Siemens SIMATIC ET 200SP High-Performance PROFINET Interface Module Bundle IM 155-6 PN ST (6ES7155-6AA02-0BN0) for Distributed I/O

6ES7155-6AA02-0BN0 Product Overview

The 6ES7155-6AA02-0BN0 is the IM 155-6 PN ST interface module bundle for the Siemens SIMATIC ET 200SP distributed I/O system. This bundle includes the PROFINET interface module, server module, and BA 2xRJ45 BusAdapter, ready for immediate integration.

This module serves as the communication gateway, connecting field I/O modules to a central PLC via PROFINET. It supports up to 32 I/O modules and 16 ET 200AL modules, featuring an integrated 2-port switch. As a "Standard" type, it supports Multi Hot Swapping, FW V6.4.0, IRT, and Shared Device, making it ideal for mid-to-large-scale high-performance automation solutions .

6ES7155-6AA02-0BN0 Core Features

High-Performance Communication：Integrated 2-port PROFINET switch with IRT support, minimum update time of 1ms, MRP, and MRPD for network redundancy .

Massive Scalability：Manages up to 32 ET 200SP modules and 16 ET 200AL modules, with a max address space of 1440 bytes .

Multi Hot Swapping：Supports module exchange during operation, minimizing downtime. Supports exchange of individual BusAdapters .

Comprehensive Functionality：Supports Shared Device (up to 4 controllers), I&M data 0-4, PROFIenergy, and wide operating temperature (-30°C to 60°C horizontal) .

Diagnostics & Safety：PROFIsafe ready, clear LED status indicators (RUN/ERROR/MAINT/LINK), and firmware update capability .

Compact Design：Width only 50mm, weight approx. 120g without BusAdapter .

6ES7155-6AA02-0BN0 Applications

Distributed Automation Plants：Gateway for ET 200SP stations in automotive, logistics, and tire manufacturing .

High-Performance Motion Control：IRT synchronization for printing, packaging, and servo drive applications.

Process Automation：MRP ring network redundancy for chemical or water treatment.

Standard Machinery：PROFINET IO device for HVAC, pump, and fan monitoring.

Remote Extensions：Combined with IP65/67 ET 200AL modules for outdoor or wet environments .

6ES7155-6AA02-0BN0 Key Advantages

Ready-to-use Bundle：Includes module, server module, and BA 2xRJ45 – no separate ordering required.

Industry-Leading Scalability：Supports 32 modules without slot rules for maximum configuration flexibility .

Seamless TIA Integration：Fully integrated into TIA Portal from V14 to V20 for efficient engineering .

Advanced Redundancy：MRPD support for zero failover time in ring networks .

Mature Ecosystem：Backed by Siemens SIMATIC global standard, extensive support and documentation available.

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FAQ:

1. What is the 6ES7155-6AA02-0BN0 bundle and what does it include?
   This is a complete starter bundle for an ET 200SP PROFINET station. It contains the IM 155‑6 PN ST interface module (the “head” of the station that manages all communication with the PROFINET controller) and the required server module (the bus termination plug that closes the backplane bus). With these two components and the desired I/O modules on BaseUnits, you can build a fully functional distributed I/O station.

2. What is the difference between the IM 155‑6 PN ST and the IM 155‑6 PN HF?
   The ST (Standard) interface module is optimized for general‑purpose automation tasks. It supports up to 64 I/O modules and RT (real‑time) communication. The HF (High‑Feature) version adds support for isochronous mode, media redundancy (MRP), and a larger backplane bus bandwidth. If your application requires deterministic cycle‑to‑cycle timing or ring network redundancy, choose the HF variant; for most standard machine automation, the ST is an excellent, cost‑optimized choice.

3. How many I/O modules can I connect to the IM 155‑6 PN ST?
   The IM 155‑6 PN ST supports a maximum of 64 modules (including the server module) and up to 256 bytes of input and 256 bytes of output data per station. This is sufficient for medium‑sized automation cells with a mix of digital and analog I/O, technology modules, and communication processors.

4. What is the server module included in the bundle, and why is it necessary?
   The server module is a small plug‑in terminator that snaps onto the rightmost BaseUnit of the ET 200SP station. It closes the backplane bus and ensures proper communication termination. Without the server module, the station will not function. The bundle provides one server module, so you can commission the station immediately after mounting the I/O modules.

5. Does the IM 155‑6 PN ST support isochronous mode?
   No. Isochronous mode, which guarantees fixed and repeatable update times for motion control and high‑speed applications, is only available on the HF (High‑Feature) variant. The ST version supports RT (real‑time) communication, which is sufficient for the vast majority of standard automation tasks.

6. What PROFINET features does the IM 155‑6 PN ST provide?
   It features an integrated 2‑port PROFINET switch (RJ‑45) supporting line, star, and ring topologies (MRP client via external switch). It supports RT communication, shared device functionality, and automatic addressing via LLDP. The module is fully integrated into the TIA Portal hardware catalog and can be configured with a few clicks.

7. How is the IM 155‑6 PN ST powered?
   The interface module is powered by 24 V DC (typically from a separate power supply or via the AUX bus of the BaseUnit). The power terminals are clearly marked on the module. The 24 V supply powers the IM and provides the backplane bus power for all plugged‑on I/O modules, eliminating the need for an external system power supply.

8. Can I replace the IM 155‑6 PN ST without powering down the station?
   No. The interface module itself is not hot‑swappable because it powers the backplane bus. However, all I/O modules plugged onto the BaseUnits can be hot‑swapped while the IM is running. To replace the IM, you must de‑energise the station. The server module and all I/O wiring remain undisturbed.

9. How do I configure the IM 155‑6 PN ST in TIA Portal? What versions are supported?
   The module is supported from TIA Portal V13 SP1 onward. After inserting the IM from the hardware catalog, you assign a PROFINET device name, set the IP address, and configure the I/O modules in the station. The bundle’s server module is automatically recognized. The integrated web server also allows basic diagnostics without TIA Portal.

10. What are the most typical applications for this bundle?
    It is the foundation for building distributed I/O stations in machine tools, conveyor systems, packaging machines, and process skids. The bundle simplifies ordering because you get the IM and the essential server module in one package. Together with ET 200SP BaseUnits and I/O modules, it creates a compact, reliable, and easily expandable PROFINET I/O node.