Siemens 6GK1161-3AA00 Replacement for CP 1613 A2 PROFINET

Product Overview

Siemens 6GK1161-3AA00 Replacement for CP 1613 A2 PROFINET: Seamless Transition & Legacy System Upgrade

The Siemens 6GK1161-3AA00 is a PCI-based PROFINET communication processor belonging to the CP 1613 A2 product family within the SIMATIC NET portfolio. As industrial facilities worldwide accelerate their migration away from aging PC-based PROFINET controllers and legacy SIMATIC S5/S7 communication architectures, the 6GK1161-3AA00 has become a critical bridge component — enabling engineers to maintain PROFINET IO connectivity on existing PCI-slot industrial PCs while planning a phased transition to modern communication infrastructure.

At TOPNLMS, we stock verified replacement and upgrade units of the 6GK1161-3AA00 to support your retrofit projects, emergency spare requirements, and planned system modernization programs. Every unit ships with a 12-month warranty, pre-shipment functional testing, and full documentation support.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration to or around the 6GK1161-3AA00 rarely involves a single component swap. In practice, field engineers encounter a broader ecosystem of interdependent hardware that must be evaluated and, in many cases, simultaneously upgraded to ensure system stability and protocol compatibility.

When replacing a first-generation CP 1613 with the 6GK1161-3AA00, the most common adjacent change involves updating the SOFTNET-PNIO driver stack on the host industrial PC. Systems previously running SIMATIC NET PC Software V6.x or V7.x will require an upgrade to a compatible SIMATIC NET PC Software edition that supports the A2 hardware revision. This is particularly relevant in SCADA and MES environments where the PC-based PROFINET controller interfaces directly with SIMATIC S7-300 or S7-400 PLCs via the CP 343-1 or CP 443-1 communication modules mounted in the PLC rack.

In distributed I/O architectures, the 6GK1161-3AA00 typically connects to PROFINET IO devices such as the ET 200S, ET 200M, or ET 200SP remote I/O stations. During a retrofit, engineers must verify that the GSD files (GSDML) for these field devices are compatible with the updated PROFINET IO controller version supported by the CP 1613 A2. In many legacy installations, the ET 200M with IM 153-4 PN interface modules was the primary distributed I/O platform, and these remain fully compatible with the 6GK1161-3AA00 operating as a PROFINET IO Controller.

For facilities upgrading from older PC-based communication solutions that relied on CP 5611 or CP 5613 PROFIBUS cards, the migration path to PROFINET via the 6GK1161-3AA00 requires careful attention to the network topology. PROFIBUS DP segments connected to field devices such as SINAMICS G120 or MICROMASTER 440 drives may need to be bridged using a PN/DP coupler or replaced with PROFINET-native drive communication interfaces. In such cases, the SINAMICS G120 with a PROFINET-capable Control Unit (CU240E-2 PN) can be directly integrated into the new PROFINET network managed by the CP 1613 A2, eliminating the need for protocol conversion hardware.

Control cabinet space is another critical consideration. The 6GK1161-3AA00 occupies a standard PCI slot in the industrial PC, which is typically housed in a 19-inch rack-mount enclosure or a panel-mount IPC chassis. When the host IPC itself is being replaced as part of a broader modernization — for example, migrating from a SIMATIC Microbox PC 420 to a newer SIMATIC IPC477E — the PCI slot availability must be confirmed in the new platform’s hardware specification. Some compact IPC platforms offer only PCIe slots, in which case the CP 1613 A2 (PCI) would need to be substituted with the CP 1623 (PCIe) as the appropriate PROFINET communication processor for the new hardware generation.

Power supply compatibility within the control cabinet should also be reviewed. The 6GK1161-3AA00 draws power directly from the PCI bus (3.3 V / 5 V), so no external power connection is required. However, the host IPC’s power supply unit — often a SITOP PSU100S or equivalent — must be sized to accommodate the additional load of the communication card alongside other installed peripherals.

Finally, for applications requiring time-synchronized PROFINET IRT communication — common in motion control systems using SIMOTION D or SINUMERIK CNC controllers — the 6GK1161-3AA00’s IRT support enables precise cycle-time synchronization across the PROFINET network. This capability is particularly valuable when the legacy system used a dedicated PROFIBUS-based motion bus and the upgrade path involves consolidating motion and process communication onto a single PROFINET backbone.

Retrofit Guidance FAQ

Q: Can the 6GK1161-3AA00 directly replace a first-generation CP 1613 without hardware modification?
A: Yes. The CP 1613 A2 (6GK1161-3AA00) uses the same PCI form factor and supports both 3.3 V and 5 V PCI slots, making it a direct physical replacement for the original CP 1613. The driver software must be updated to the corresponding SIMATIC NET PC Software version compatible with the A2 revision.

Q: Is the existing PROFINET network wiring compatible with the 6GK1161-3AA00?
A: Yes. The CP 1613 A2 uses standard RJ45 Ethernet connectors and is fully compatible with Cat5e/Cat6 PROFINET-compliant cabling. The integrated 2-port switch allows daisy-chain or star topology connections without additional network switches for small device counts.

Q: Can I use TIA Portal to configure the 6GK1161-3AA00?
A: Yes. The CP 1613 A2 is supported in TIA Portal via the SIMATIC NET PC Software integration. Legacy STEP 7 (Classic) projects can also be migrated using the TIA Portal migration tool, preserving existing PROFINET IO device configurations.

Q: What happens to my existing PROFINET IO device assignments during the card swap?
A: The PROFINET IO device assignments are stored in the software configuration (STEP 7 / TIA Portal), not in the CP hardware itself. After installing the 6GK1161-3AA00 and updating the driver, the existing configuration can be downloaded to the new card without reconfiguring individual IO devices.

Q: Does the 6GK1161-3AA00 support IRT (Isochronous Real-Time) communication?
A: Yes. Unlike the first-generation CP 1613, the A2 revision supports PROFINET IRT, enabling cycle times down to 250 µs for time-critical applications such as motion control and synchronized I/O processing.

Q: What is the physical installation space requirement?
A: The 6GK1161-3AA00 requires one standard PCI slot (half-length card) in the host industrial PC. No additional DIN rail or cabinet space is needed beyond the IPC enclosure itself.

Warranty Assurance

Every 6GK1161-3AA00 unit supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Our pre-shipment inspection process includes functional power-on testing, interface verification, and visual inspection for physical integrity. Units that fail to meet our quality standards are quarantined and never shipped.

In the event of a warranty claim, TOPNLMS provides a straightforward replacement process: contact our technical support team with your order reference and a description of the fault, and we will arrange a replacement unit dispatch or issue a refund based on your preference. Our average response time for warranty inquiries is within 1 business day.

For procurement teams managing critical spare inventories, we offer batch testing services and can provide test reports upon request. We understand that unplanned downtime in industrial environments carries significant operational cost, and our logistics team is structured to support urgent same-day dispatch for in-stock items to minimize your exposure.

TOPNLMS ships globally from our Xiamen warehouse, with established freight routes to Europe, Southeast Asia, the Middle East, and the Americas. Export documentation, commercial invoices, and packing lists are prepared in compliance with international trade requirements to ensure smooth customs clearance at your destination.

For volume procurement inquiries, OEM partnership discussions, or technical pre-sales consultation on your specific retrofit project, please contact our industrial automation team directly.