Product Introduction
When upgrading legacy S5-155H control systems, the Siemens 6ES5948-3UR23 CPU 948R-2 processor module delivers the performance and memory capacity required for complex automation tasks. This module is part of the SIMATIC S5-155H family and is designed as a direct replacement or upgrade for existing central controllers. With 1664 Kbytes internal RAM for user program and data, plus support for up to 4096 Kbytes external flash EPROM memory via a submodule, it provides substantial storage for demanding applications. The module includes a 20 mA current loop (TTY) interface for operator panels, programmers, and PCs via a 15-way Cannon socket, as well as a slot for a PG interface module for additional TTY connectivity.
Key Features & Specifications
The Siemens 6ES5948-3UR23 processor module offers the following key features derived from its design:
- Internal memory: 1664 Kbytes RAM for user program and data
- External memory expansion: up to 4096 Kbytes (Flash EPROM) via memory submodule
- Interfaces: 1 x 20 mA current loop (TTY) for OP/PG/PC (15-way Cannon socket)
- Additional slot for PG interface module with TTY (20 mA) interface
- 1 x slot for memory submodule (Flash EPROM)
- Single-width format for compact installation in S5-155H racks
Please note that detailed technical specifications were not provided in the database; contact PLC Source PRO for comprehensive datasheets.
Real-World Applications
The Siemens 6ES5948-3UR23 is ideal for upgrading aging S5-155H systems in industries such as manufacturing, process control, and material handling. Its large internal memory supports complex control algorithms and data logging, while the TTY interfaces enable seamless connection to legacy operator terminals and programming devices. For example, in a chemical batch processing plant, this CPU can manage multiple recipe sequences and communicate with a central SCADA system via the PG interface module.
Installation & Setup Guidance
When installing the Siemens 6ES5948-3UR23, ensure the rack is properly grounded and the module is seated firmly in the designated slot. The single-width design allows easy insertion. Connect the TTY interface using the provided 15-way Cannon connector for OP/PG/PC communication. If using an external memory submodule, verify it is correctly inserted before powering on. Configure the CPU using the SIMATIC STEP 5 software; set the memory partition according to your application requirements.
Compatibility & Integration
The Siemens 6ES5948-3UR23 is specifically designed for the SIMATIC S5-155H central controller family. It works with standard S5 backplanes and can be integrated with other S5 modules such as digital I/O, analog I/O, and communication processors. The TTY interface supports connections to Siemens OP series operator panels, PG programming devices, and PCs with appropriate adapters.
Selection Guide & Purchasing Advice
Before purchasing the Siemens 6ES5948-3UR23, verify that your system is based on the S5-155H architecture. Check the power supply capacity and ensure you have the necessary programming software (STEP 5). For reliable procurement, consider sourcing from PLC Source PRO (ubest101.myshopify.com), an authorized supplier of industrial automation spares. This processor module is a direct replacement for earlier CPU variants in the S5-155H line, enabling a cost-effective upgrade path.