Siemens 6ES7151-7AA13-0AB0 IM151-7 CPU

Intelligent Processing Unit for Decentralized Automation

The 6ES7151-7AA13-0AB0 functions as the IM151-7 CPU interface module for the SIMATIC ET 200S distributed I/O system . This module integrates an S7-314 CPU into the ET 200S station, enabling it to operate as a “smart slave” capable of autonomous control . It executes control logic locally, distributing processing tasks away from the main PLC. Consequently, this design significantly reduces the computational load on the central controller .

Technical Specifications

The table below details the key technical parameters for the 6ES7151-7AA13-0AB0 CPU module.

Parameter	Specification
Manufacturer	Siemens
Product Type	CPU Interface Module (IM151-7)
Series	SIMATIC ET 200S
Work Memory	96 KB (integrated)
Load Memory	MMC expandable up to 8 MB
Supply Voltage	24 V DC (20.4 to 28.8 V range)
Current Consumption (Typ.)	250 mA (280 mA with DP master module)
Backplane Bus Current (5V)	Max. 700 mA
Power Loss (Typ.)	3.3 W
Integrated Interface	PROFIBUS DP (9-pin SUB-D)
Transmission Rate (Max.)	12 Mbit/s
CPU Processing Speeds	Bit: 0.1 µs / Word: 0.2 µs / Fixed: 2 µs / Float: 3 µs
Number of Blocks (Max.)	1,024 (DBs, FCs, FBs)
I/O Address Area (Max.)	2,048 bytes each for inputs and outputs
Connectable DP Slaves (Max.)	32
Number of Connections (Max.)	12
Hardware Clock	Yes, battery-backed (6 weeks backup typical)
Dimensions (W x H x D)	60 mm x 119.5 mm x 75 mm
Weight (Approx.)	200 g

Communication and Application

The 6ES7151-7AA13-0AB0 acts as a DP slave on the PROFIBUS network while also functioning as a standalone CPU for its local ET 200S station . You can add the DP master module (6ES7138-4HA00-0AB0) to transform this unit into a PROFIBUS DP master . For this reason, this module suits machine-level control, packaging systems, and functional unit automation that demands decentralized intelligence. Moreover, its modular design supports up to 63 peripheral modules per station .

Lifecycle and Configuration

This product has reached the end of its active lifecycle and Siemens now lists it as a spare part . For new projects, we recommend using the IM 151-8 PN/DP (6ES7151-8AB01-0AB0) as the PROFINET-enabled successor . Furthermore, configuration requires STEP 7 V5.3 or higher with an appropriate HSP (Hardware Support Package) . Notably, this CPU requires a SIMATIC MMC card for operation, as it lacks internal battery backup for the program memory .