SIMATIC ET 200S | IM151-7 CPU spare part
Siemens 6ES7151-7AA21-0AB0 SIMATIC ET 200S IM151-7 CPU
A 24 V DC ET 200S interface CPU with 128 kB work memory, an integrated PROFIBUS DP slave interface and mandatory SIMATIC Micro Memory Card.
BrandSiemens
Model6ES7151-7AA21-0AB0
Identification6ES7151-7AA21-0AB0
01
Key Information
6ES7151-7AA21-0AB0 identifies the SIMATIC DP IM151-7 CPU for ET 200S. It combines distributed-I/O interfacing and local program execution with 128 kB of integrated work memory and a nine-pole D-sub PROFIBUS DP connection operating as a DP slave.
The CPU is supplied without a battery and requires a SIMATIC Micro Memory Card for load memory and maintenance-free backup. Siemens lists the product as a cancelled spare part, making the exact order number and stored application essential during maintenance.
02
Functions
- Executes a local SIMATIC control program within an ET 200S distributed I/O station.
- Exchanges station data with the higher-level PROFIBUS DP master through the integrated slave interface.
- Provides 128 kB of non-expandable integrated work memory.
- Uses a SIMATIC Micro Memory Card with capacity up to 8 MB as plug-in load memory.
- Supplies as much as 700 mA at 5 V DC to the ET 200S backplane bus.
- Supports engineering in the documented STEP 7 Classic or TIA Portal contexts.
03
Specifications
| Manufacturer | Siemens |
|---|---|
| Product Family | SIMATIC ET 200S |
| Product Type | IM151-7 interface CPU |
| Order Number | 6ES7151-7AA21-0AB0 |
| Work Memory | 128 kB integrated |
| Load Memory | SIMATIC Micro Memory Card required, up to 8 MB |
| Rated Supply Voltage | 24 V DC |
| Current from 1L+ | Maximum 320 mA; 410 mA with DP master module |
| Backplane Output | Maximum 700 mA at 5 V DC |
| Typical Power Loss | 4.2 W |
| PROFIBUS Interface | Integrated DP slave, 9-pole D-sub socket |
| Firmware Version | V3.3 |
| Typical Bit Operation Time | 0.06 microseconds |
| Typical Word Operation Time | 0.12 microseconds |
| Engineering Baseline | STEP 7 V5.5 SP1, or documented earlier package with HSP 219, or TIA Portal V11 |
| Lifecycle | Cancelled since 1 October 2023; spare-part service |
04
Installation
- De-energize the ET 200S station and retain the exact module order before changing the interface CPU.
- Protect and verify the SIMATIC Micro Memory Card because it carries the load memory and maintenance-free backup context.
- Record the PROFIBUS address, station configuration, baud-rate environment and higher-level master assignment.
- Check the total ET 200S backplane current demand against the available 700 mA output.
- Use the supported STEP 7 hardware catalog entry and preserve any required Hardware Support Package.
- After replacement, validate DP diagnostics, local program execution, station I/O addressing and retained process data.
05
Lifecycle
- Siemens classifies 6ES7151-7AA21-0AB0 as a cancelled product available through the spare-part service context.
- The product cancellation effective date is 1 October 2023, so long-term planning should distinguish immediate service from system modernization.
- No direct modern replacement should be selected without reviewing the ET 200S station, PROFIBUS master and local CPU program.
- Archive the STEP 7 project, Micro Memory Card content and complete station hardware configuration before migration.
- A platform change can affect I/O modules, terminal modules, network engineering and the local control architecture.
