VDE0660, IEC947-5-1. UL, CSA. Standard Limit Switch Body / LED (ZCKJ). Telemecanique OsiSense XCKJ series limit switch bodies allow complete limit switch assemblies to be constructed using ZCKE/Y limit switch heads and actuators. Features and Benefits. Snap action contacts with positive opening operation -25 to +70°C operating temperature Protected to IP66 Robust metal body