | 0.68 kg |
| Processor type | 16-bit microcontroller |
| Program execution speed | 1.5 µs per bit logic step |
| Program memory | 48 KB RAM (battery-backed) |
| Data memory | 8 KB internal flags and registers |
| Maximum I/O points | 1024 digital or 128 analog |
| Scan time | 8 ms for 1K logic steps |
| Communication ports | 1 x RS-232 (TTY), 1 x RS-485 (AS511) |
| Built-in functions | PID controller, counter, timer |
| Battery type | 3.6V lithium (replaceable) |
| Battery life | 3 years typical |
| Interface to backplane | S5-115U rack connector |
| Total onboard components | 245 discrete parts |
| Energy storage type | Lithium battery + electrolytic capacitors |
| Energy storage rating | 880 µF at 16V DC |
| Operating temperature | 0°C to +60°C |
Board Layout and Components
The PCB places the 16-bit CPU at the center for optimal performance. Large electrolytic capacitors stabilize the internal power rails during processing. Moreover, 245 discrete components include bus drivers and memory management circuits. A lithium battery retains program and data memory for three years typically. The onboard PID functions also offload complex math from the user program.
Installation Process
You can mount Siemens 6ES5948-3UA13 into the CPU slot of any S5-115U rack. The backplane connector carries power and I/O buses to expansion modules. Furthermore, front panel ports connect to programming devices and operator panels. LED indicators show CPU status, run mode, and error conditions clearly.
Performance Advantages
This processor executes bit operations in just 1.5 microseconds each. The 48 KB memory stores approximately 16,000 ladder logic steps. Therefore, it controls complex machinery with many I/O points efficiently. The built-in PID loops also handle temperature and pressure regulation without extra modules.
Safety and Compliance
Siemens 6ES5948-3UA13 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.