Vote for this product, until August 23rd, 2019 (see category A, company Ross Controls)
The CC4 is a redundant 4/3 pneumatic Poppet valve for safe stop/load holding and safety control of pneumatic actuators. The position sensors need to be monitored externally. Depending on the installation, Cat. 4, PL e can be reached in accordance to DIN EN ISO 13849-1. The CC4 can replace an existing solution for safe stop/load holding and safety control of pneumatic actuators (e.g. IFA-Report Functional Safety, 2017, page 185, example 25, Kat. 3, PL e) of a minimum of five valves and two pressure sensors with only one valve and two position sensors, the safety rating is going up from Cat. 3, PL e to Cat 4 PL e. By reducing the components, integration and troubleshooting will be much easier; also leakage points are reduced. The IFA solution only monitors the pneumatic actuating signals, but not the position of the check valves 2V2/2V2 and the position of 1V1.