This XCSB Key Operated Safety Switch for guard doors with unlocking by pushbutton has an adjustable turret head and a robust red coated Zamak body with a 1/2" NPT cable gland entry, allowing for flexible installation. It has 2 normally open and 1 normally closed break-before-make (slow break) contacts. Its B10D reliability data is 3 000 000. Its IP67 degree of protection makes it ideal for heavy duty use in harsh conditions. It also complies with EN/ISO 14119, EN/IEC 60204-1, EN/IEC 60947-5-1, UL 508, CSA C22.2 No 14 standards. When associated and correctly connected to an appropriate safety control unit, it conforms to Category 4, performance level PL e, SIL 3 as described in EN/ISO 13849-1, EN/IEC 61508.