Description
CPU 948R — Processor
Siemens · CPU 948R · 6ES5948-3UR23
Description
The CPU 948R is a high-performance central processing unit for the SIMATIC S5-155H (redundant/fault-tolerant) and S5-135U programmable controllers. It executes the STEP 5 user program, supports large program/data memory via plug-in memory submodules, and in the S5-155H is deployed in a redundant pair with automatic switchover for high-availability control applications such as power-plant DCS.
Key specifications
Parameter | Value |
Function | Central processing unit, S5-155H (redundant) / S5-135U |
Programming language | STEP 5 (STL, LAD, CSF, GRAPH 5) |
Redundancy | Deployable as redundant CPU pair in S5-155H with automatic switchover |
Memory | Plug-in RAM/EPROM/EEPROM memory submodules (capacity per submodule ordered separately) |
Interfaces | PG interface; expandable with IM3xx rack couplers, IM308-C PROFIBUS-DP master, CPs |
Battery backup | Integrated lithium battery backup for RAM retention |
Reference
Field | Value |
Manufacturer (OEM) | Siemens |
Model | CPU 948R |
Part number | 6ES5948-3UR23 |
Category | Processor |
System family | SIMATIC S5-155H/135U |
GT stores quantity | 18 |
Data confidence | high |
Manuals filed (007 - Manuals)
- 02 - CPU948 Programming Manual.pdf — Direct CPU948 programming manual
- S5_155H_CPU948R_PG_Vol.2_E05_00.03_e.pdf — CPU948R programming guide, Volume 2, exact model match
- S5_155H_CPU948R_M_Vol.1_E06_99.08_e.pdf — CPU948R hardware manual, Volume 1, exact model match
Notes
Direct manual matches found in Drive specific to the CPU 948R model.
Source: Sohar 1 DCS field-component stores inventory (Total GT_BOP). Filed in the AI HW Knowledge Base.