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6ES7151-7AA21-0AB0

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Within ET 200S, Siemens 6ES7151-7AA21-0AB0 is an IM151-7 CPU interface module that runs local control logic and exchanges distributed I/O data as a PROFIBUS DP slave.
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Technical specifications for 6ES7151-7AA21-0AB0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7151-7AA21-0AB0
  • Product Family:
    Siemens Simatic DP
  • Product Type:
    SIMATIC ET 200S IM151-7 CPU Interface Module
  • Stock:
    1
  • Work Memory:
    128 KB
  • PROFIBUS Role:
    DP slave
  • PROFIBUS Interface:
    9-pin D-sub female
  • Load Memory:
    SIMATIC Micro Memory Card required
  • Maximum Peripheral Modules:
    63
  • Station Width:
    Less than 1 m or less than 2 m, configuration-dependent
  • Maximum Load per Power Group:
    10 A
  • Process Image Inputs:
    256 bytes
  • Process Image Outputs:
    256 bytes
  • MPI Interface:
    187.5 kbit/s
  • Supply Voltage:
    24 V DC
  • Permissible Supply Range:
    19.2 to 28.8 V DC
  • Mains Buffering:
    5 ms
  • Maximum Current Consumption:
    700 mA
  • Programming Package:
    STEP 7 V5.5 SP1 or V5.2 SP1 with HSP 219
  • Weight:
    0.5379 lbs (0.244 kg)
  • Estimated shipping dimensions:
    9.3x12.6x8.3cm
  • 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 Program Memory DP Slave Exchange Local I/O Control Power Groups

Features:

  • A 128 KB CPU executes the local ET 200S program.
  • The nine-pin interface exchanges station data as a PROFIBUS DP slave.
  • A SIMATIC MMC provides the required load memory.
The CPU controls attached ET 200S modules through the internal station bus.

Configured transfer areas separate local process data from the DP-master exchange.

Power modules divide field loads while the interface module maintains station processing.

The Siemens 6ES7151-7AA21-0AB0 ET 200S IM151-7 CPU may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7151-7AA21-0AB0 ET 200S IM151-7 CPU 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 stored project data from active CPU execution

  • MMC load memory: The required SIMATIC MMC stores the load program and project data.
  • Work memory: The integrated 128 KB memory holds the active blocks and runtime data.
  • Startup relation: The CPU loads the accepted project from the memory card before execution.
  • Replacement check: MMC contents and hardware article number must belong to the intended station.

Moving selected station data to the PROFIBUS master

  • Physical link: The nine-pin D-sub socket connects the module to PROFIBUS DP.
  • Slave role: The higher-level DP master controls the cyclic exchange relationship.
  • Transfer areas: Configured input and output bytes define which local data crosses the bus.
  • Address match: The node address and hardware project must agree at both ends.

Processing ET 200S modules on the internal station bus

  • Backplane path: Attached electronic modules exchange values with the local CPU.
  • Module count: The documented configuration allows up to 63 peripheral modules.
  • Process image: Assigned I/O addresses are updated for the local STEP 7 program.
  • Station layout: Width and load-group rules constrain the physical module sequence.

Dividing CPU supply from downstream field-load distribution

  • Interface supply: A 24 V DC input powers the CPU and ET 200S interface electronics.
  • Power modules: Downstream modules divide field circuits into defined load groups.
  • Current boundary: Each power group remains within the documented load limit.
  • Fault tracing: Supply, local-module and PROFIBUS conditions are read as separate diagnostics.
Description
Within an ET 200S distributed station, Siemens 6ES7151-7AA21-0AB0 is the IM151-7 CPU interface module that executes a local STEP 7 program while operating as a PROFIBUS DP slave. It combines CPU processing, ET 200S backplane control and master-station data exchange in one module.

Program blocks for 6ES7151-7AA21-0AB0 are loaded from the required SIMATIC Micro Memory Card into the integrated work memory for execution. The MMC therefore carries the load program and project data, while the CPU work memory holds the active code and values used during operation.

Through its nine-pin PROFIBUS connection, 6ES7151-7AA21-0AB0 exchanges the configured input and output areas with the DP master. Local ET 200S modules remain on the internal station bus, allowing the CPU program to process assigned I/O before selected data crosses the PROFIBUS link.

The 24 V DC supply of 6ES7151-7AA21-0AB0 powers the CPU and ET 200S interface section, while downstream power modules divide field loads into separate groups. Station width, module count and load-group current must be checked together when arranging the distributed I/O.

Diagnostic buffers and status indicators on 6ES7151-7AA21-0AB0 separate CPU state, local module faults and PROFIBUS conditions. STEP 7 reaches the station through the documented programming path to read those records and compare them with the saved hardware configuration.
Alternative Names
6ES71517AA210AB0 6ES7 151-7AA21-0AB0 6ES7151 7AA21 0AB0 Siemens IM151-7 CPU 6ES7151-7AA21-0AB0 ET 200S 128KB CPU IM151-7 PROFIBUS DP Slave CPU 6ES7151-7AA2I-0AB0 6ES7I51-7AA21-0AB0
Technical notes
A SIMATIC MMC is required for Siemens 6ES7151-7AA21-0AB0 because its load memory is external. Preserve the project and PROFIBUS address before replacement.
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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.
Why will Siemens 6ES7151-7AA21-0AB0 not start without a memory card?
Siemens 6ES7151-7AA21-0AB0 requires a SIMATIC MMC for its load memory. Install the card containing the approved project before expecting the CPU to enter operation.
What should be saved before replacing 6ES7151-7AA21-0AB0?
Preserve the STEP 7 project, MMC contents, PROFIBUS address and configured transfer areas for 6ES7151-7AA21-0AB0, then compare the hardware version before startup.
Why can local I/O on 6ES7151-7AA21-0AB0 work while DP data is missing?
The local CPU of 6ES7151-7AA21-0AB0 can process attached ET 200S modules independently of a valid master exchange. Check the PROFIBUS cable, address and transfer-area configuration.
How many ET 200S modules can follow 6ES7151-7AA21-0AB0?
The documented configuration for 6ES7151-7AA21-0AB0 permits up to 63 peripheral modules, subject to station-width and power-group limits.
Where is the active program executed on 6ES7151-7AA21-0AB0?
The 6ES7151-7AA21-0AB0 loads blocks from the required MMC into its integrated 128 KB work memory, where the CPU executes them.
Which diagnostic path separates a DP fault from a local module fault on 6ES7151-7AA21-0AB0?
Read the diagnostic buffer and front status of 6ES7151-7AA21-0AB0 in STEP 7; the records identify CPU, ET 200S module and PROFIBUS conditions separately.