Siemens 6DL1155-6AU00-0PM0 — SIMATIC ET 200SP HA PROFINET Interface Module IM155-6 PN | 56 I/O | Multi-Hot Swap | 24V DC | New Original

Important note for anyone arriving from a search for "analog input module": The 6DL1155-6AU00-0PM0 is not an analog input module. It is the PROFINET interface module (IM) for SIMATIC ET 200SP HA distributed I/O stations — the component that connects the entire I/O station to the PROFINET network and manages communication between the controller and all I/O modules mounted in the same station. Analog input modules for ET 200SP HA carry different order numbers in the 6DL1134 family. If you need an analog input module specifically, please verify the part number before ordering.

That said, the IM155-6 PN HA is itself a critical and frequently sourced component — it's the active brain of every ET 200SP HA station, and a failed or missing IM brings the entire I/O drop offline.

✅ Genuine Siemens. New original, factory sealed. Country of origin: Germany.

Order Number Decoded — 6DL1155-6AU00-0PM0

6DL — SIMATIC ET 200SP HA product family. As established across the 6DL product range, this prefix identifies the High Availability variant of ET 200SP — the process automation series with extended temperature, hazardous area certification, and high-availability redundancy support. All 6DL components are exclusive to ET 200SP HA and are not cross-compatible with standard ET 200SP (6ES7 prefix).

1155 — Interface module sub-family. Within the 6DL family, "1155" designates IM (Interface Module) components — specifically the PROFINET interface modules that serve as the station master and PROFINET IO device. This distinguishes them from I/O module families: 1131 (digital I/O), 1134 (analog input), 1135 (analog output), 1136 (fail-safe I/O).

6AU00 — Module type and variant. "6A" indicates the IM 155 generation within the 1155 sub-family. "U" and "00" identify this as the standard PN (PROFINET) HA variant.

0PM0 — Configuration and feature variant. "P" indicates the multi-hot swap capability — the defining functional characteristic of this module compared to other IM variants. "M" indicates the module is supplied without a server module (the server module is included with the carrier module, e.g., 6DL1193-6BH00-0SM0, so it is not duplicated here). "0" is the standard version suffix.

The "0PM0" vs "0EM0" distinction is the most important variant difference within the IM155-6 PN HA family:

0PM0 (this module) — supports multi-hot swap: multiple I/O modules can be inserted or removed simultaneously while the station remains operational
0EM0 — supports only standard hot swap (one module at a time); also firmware V1.0 vs V1.1 for 0PM0

Technical Specifications

Parameter	Specification
Order Number	6DL1155-6AU00-0PM0
Product Type	IM 155-6 PN HA (PROFINET Interface Module)
Product Family	SIMATIC ET 200SP HA
Firmware Version	V1.1
HW Functional Status	FS03
Vendor ID (PROFINET)	02AH
Device ID (PROFINET)	030FH
Max. I/O Modules per Station	56
Hot Swap	Multi-hot swap (multiple modules simultaneously)
Server Module Included	No (supplied separately with carrier module)
PROFINET Protocol	PROFINET IO Device
Open IE Communication	Yes (TCP/IP)
MRP	Yes (as MRP client)
Supply Voltage (rated)	24V DC
Supply Voltage (min.)	19.2V DC
Address Space per Module (max.)	256 bytes
Address Space per Station (max.)	1,440 bytes (R1 and S1 without CiR)
Width	50 mm
Height	138 mm
Depth	89 mm
Weight	0.22 kg
Protection Rating	IP20
ATEX Classification	Cat. 3G (Zone 2 gas explosion protection)
I&M Data	I&M0 to I&M3
BusAdapter Slot	Yes (requires separate BusAdapter, e.g., 6DL1193-6AR00-0AA0)
Country of Origin	Germany
Certifications	ATEX Cat. 3G, China RoHS
Condition	New Original / Factory Sealed

What an Interface Module Does — The IM's Role in an ET 200SP HA Station

Understanding the IM's function clarifies why it's the most important component in the station and why sourcing a genuine replacement promptly is so critical when one fails.

In an ET 200SP HA station, the IM155-6 PN HA performs three functions simultaneously:

1. PROFINET IO Device. The IM is the station's identity on the PROFINET network. It has its own PROFINET device name (assigned during commissioning in TIA Portal or SIMATIC Manager), its own IP address, and its own device identifier (DeviceID 030FH for this variant). The PROFINET IO controller — an S7-1500, S7-300 with CP, or PCS 7 system controller — communicates with the IM, which in turn manages all I/O module data exchange. Without the IM, the station has no network presence.

2. Backplane bus master. The IM manages the internal backplane bus that connects it to all I/O modules mounted in the station. It polls each I/O module's data, assembles the process image, and handles module diagnostics. This includes detecting module insertion and removal, generating diagnostic messages for failed or missing modules, and managing the parameterization of newly inserted modules.

3. Station power and configuration management. The IM monitors station supply voltage and distributes configuration parameters downloaded from TIA Portal/SIMATIC Manager to each I/O module. I&M data (Identification & Maintenance, I&M0 to I&M3) stored in the IM provides electronic nameplate information accessible for asset management and configuration comparison.

Multi-Hot Swap — What "0PM0" Enables vs Standard Hot Swap

The "P" in the 0PM0 suffix identifies the multi-hot swap capability, and this distinction has real operational implications for process plants that need to maintain I/O availability during maintenance.

Standard hot swap (single module): You can remove and replace one I/O module while the station remains running, but only one at a time. The IM handles the removal of one module, updates the process image with the missing module status, and re-integrates the replacement module before the next module can be touched.

Multi-hot swap (0PM0): Multiple I/O modules can be removed and re-inserted simultaneously — or in any sequence without waiting for each module's re-integration cycle to complete before the next is touched. In a 56-module station, this means maintenance teams can perform multi-point maintenance (replacing several failed or suspect modules in one pass) without the staged waiting periods required by single hot swap.

For process plants running continuous operations — refineries, chemical plants, power stations — the ability to perform multi-module maintenance during a brief planned opportunity window, rather than having to execute individual replacements with waiting intervals between each, directly reduces the duration of maintenance-mode operation and the associated process control risk.

The 0PM0 variant represents Siemens' current recommended IM for ET 200SP HA stations. The earlier 0EM0 variant (firmware V1.0, single hot swap) remains compatible where installed but lacks multi-hot swap capability.

System Configuration Requirements — What Else You Need

The 6DL1155-6AU00-0PM0 is the active brain of the station, but it ships without the infrastructure components needed for a complete installation. A complete ET 200SP HA station requires:

Carrier module — The IM mounts into a carrier module, which provides the mechanical housing and backplane bus connection. For a standard (non-redundant) IM configuration: 6DL1193-6BH00-0SM0 (single carrier, includes server module). For a redundant IM configuration with two IMs: 6DL1193-6BH00-0RM0 (redundant carrier).

BusAdapter — The IM has no built-in PROFINET connector. A BusAdapter must be plugged onto the IM front to provide the physical PROFINET port. The standard copper option is 6DL1193-6AR00-0AA0 (BA 2xRJ45). Fiber optic options are available for long-distance or high-EMC installations.

Mounting rail — ET 200SP HA stations mount on Siemens-specific HA mounting rails (6DL1193-6MC00-0AA0 for 482mm/19" rack format, or 6DL1193-6MD00-0AA0 for 500mm format), not standard DIN rail.

I/O modules and terminal blocks — Up to 56 I/O modules (6DL1131, 6DL1134, 6DL1135, 6DL1136 families) can be mounted per station, each requiring a matching terminal block for field wiring.

TIA Portal with WinCC (for S7-1500 systems) or SIMATIC Manager/PCS 7 — The IM is configured through Siemens engineering software. Confirm the software version compatibility with the IM's firmware V1.1 before programming.

Compatible Controllers and Engineering Software

The IM155-6 PN HA is designed for Siemens process automation system controllers:

S7-1500 and S7-1500 HA — The primary target platform for new ET 200SP HA installations. S7-1500 HA paired controllers provide both controller and I/O redundancy when combined with redundant IM configurations. Engineering via TIA Portal V15 or later.

SIMATIC PCS 7 — The IM is supported in PCS 7 systems using S7-400H/FH redundant controllers with PROFINET. The 0PM0 variant requires PCS 7 V9.0 or later (confirm against the Siemens compatibility matrix for the specific PCS 7 version in use). Engineering via SIMATIC Manager.

SPPA-T3000 — Siemens' turbine and power plant control system. The 0PM0 variant can be configured from SPPA-T3000 version as specified in the equipment manual.

Note on 6DL1155-6AU00-0EM0 compatibility: If you're expanding an existing ET 200SP HA installation that uses 0EM0 interface modules, the 0PM0 is compatible in the same station (both run on the IM155-6 PN HA hardware generation) but operates independently — each IM manages its own station. Mixing 0PM0 and 0EM0 in different stations on the same PROFINET network is supported.

Typical Applications

Offshore oil and gas platforms — ET 200SP HA I/O stations in Zone 2 classified process areas. The ATEX Cat. 3G certification on the IM (confirmed from product data) makes it suitable for Zone 2 gas-classified locations. Each platform I/O drop requires one IM per station, making the IM a high-priority spare item.

Onshore refineries and petrochemical plants — PROFINET I/O drops in process units within PCS 7 DCS systems. Large refineries may have dozens to hundreds of ET 200SP HA stations, each containing one IM. The multi-hot swap capability of 0PM0 supports maintenance without shutting down the I/O station.

Power generation plants — S7-1500 HA control systems for turbine control, boiler instrumentation, and BOP (balance of plant), where the HA series provides the process-grade reliability required for continuous generation operation.

Chemical and specialty chemical plants — PROFINET-based distributed I/O for batch reactors, distillation columns, and process utility systems, where the extended temperature range and hazardous area certification of the ET 200SP HA series qualify the hardware for direct installation in process areas.

LNG terminals and gas processing — Control and monitoring systems where both Zone 2 certification and the extended –40°C cold-start capability (verified for ET 200SP HA carrier components; confirm IM operating range from full datasheet for cold-climate installations) support direct installation in cold-climate classified process areas.

❓ FAQ — Siemens 6DL1155-6AU00-0PM0

Q1: The product listing says "analog input module" — is that correct?

No — this is an error in the product title. The 6DL1155-6AU00-0PM0 is the PROFINET Interface Module (IM155-6 PN HA) for SIMATIC ET 200SP HA stations. It is not an analog input module of any kind. Analog input modules for ET 200SP HA are in the 6DL1134 product family (e.g., 6DL1134-6GF00-0PH1 for the AI 8x U/I HA module). The IM155-6 PN provides the PROFINET network connection for the entire I/O station and manages communication between the PROFINET IO controller and all I/O modules in the station. If you need an analog input module specifically, please verify the complete order number of the module currently installed in your system before ordering.

Q2: What's the difference between 0PM0 and 0EM0 — which should I order?

Both are IM155-6 PN HA interface modules. The 0PM0 (this module, firmware V1.1) supports multi-hot swap — you can insert or remove multiple I/O modules simultaneously while the station operates. The 0EM0 (firmware V1.0) supports only single module hot swap — one module at a time, with a waiting interval between each. For new installations and replacements, 0PM0 is the current version and is recommended by Siemens. For existing installations using 0EM0, replacing with 0PM0 is supported — the hardware generation is the same, and the 0PM0 operates correctly in the same station configuration. The DeviceID differs (030FH for 0PM0 vs 0309H for 0EM0), which is relevant if you're replacing an 0EM0 in an existing TIA Portal or PCS 7 project — the project hardware configuration may need to be updated to reflect the new module variant.

Q3: This IM comes without a server module — what does that mean, and what do I need to order?

The server module is a passive plug that terminates the ET 200SP HA backplane bus and is required for the station to function. For the 6DL1155-6AU00-0PM0, the server module is included with the carrier module — specifically the single carrier (6DL1193-6BH00-0SM0) or redundant carrier (6DL1193-6BH00-0RM0). So the complete IM installation requires: (1) this IM (6DL1155-6AU00-0PM0); (2) a carrier module (which includes the server module); (3) a BusAdapter for the PROFINET connection; (4) mounting on an ET 200SP HA mounting rail. The IM itself does not contain a server module slot — the carrier module provides the server module slot and supplies the server module.

Q4: What is the maximum number of I/O modules I can connect to one IM155-6 PN HA station?

The IM155-6 PN HA supports a maximum of 56 I/O modules per station. This is a hard limit defined by the backplane bus architecture and the station's address space (maximum 1,440 bytes per station for R1 and S1 configurations without CiR). In practice, the actual number of I/O modules depends on the total address space consumed — modules with more channel density use more address space per module. For stations with many high-density analog modules (which use more address bytes), the address space limit may be reached before the 56-module slot limit. Plan the station I/O count against both the module slot limit and the total address space constraint.

Q5: Does this IM support PROFINET Media Redundancy Protocol (MRP) for ring topology?

Yes, the IM155-6 PN HA supports MRP as an MRP client — confirmed in the ET 200SP HA Equipment Manual (A5E39262148-AE). This means the IM can participate in a PROFINET ring topology where a media break (cable failure) anywhere in the ring triggers automatic rerouting of network traffic. The ring manager (typically the PROFINET IO controller or a SCALANCE managed switch configured as MRP manager) coordinates the ring topology; each IM operates as an MRP client. For high-availability PROFINET installations where a single cable break must not isolate any I/O station, ring topology with MRP is the appropriate network design, and the BA 2xRJ45 BusAdapter's two-port switch enables the ring connection at each station.

Q6: Can I use this IM with a standard (non-HA) S7-1500 controller, or does it require an S7-1500 HA system?

The IM155-6 PN HA can be used with standard S7-1500 controllers as a PROFINET IO device — it doesn't require an S7-1500 HA (high-availability paired controller) system. The "HA" in the module name refers to the module's own design features (extended temperature, hazardous area certification, multi-hot swap, redundancy capability) rather than a requirement for HA controller hardware. In a standard S7-1500 + standard ET 200SP installation, you would normally use standard ET 200SP hardware (6ES7 prefix). The reason to use ET 200SP HA in a standard S7-1500 application would be if the I/O station needs the extended temperature range or hazardous area certification that only ET 200SP HA provides, while the controller-side redundancy is not required.

Q7: How do I configure this IM in TIA Portal, and what software version is required?

The IM155-6 PN HA (0PM0, firmware V1.1) is configured in TIA Portal as an ET 200SP HA IO device. In TIA Portal's hardware catalog, navigate to PROFINET IO → ET 200SP HA → Interface Modules and select IM155-6 PN HA. The minimum TIA Portal version for this specific variant should be confirmed against Siemens' product compatibility matrix — based on the equipment manual (09/2021) firmware V1.1 requirement, TIA Portal V16 or later is generally appropriate, but verify the exact minimum version from Siemens Industry Online Support for your specific project configuration. For PCS 7 projects, the IM is configured in SIMATIC Manager using the ET 200SP HA hardware catalog entry. Once configured, the IM appears as a PROFINET IO device in the network view, and its I/O modules are added in the device view within the station structure.

6DL1155-6AU00-0PM0 Brand New 6DL11556AU000PM0 1PC Siemens Analog Input Module