Siemens Simatic CP 443-1 RNA communications processor

The Simatic CP 443-1 RNA communications processor utilises the Parallel Redundancy Protocol (PRP) in accordance with the IEC 62439-3 standard to facilitate high-availability network connections for the Simatic S7-400 controller. It features two RJ45 ports for connecting two parallel industrial ethernet networks. The CP 443-1 RNA doubles the frame and feeds it into the two connected networks. The network access point on the receiver side relays the first incoming frame to the addressees and discards the later frame.

Simatic CP 443-1 RNA is designed for use in process industry plants and power generation and distribution applications. The communications processor supports open communication via TCP/IP, UDP and the ISO transport protocol as well as S7, PG/OP and S7 H communication for S7-400 H systems. Data can be transmitted in full- or half-duplex mode in bandwidths of 10 or 100 Mbps. The user can view diagnostics information via SNMP, STEP 7 or the web server of the communications processor.

In addition, the Simatic CP 443-1 RNA has a third ethernet interface with restricted functional scope. On the basis of the ISO transport protocol, the port supports S7 communication services only, all others are deactivated. Fewer functions mean less testing overhead and lower qualification costs. All Simatic CP 443-1 RNA functions are configured with STEP7 engineering software, V5.5 SP2 or higher and the hardware support package included in the scope of delivery.