The SIMATIC CP1625 is the production-grade PROFINET IRT network interface card for industrial PCs. Built on the Siemens SOC-1 Ethernet Real-Time ASIC, it delivers deterministic real-time communication through two RJ45 ports with an integrated 2-port switch — plug it into a PCIe X1 slot, install the driver, and the card handles PROFINET IRT at hardware level with no additional configuration. It is the recommended interface for SIMATIC Software Controller CPU 1500S deployments on IPCs.

How does the CP1625 work with the Software Controller?

The CP 1625 pairs with the S7-1500 Software Controller CPU 1507S (F) running on the host IPC. The PROFINET stack executes on the CP 1625's SOC-1 ASIC independently of the PC operating system, ensuring deterministic cycle times and real-time behavior even under fluctuating host CPU load. Configuration is handled entirely within TIA Portal V15 Update 1 or later — the card appears as a PROFINET interface in the hardware configuration, and the integrated 2-port switch allows line, star, or ring topologies without an external switch.

What is the difference between the CP1625 and the CP1625-DEV?

Both cards share the same SOC-1 ASIC and dual-port PROFINET IRT capability, but they serve different roles:

• CP1625 (6ES7648-2CF10-1AA0): Production-ready, PCIe bus-powered, plug-and-play. No external connectors beyond the two RJ45 ports. Use this for deployed systems.
• CP1625-DEV (6ES7648-2CF10-1BA0): Developer board with exposed UART headers, external 24 V DC power option, boot and reset configuration jumpers, and a PROFINET certification test interface (X602). Use this for controller development and conformance testing.

If you are deploying a standard Software Controller application on an IPC, the CP1625 is the correct choice. If you are designing a custom PROFINET controller that will eventually run on dedicated hardware, start with the CP1625-DEV.

Frequently Asked Questions

Can I use more than one CP1625 in the same IPC?

No. The CP 1625 driver supports a maximum of one card per PC. If you need additional PROFINET interfaces, consider using a software-based controller on a separate network segment.

Does the CP1625 require an external power supply?

No. The CP1625 draws all required power from the PCIe bus (3.3 V DC). No external power connection is needed — this is one of the key differences from the CP1625-DEV, which offers an external 24 V DC input for standalone operation.