Ask our team:
  • Phone: +86 181 0690 9650
  • E-Mail sales1@apterpower.com
  • Lifecycle status

    Discontinued / Obsolete by OEM
    Manuals, quotations, and model-selection support for 6ES5948-3UA23 are coordinated by Apter Power.

6ES5948-3UA23

/ 4.9
1001 reviews | Need a Specific Revision?
Siemens 6ES5948-3UA23 is a CPU 948 central processing unit that executes the control program and manages data exchange in a SIMATIC S5-155U system.
In Stock
Ships by Wednesday, October 28
Fast Shipping Available
Get a quick price for 6ES5948-3UA23
Quantity
*E-mail
Company
*Mobile
*Content
Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)

Technical specifications for 6ES5948-3UA23

  • Manufacturer:
    Siemens
  • Part Number:
    6ES5948-3UA23
  • Product Family:
    Siemens Simatic S5
  • Product Type:
    SIMATIC S5-155U CPU 948 Central Processing Unit
  • Stock:
    1
  • Processor Version:
    CPU 948
  • Controller Platform:
    SIMATIC S5-155U
  • RAM Capacity:
    1664 KB
  • User Memory:
    Plug-in memory submodule slot
  • Programming Connection:
    15-pin PG interface
  • Operating Controls:
    RUN/STOP mode selection and reset
  • Front Status Indicators:
    CPU, program and interface states
  • Auxiliary Interfaces:
    SI1 and SI2 connection positions
  • Tariff Code:
    85371091
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Memory Path Mode Controls PG Access Status Indication

Features:

  • The CPU 948 executes the control program inside a SIMATIC S5-155U rack.
  • A plug-in user-memory carrier keeps the program medium separate from the processor hardware.
  • Front controls and indicators expose operating, program and interface conditions.
The processor exchanges rack data while maintaining the current program execution state.

Programming access reaches the CPU through its dedicated front connection.

Auxiliary interface positions and status lamps help isolate a communication condition from a selected STOP state.

The Siemens 6ES5948-3UA23 SIMATIC S5-155U CPU 948 may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES5948-3UA23 CPU 948 Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Separating processor RAM from the program carrier

  • Working memory: The CPU uses its installed RAM while executing the controller program.
  • User-memory slot: A removable memory submodule occupies the dedicated front position.
  • Exchange handling: The existing memory carrier must be identified before replacing the processor.
  • Program boundary: A CPU exchange does not automatically reproduce the contents of a missing user-memory module.

Relating the front controls to CPU operation

  • RUN selection: The mode switch permits program execution when the controller conditions are satisfied.
  • STOP selection: The selected STOP state halts execution without identifying the reason for every fault.
  • Reset control: Reset operation follows the documented S5 procedure for the processor.
  • State check: Indicator status must be read together with the selected mode and installed memory.

Using the programming connection without mixing interface roles

  • PG connector: The 15-pin front interface provides the programming-device connection.
  • Service path: Program transfer and online diagnostics use that dedicated access point.
  • Auxiliary positions: SI1 and SI2 are separate interface locations with their own assignments.
  • Connection check: The cable and interface role must be identified before an online session is attempted.

Interpreting local processor conditions

  • Operating state: RUN and STOP indications reflect the current CPU mode.
  • Program condition: CPU fault lamps distinguish processing problems from normal execution.
  • Interface state: Separate indicators correspond to the documented serial interface paths.
  • Diagnostic sequence: Read the front pattern before moving memory or changing the operating mode.
Description
Siemens 6ES5948-3UA23 is the CPU 948 central processing unit for a SIMATIC S5-155U controller, where it executes the user program and coordinates data between the rack, memory and connected interfaces.

Program and operating data for 6ES5948-3UA23 use the processor RAM together with the removable user-memory submodule fitted at the front. The memory carrier therefore belongs to the program path and must not be confused with the CPU hardware itself.

The front panel of 6ES5948-3UA23 separates the programming connection, auxiliary interface positions, mode controls and status indicators. Their states help determine whether a stopped controller is in the selected operating mode, reporting a program condition or missing an expected interface path.
Alternative Names
6ES59483UA23 6ES5948 3UA23 6ES5 948-3UA23 Siemens 6ES59483UA23 CPU 948 6ES5948-3UA23 SIMATIC S5-155U 6ES5948-3UA23 6ES5948-3UA2B 6ES594B-3UA23
Technical notes
Siemens 6ES5948-3UA23 is the 1664 KB CPU 948 for SIMATIC S5-155U; preserve the installed user-memory submodule and interface assignment during exchange.
Exceptional Service

Our Mission

  • 100% Satisfaction

    We believe expertise is priceless. With over 20 years of experience, and top engineers on staff, we can help you solve or avoid problems that threaten your business.
  • Trust Guaranteed

    Not only do we have a vast inventory, our team makes sure every piece of equipment is in working condition. Your purchases are also backed by our Warranty.
  • Expertise

    Time is money, especially when your equipment is down. We work quickly to get your equipment on its way so you can get it back up and running.

FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What should be transferred when replacing 6ES5948-3UA23 in an S5-155U rack?
Identify and preserve the user-memory submodule associated with 6ES5948-3UA23 before removing the CPU. The replacement processor does not recreate program contents that remain on a separate memory carrier.
Why can 6ES5948-3UA23 remain in STOP even when the mode switch is set for operation?
Read the front indicators on 6ES5948-3UA23 and verify the installed memory and rack conditions. A selected RUN position cannot override a program, processor or interface condition reported by the CPU.
Which front connection belongs to programming access on 6ES5948-3UA23?
Use the dedicated 15-pin PG interface on 6ES5948-3UA23 for the programming-device path. Do not assume that an auxiliary SI position has the same assignment or cable requirement.
How can an interface problem be separated from a processor-mode problem on 6ES5948-3UA23?
Compare the SI-related indicators with the RUN, STOP and CPU fault states on 6ES5948-3UA23. This shows whether the missing exchange belongs to a communication path or to stopped program execution.
Does the 1664 KB value on 6ES5948-3UA23 describe the removable memory module?
No. The 1664 KB figure identifies RAM provided by 6ES5948-3UA23, while the user-memory submodule is a separate plug-in program carrier. Confirm both items during replacement planning.

Product Browsing History