Siemens IM 155-6 PN ST ET 200SP Interface Module 6ES7155-6AU02-0BN0

Overview

The Siemens IM 155-6 PN ST, order number 6ES7155-6AU02-0BN0, is the standard PROFINET interface module of the SIMATIC ET 200SP I/O system. It forms the head of an ET 200SP station: it connects the station to the PROFINET network, exchanges process data with the controller and manages up to 32 ET 200SP I/O modules plus up to 16 ET 200AL modules. This 6AU02 version is the current successor to 6ES7155-6AU01-0BN0 and adds multi hot swap, optional PROFINET strain relief, larger address space and PROFINET Security Class 1 support.

Seven Star LLC supplies the Siemens IM 155-6 PN ST to panel builders, EPC contractors and maintenance teams in the Sultanate of Oman and across the GCC. Our team in Muscat helps you select the matching BusAdapter, BaseUnits and I/O modules for the station, and checks firmware and engineering compatibility when the module replaces an earlier interface in a running plant.

How the Siemens IM 155-6 PN ST Works

In operation the Siemens IM 155-6 PN ST acts as a PROFINET IO device. The controller, for example an S7-1500 CPU, sends output data and receives input data cyclically, and the Siemens IM 155-6 PN ST passes this data over the ET 200SP backplane bus to the I/O modules on their BaseUnits. Each module can use up to 288 bytes of input and output data, the station as a whole up to 1,440 bytes, and up to 256 submodules can be addressed. Diagnostics from every module are collected by the head and reported to the controller as alarms, with RUN, ERROR, MAINT and PWR LEDs on the front for local checks.

On the Siemens IM 155-6 PN ST, the PROFINET connection is made through a plug-in BusAdapter, available as BA 2x RJ45, BA 2x FC or BA 2x M12, which gives two ports on an integrated switch for line or ring topologies at 100 Mbit/s full duplex. The Siemens data sheet lists IRT with update times from 1 ms to 4 ms at 125 µs intervals, Dynamic Frame Packing, fast forwarding and fragmentation, prioritized startup, PROFIenergy and shared device operation with up to four IO controllers. Media redundancy is supported through MRP and MRPD, and PROFIsafe is supported for safety I/O, while PROFINET system redundancy (S2 and R1) is not available on this standard variant.

Engineering Design of the Siemens IM 155-6 PN ST

The Siemens IM 155-6 PN ST module measures 50 mm wide, 117 mm high and 74 mm deep and weighs about 120 g without the BusAdapter. It is supplied from 24 V DC within 19.2 V to 28.8 V, with reverse polarity and short-circuit protection, a rated current of 350 mA, a maximum of 450 mA and a typical power loss of 1.8 W. PROFINET is isolated from all other circuits with 1,500 V AC (type test), and the module tolerates mains interruptions of up to 10 ms.

The data sheet gives an operating range of −30 °C to 60 °C for horizontal mounting and −30 °C to 50 °C for vertical mounting, without condensation, and installation altitudes up to 5,000 m with restrictions above 2,000 m. Firmware V6.4.0 is configured in STEP 7 TIA Portal from V20, in STEP 7 V5.7 SP3 or through GSDML V2.45. Signed firmware updates, data integrity protection and secure data removal support the PROFINET Security Class 1 rating, which matters for operators following IEC 62443 practices.

Key Features of the Siemens IM 155-6 PN ST

The points below summarise what the Siemens data sheet states for the Siemens IM 155-6 PN ST.

• Up to 32 ET 200SP I/O modules and 16 ET 200AL modules per station, with up to 256 submodules.
• Multi hot swap, so several I/O modules can be replaced during operation without stopping the station.
• Two PROFINET ports through a choice of RJ45, FastConnect or M12 BusAdapters with an integrated switch.
• IRT from 1 ms, Dynamic Frame Packing, fast forwarding and fragmentation for deterministic communication.
• MRP and MRPD media redundancy for ring networks, with network loading class 3.
• Shared device operation with up to four IO controllers, plus local coupling of IO data.
• PROFIsafe support for fail-safe ET 200SP modules within the same station.
• Supplied with the server module 6ES7193-6PA00-0AA0 that terminates the station.

Industrial Applications

A compact ET 200SP station built around the Siemens IM 155-6 PN ST is often the most practical way to bring signals from the field into a controller located elsewhere. Typical examples in Oman include remote I/O cabinets on water pumping stations and reservoirs, wellhead and manifold panels in oil and gas fields, I/O stations on desalination trains, and marshalling cabinets in power and utility substations, where the station sits close to the instruments and only a PROFINET cable returns to the control room.

Because the Siemens IM 155-6 PN ST tolerates up to 60 °C in horizontal mounting and supports MRP rings, it suits shaded field cabinets and plant rooms in Muscat, Sohar, Duqm and Salalah where long cable runs and network availability are concerns. Seven Star LLC supplies the Siemens IM 155-6 PN ST with engineering support in Muscat, together with I/O such as the Siemens ET 200SP DI 16x24VDC ST input module, the wider SIMATIC ET 200SP system and Siemens IE TP cords for the network connection.

Technical Specifications

The table lists the key Siemens IM 155-6 PN ST data from the Siemens data sheet for 6ES7155-6AU02-0BN0; please confirm BusAdapter and BaseUnit selection with our team.

How to Order

To order the Siemens IM 155-6 PN ST, tell Seven Star LLC how many stations you are building, which BusAdapter type your cabling uses and which I/O modules each station carries. We will quote the complete station, confirm stock and delivery to Oman and the GCC, and you can download the Siemens data sheet from this page.

It pairs with controllers and network hardware such as the Siemens CPU 1515-2 PN and Siemens SCALANCE XC208 switch.