The E48 DIN-Style Safety Key Interlock Limit Switch is designed to be used with movable guards or covers which must be closed for operational safety. The key portion of the switch is affixed to the movable door, cover or other such guard. The switch itself is mounted to a rigid portion of the machine. When the guard is opened, the key is removed from the switch, thereby positively breaking the normally closed contacts. This interrupts the control circuit, stopping machine operation.
SPECIFICATIONS Ambient Temperature: Operation and Storage: -30 to 70°C (-22 to 158°F) minimum temperature is based upon absence of freezing water or moisture Enclosure Ratings: NEMA 4, IP65 (indoor only) conforming to IEC 529. Care must be taken that contaminants do not enter the actuating key area as this may prevent the switch from performing to specifications Ambient Humidity: 95% maximum, non-condensing Weight: 76 (0.17 lb) Housing Material: Synthetic resin Vibration Resistance: 10 G in both vertical and horizontal axis (from 10 to 500 Hz) conforming to IEC 68-2-27 Shock Resistance: 30 G in both vertical and horizontal axis conforming to IEC 68-2-27 Mechanical Life: 1 million operations minimum Electrical Life: 150,000 operations minimum Short Circuit Protection Recommended: 10 A fuse (type gl or gG) (IEC 269) Rated Insulation Voltage: 400 V (EN 60947-5-1) Electric Shock Protection: Insulation Class II (IEC 536) Operating Force (extraction): 14.7 N (3.30 lbƒ) Release Force (insertion): 29.4 N (6.60 lbƒ) Total Travel: 1.10" minimum (28 mm) Pretravel: 0.24 ± 0.10" minimum (6 ± 3 mm) Direct Opening Force: 58.8 N (13.2 lbƒ) minimum Operating Speed: 0.04 to 20 inches/second (1 to 500 mm/second) Operating Frequency: 30 operations/minute maximum UL Listed: File 76675 Europe Compliance: EN 609478-5-1 Direct-opening N C contacts per EN 60947-5-1 Double insulation TUV Rheinland: Approved Contacts: 1 NO/1 NC DPDB 2 NC DPDB