Siemens 6ES5948-3UA21 Processor Module

The 6ES5948-3UA21 serves as a high-performance processor module for SIMATIC S5 systems. This unit executes complex user programs with advanced communication capabilities. Its rectangular frame measures 232 millimeters in width. The module height reaches 210 millimeters exactly. Depth stays at 155 millimeters. You will find this unit weighs approximately 1.35 kilograms. Therefore, installation requires sliding the module into a standard S5 rack slot. One front-panel serial port connects to programming software.

Physical Layout and Connectors

The front panel features a 4-line LCD display for system diagnostics. You will find eight push buttons for local configuration access. One RS-232 port supports connection to a programming terminal. Four status LEDs indicate run, stop, error, and power conditions. Two guide rails secure the module firmly in the rack.

Technical Specifications

Parameter	Specification
Module Width	232 mm
Module Height	210 mm
Module Depth	155 mm
Unit Weight	1.35 kg
Processor	16-bit @ 16 MHz
Program Memory	64 KB (EPROM)
Data Memory	32 KB (retentive)
Scan Time	1.0 ms per 1K instructions
Digital I/O Capacity	2048 max
Communication Port	RS-232 (programming)
Component Total	856 discrete parts
Internal Energy Storage	2200 µF capacitor bank
Backup Battery	Lithium (3.6V, 5 years)
Operating Temperature	0°C to +55°C

Internal Design and Energy Storage

The 6ES5948-3UA21 contains exactly 856 discrete components inside. A 2200 microfarad capacitor bank filters the main power supply input. This bank holds enough charge for 25 milliseconds after power loss. The 16-bit processor runs at 16 megahertz for faster execution. A lithium battery retains data memory for up to five years. EPROM stores the user program without any battery backup required.

Operational Performance

This processor module executes logic from 64 kilobytes of program memory. It scans 1,000 instructions in approximately 1.0 milliseconds. Moreover, the unit handles up to 2048 digital I/O points system-wide. The RS-232 port allows connection to programming software and HMIs. The LCD display shows real-time system status and diagnostic messages. Eight buttons let you navigate menus without a programming computer. Consequently, you achieve powerful control for larger automation projects. Siemens designed this processor for demanding SIMATIC S5 applications.

In summary, the 6ES5948-3UA21 delivers high-performance processor capability. Use this CPU for complex machinery or process control systems. It provides faster scan times for time-critical applications. Order this processor module for your Siemens SIMATIC S5 system.