Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Module model | 505-CP2572 |
| Siemens ordering number | PPX:505-CP2572 |
| Manufacturer | Siemens |
| PLC family | SIMATIC TI 505 |
| Product type | Ethernet TCP/IP communications processor |
| Ethernet standard | IEEE 802.3 |
| Transmission rate | 10 Mbps |
| Ethernet interface 1 | 10BaseT, 8-pin RJ45 |
| Ethernet interface 2 | AUI, female DB15 |
| Serial interface 1 | RS-232C subset, male DB9, DTE |
| Serial interface 2 | RS-422, female DB9 |
| Supported protocols | TCP/IP, CAMP, NITP |
| Operating modes | Client, server, serial redirect |
| Compatible CPU families | 525, 535, 545, 555, 565 and 575 |
| Backplane supply | +5 VDC |
| External AUI supply | +12 VDC |
| Backplane power consumption | 6 W without AUI |
| AUI power consumption | 0.5 W with standard AUI |
| Module format | Double Eurocard |
| Rack space | One slot |
| Dimensions (W × H × D) | 20 × 266 × 170 mm |
| Weight | Approximately 0.3 kg |
Specifications are based on Siemens SIMATIC NET documentation.
Product Introduction
Siemens 505-CP2572 Ethernet Communications Processor
The Siemens 505-CP2572 is an Ethernet TCP/IP communications module designed for SIMATIC TI 505 programmable logic controllers. Installed directly in a basic or expansion rack, it provides network connectivity through 10BaseT Ethernet or an AUI interface. The module supports communication with other network devices, including remote PLCs and supervisory computers.
505-CP2572
Its client, server, and serial-redirection functions support PLC data exchange, remote programming, and supervisory access. The module also provides two serial ports for programming and configuration tasks, making it useful in established control networks that still depend on the Series 505 architecture.
Application Scenarios & Field Pitfalls
The 505-CP2572 is used where an existing SIMATIC 505 PLC installation needs Ethernet communication without replacing the entire controller architecture. Its 10 Mbps design is a significant consideration when connecting legacy equipment to modern industrial networks.
Typical application scenarios
- Connecting Series 505 PLCs to plant Ethernet networks.
- Transferring PLC data to supervisory computers and monitoring systems.
- Remote PLC programming and maintenance over TCP/IP.
- Serial redirection between programming devices and other PLC network nodes.
Field-engineering precautions
- Check network speed and infrastructure. The CP2572 is a 10 Mbps Ethernet module. Modern switches may support backward compatibility, but network configuration, port negotiation, and industrial network traffic must be checked.
- Verify the IP configuration. The module’s IP address may be loaded through PLC logic or stored in its EEPROM. Siemens documentation warns that an EEPROM-configured replacement may require reprogramming before it can communicate correctly.
- Confirm the physical interface. The module supports RJ45 10BaseT and DB15 AUI connections. The AUI interface may require a compatible external transceiver and appropriate power.
- Check protocol requirements. Confirm whether the application uses CAMP, NITP, TCP/IP, or serial redirection. A working Ethernet link alone does not prove that the required PLC communication service is operating.
- Review network loading. Legacy modules were designed for earlier, lower-traffic Ethernet environments. CTI has documented intermittent communication problems associated with increased network traffic and recommends evaluating the newer 2572-B for applicable installations.
Related Products
- CTI 2572-B — Newer Ethernet communications module identified as a replacement for the 505- in most applications. It supports faster network environments; verify application-specific compatibility before substitution.
- CTI 2572 — Earlier CTI Ethernet TCP/IP adapter with a related role in TI 505 systems. Confirm the exact hardware revision and firmware.
- CTI 2572-A — Related Ethernet adapter supported by common SIMATIC/TI 505 communication drivers. Check configuration and application compatibility.
- Siemens 505-CP1434-TCP — Ethernet host communications module for compatible Series 505 installations; it is a different communications product and should not be treated as a direct replacement.
- Siemens 505-8132-1 — Reference manual for the 505-, useful for installation and configuration work.
- Siemens 505-545 / 555 / 565 CPU families — Controller families supported by the ; confirm the exact installed CPU and rack arrangement before procurement.
Procurement note: Siemens lists the 505- as discontinued. For a replacement, request the module’s label and revision, a clear view of the RJ45 and AUI connectors, evidence of Ethernet communication testing, and confirmation that its IP and PLC communication configuration can be restored. A CTI 2572-B may be a practical modernization option, but it should be validated against the actual PLC program and network architecture before installation.
