SIEMENS 6ES7155-6AA01-0BN0 — PROFINET Interface Module for ET 200SP Distributed I/O | SIMATIC ET 200SP Platform
Engineering Background
The ET 200SP distributed I/O system is Siemens’ flagship modular field-level solution for SIMATIC S7-1200 and S7-1500 controller architectures. Designed for high-density cabinet installations, the ET 200SP platform delivers deterministic PROFINET communication with sub-millisecond cycle times, making it the preferred choice for machine builders and system integrators across automotive, food & beverage, and process industries.
Product Positioning
The 6ES7155-6AA01-0BN0 (IM155-6PN ST) is the standard-class PROFINET interface module that serves as the communication head for an ET 200SP station. It connects the distributed I/O station to the PROFINET network via two integrated RJ45 ports supporting line, star, and ring topologies. This module is the entry point for engineers building cost-optimised yet fully capable distributed I/O nodes without compromising on Siemens TIA Portal integration.
Complete Technical Specifications
| Order Number | 6ES7155-6AA01-0BN0 |
| Module Designation | IM155-6PN ST (Standard) |
| Platform | SIMATIC ET 200SP |
| Communication Protocol | PROFINET IO (IRT / RT) |
| Network Ports | 2 × RJ45 (integrated switch, 100 Mbit/s) |
| Topology Support | Line, Star, Ring (MRP) |
| Max. I/O Modules per Station | 64 (ET 200SP I/O modules) |
| Supply Voltage | 24 V DC (via backplane bus) |
| Current Consumption (24 V) | Approx. 100 mA |
| Backplane Bus | ET 200SP BaseUnit (BU type A0 / B0) |
| Included Accessories | Bus Adapter (BA) 2×RJ45 |
| Dimensions (W × H × D) | 15 mm × 117 mm × 74 mm |
| Weight | Approx. 230 g (module + BA) |
| Operating Temperature | −20 °C to +60 °C |
| Storage Temperature | −40 °C to +70 °C |
| Degree of Protection | IP20 |
| Certifications | CE, UL, cULus, ATEX Zone 2 (with appropriate housing) |
| TIA Portal Support | V13 SP1 and above |
| Firmware Update | Via PROFINET / TIA Portal online |
| PROFINET Device Name | Configurable via TIA Portal / DCP |
| Isochronous Real-Time (IRT) | Supported (send clock ≥ 250 µs) |
| PROFIenergy | Supported |
| Shared Device | Supported (up to 2 IO controllers) |
Proven Application Environments
- Automotive Assembly Lines — High-speed IRT communication for synchronised robot cell I/O
- Food & Beverage Packaging — Hygienic cabinet design with compact 15 mm pitch modules
- Intralogistics & Conveyor Systems — Ring topology with MRP for fault-tolerant network redundancy
- Machine Tool & CNC — Shared Device function enabling dual-controller architectures
- Process Industry Panels — ATEX Zone 2 compatibility for hazardous area installations
- Building Automation — PROFIenergy support for energy-saving standby modes
Engineering Advantages
- Integrated 2-Port Switch — Eliminates external network switches in line topology, reducing cabinet footprint and BOM cost
- Hot-Swap I/O Modules — ET 200SP I/O modules can be replaced under power without station shutdown (with appropriate BaseUnit)
- Shared Device — A single ET 200SP station can be split between two S7-1500 controllers for redundant or multi-domain architectures
- TIA Portal Native — Full GSD-free integration; hardware catalogue drag-and-drop configuration with automatic address assignment
- Compact 15 mm Pitch — Industry-leading module density; a 64-module station occupies less than 1 m of DIN rail
- Firmware Updateable — Future-proof via online firmware update through PROFINET without hardware replacement
- PROFIenergy — Enables coordinated energy-saving commands across the entire I/O station during machine idle periods
System Architecture & Signal Flow
The IM155-6PN ST occupies the leftmost position of an ET 200SP station mounted on a BaseUnit. The PROFINET controller (e.g., S7-1500 CPU or CM 1542-5) connects to either RJ45 port; the integrated switch forwards the network to the next device in a line topology. The backplane bus carries both power (24 V DC from a Power Module) and high-speed data to all downstream I/O modules. Process signals from field devices terminate on I/O module BaseUnits and are cyclically exchanged with the controller via the IM155-6PN ST at configurable update rates down to 250 µs (IRT mode).
For Shared Device configurations, the station’s I/O modules are partitioned into sub-modules assigned to two separate IO controllers, each with independent access rights and cycle times — enabling safety and standard control on a single physical station.
Sourcing & Quality Verification
- All units sourced from authorised Siemens distribution channels or verified surplus with full traceability documentation
- Each module inspected for firmware version, housing integrity, and connector condition prior to dispatch
- Original Siemens packaging and labelling preserved where available; repackaged units clearly identified
- Certificates of conformity and test reports available upon request for project documentation
- Counterfeit-risk screening applied: hologram verification, PCB marking check, and functional power-on test
Procurement Process
- Step 1 — Enquiry: Submit your order number (6ES7155-6AA01-0BN0), required quantity, and delivery timeline via the contact form or email below
- Step 2 — Quote: Receive a formal quotation with unit price, lead time, and shipping options within 24 business hours
- Step 3 — Order Confirmation: Approve the quotation; proforma invoice issued for payment processing
- Step 4 — Dispatch: Modules shipped with tracking, commercial invoice, and packing list; export documentation provided for international orders
- Step 5 — After-Sales: 12-month warranty on all supplied units; technical support available via email and phone
Technical FAQ
Q: Is the BA 2×RJ45 bus adapter included?
A: Yes. The 6ES7155-6AA01-0BN0 is supplied with the BA 2×RJ45 bus adapter pre-installed as standard.
Q: Which TIA Portal version is required?
A: TIA Portal V13 SP1 minimum; V16 or above recommended for full PROFIenergy and Shared Device feature support.
Q: Can this module work with S7-300/400 controllers?
A: No. The IM155-6PN ST is designed exclusively for PROFINET IO controllers (S7-1200, S7-1500, WinCC-based soft PLCs). S7-300/400 PROFIBUS masters require the IM155-5DP series instead.
Q: What is the maximum station length?
A: Up to 64 I/O modules per station, with a maximum backplane bus length determined by the cumulative current draw of all modules (max. 10 A on the 24 V bus segment).
Q: Is IRT (Isochronous Real-Time) supported?
A: Yes. IRT is supported with a minimum send clock of 250 µs, suitable for motion control and high-speed synchronisation applications.
Q: Can I use this module in a ring topology for redundancy?
A: Yes. The integrated 2-port switch supports MRP (Media Redundancy Protocol) ring topology with switchover times < 200 ms.
Q: What certifications does this module carry?
A: CE, UL, cULus. ATEX Zone 2 suitability is achieved when installed in an appropriately certified enclosure per Siemens installation guidelines.
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