Product Description

Siemens 6ES7155-5AA01-0AB0 — SIMATIC ET 200MP IM 155-5 PN ST Interface Module

For machine builders and system integrators working with distributed I/O over PROFINET, the interface module is the most critical component in a remote I/O station. It handles every aspect of communication between the controller and the field devices hung off it — and its performance ceiling defines the ceiling of the entire station. The 6ES7155-5AA01-0AB0 is Siemens' IM 155-5 PN ST for the SIMATIC ET 200MP platform: a full-featured PROFINET IO-Device interface module with IRT support, Media Redundancy Protocol, isochronous mode, and Fast Startup — all in a compact 35mm-wide DIN rail package.

New original. In stock. Ready for immediate dispatch.

Technical Specifications

Parameter	Value
Ordering Number	6ES7155-5AA01-0AB0
Product Designation	IM 155-5 PN ST
Platform	SIMATIC ET 200MP
Hardware Functional Status	FS01
Firmware Version	V4.1.0
Country of Origin	Germany
Supply Voltage (DC)	20.4–28.8V DC (nominal 24V DC)
Current Consumption (max)	200 mA
Power Dissipation (typ)	4.5W
Communication Interface	PROFINET IO
Transfer Rate	100 Mbit/s
Network Connectors	2× RJ45 (integrated 2-port switch)
Protocols	PROFINET IO, TCP/IP, PROFIsafe
IRT (Isochronous Real-Time)	Yes, ≥ 0.25 ms update time
MRP (Media Redundancy)	Yes
Isochronous Mode	Yes
Shared Device	Yes
Fast Startup (FSU)	Yes, 500 ms
I&M Data	I&M0 to I&M3
Firmware Update	Yes (via PROFINET)
Max. I/O Modules (no additional PS)	12
Max. I/O Modules (with additional PS)	30
Degree of Protection	IP20
Dimensions (H × W × D)	147 × 35 × 129 mm
Weight	0.29 kg
Operating Temp. (horizontal)	0 to +60°C
Operating Temp. (vertical)	0 to +40°C
Storage/Transport Temperature	−25 to +70°C
Explosion Protection (Gas)	ATEX Cat. 3G
Explosion Protection (Dust)	None
Mounting	DIN rail, rack, front installation
RoHS Compliance	Yes
Replaces	6ES7155-5AA00-0AB0

Engineering Tool Compatibility

Tool	Minimum Version
TIA Portal (with HSP 0223)	V14 or higher
TIA Portal (integrated)	V15 or higher
STEP 7 Classic (via GSD)	GSDML V2.32
PROFINET GSD revision	V2.3

The ET 200MP Platform: Built for the Control Cabinet

The SIMATIC ET 200MP is Siemens' modular distributed I/O system designed specifically for cabinet installation. Unlike the smaller ET 200SP (which uses a backplane bus carrier architecture) or the field-installable ET 200eco PN (rated IP65/67), the ET 200MP mounts directly onto a 35mm DIN rail and accepts the same signal and technology modules used in the SIMATIC S7-1500 central rack.

This shared module compatibility with the S7-1500 is one of the ET 200MP's most practical engineering advantages: the same 1746-series digital I/O, analog, counting, positioning, and technology modules work in both the central rack and the distributed ET 200MP station. Engineers don't need to maintain two separate module families, and spare parts inventory is consolidated.

What the IM 155-5 PN ST Does

The IM 155-5 PN ST is the PROFINET interface module that sits at the left end of an ET 200MP station and connects the entire station to the PROFINET network. It performs four core functions:

First, it handles PROFINET IO communication — advertising the station to the IO controller, exchanging cyclic process data with each I/O module in the station, and managing the diagnostic data flow back to the controller. At 100 Mbit/s with IRT update times starting from 0.25 ms, it supports demanding motion control and high-speed process applications.

Second, the integrated 2-port switch allows the module to be connected in a line topology without requiring an external network switch. One port connects upstream toward the controller; the other passes the connection downstream to the next PROFINET device. Ring topologies for Media Redundancy Protocol (MRP) are equally supported, enabling automatic network recovery within 200 ms if a cable or device fails.

Third, it provides isochronous mode — the ability to synchronize I/O processing to the PROFINET bus cycle with deterministic jitter. For applications where precise timing between sensing and actuation is critical, isochronous mode eliminates the latency variation that would otherwise accumulate across a distributed station.

Fourth, Fast Startup (FSU) brings the station online in 500 ms after power-up — roughly half the time of a standard startup sequence. In machine designs where controlled power-up sequencing matters, this measurably reduces the time from power-on to productive operation.

12 Modules vs. 30 Modules: Understanding the Limit

Without any additional power supply modules in the station, the IM 155-5 PN ST powers the backplane bus and supplies 5V DC to up to 12 I/O modules from its own internal power budget. Add a SIMATIC PM 70W power supply module (or equivalent) to the station, and the available backplane power increases enough to support up to 30 I/O modules in a single distributed station.

For a station with standard digital and analog modules in typical configurations, 12 modules comfortably covers most distributed I/O requirements. When higher channel density is needed — for example, a large valve terminal with many analog inputs, or a station combining digital, analog, and technology modules — the 30-module limit with an added PS provides substantial headroom.

Shared Device: Connecting to Two Controllers Simultaneously

The Shared Device function allows the ET 200MP station to divide its I/O modules between two separate PROFINET IO controllers. Each controller accesses a defined subset of the modules in the station. This is useful in machine architectures where a safety controller (such as a SIMATIC S7-1500F) and a standard motion controller both need access to sensors and actuators in the same physical cabinet location — without duplicating hardware or routing additional cable runs.

I&M Data: Identification and Maintenance

The module supports I&M data levels 0 through 3, which are standardized fields within the PROFINET device model used for asset identification and maintenance tracking:

I&M0 — read-only data containing manufacturer code, order number, serial number, hardware and firmware version
I&M1 — user-writable fields for tag function and location descriptors
I&M2 — user-writable installation date field
I&M3 — user-writable free-text descriptor field

These fields are readable directly from TIA Portal and from any PROFINET-capable engineering tool, providing a structured asset record that travels with the physical device without requiring a separate paper trail.

Frequently Asked Questions

Q: What is the difference between the 6ES7155-5AA01-0AB0 and its predecessor 6ES7155-5AA00-0AB0?

A: The -0AB0 (revision 01) is the current production version and replaces the -0AA0 (revision 00). It carries firmware V4.1.0 and hardware functional status FS01. The two versions are functionally compatible in most applications, but the -0AB0 is preferred for new installations as it incorporates engineering improvements and has broader TIA Portal integration from V15 onward without the need for a hardware support package.

Q: What PROFINET features does this module support?

A: The IM 155-5 PN ST supports PROFINET IO (100 Mbit/s), IRT with update times from 0.25 ms, isochronous mode, MRP for ring redundancy, Shared Device for dual-controller configurations, PROFIsafe protocol, TCP/IP, and firmware update via PROFINET. It does not support PROFIBUS — it is a PROFINET-only device.

Q: Can this module be used with SIMATIC S7-300 or S7-400 controllers?

A: The IM 155-5 PN ST is natively supported in TIA Portal from V14 onwards and integrates directly with S7-1500 controllers. It can also be used with S7-300/400 and third-party PROFINET IO controllers via its GSDML file (V2.32), which provides a standard integration path for any PROFINET IO controller regardless of vendor.

Q: What is the maximum number of I/O modules this station can hold?

A: Without any additional power supply in the station, up to 12 I/O modules can be connected to the interface module. With a SIMATIC power supply module added to the station rail, the limit extends to 30 I/O modules per station.

Q: How many PROFINET ports does the module have, and does it include a built-in switch?

A: The module has two RJ45 ports connected through an integrated 2-port PROFINET switch. This allows line (daisy-chain) and ring topologies without an external switch. Both ports operate at 100 Mbit/s full duplex.

Q: What does IRT ≥ 0.25 ms mean in practice?

A: IRT stands for Isochronous Real-Time, a PROFINET communication class that delivers cycle times with minimal and deterministic jitter — starting from 0.25 ms. This is required for motion control applications where the controller needs to read encoder values and write setpoints on a guaranteed, precisely timed cycle. Standard RT (Real-Time) communication is sufficient for most I/O applications, but when servo drives or high-speed counting modules need tight synchronization, IRT provides the timing foundation.

Q: What engineering software is required to configure this module?

A: The recommended tool is Siemens TIA Portal. The module is fully integrated from TIA Portal V15 onwards with no additional steps. For V14, a Hardware Support Package (HSP 0223) is required before the module appears in the hardware catalog. For third-party or legacy STEP 7 Classic setups, configuration is done via the GSDML file (V2.32) available from Siemens Industry Online Support.

Q: What does "New Original" mean for this listing?

A: The unit is factory-new, genuine Siemens manufacture, produced in Germany, in original Siemens packaging, and has never been installed or powered. It is not refurbished, not cosmetically reconditioned surplus, and not a copy or counterfeit. One piece is available in current stock for immediate dispatch.

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