Flat type safety relays (double contact) SF RELAYS Double contact type FEATURES 1. High contact reliability High contact reliability is achieved through the use of a double contact. 2. Forced operation contacts N.O. and N.C. side contacts are connected through a card so that one interacts with the other in movement. In case of a contact welding, the other keeps a min. 0.5mm .020inch contact gap. 3. Independent operation contacts (4 Form A 4 Form B) There are 4 points of forced operation contacts. Each pair of contacts is free from the main armature and is independent from each other. So if a N.O. pair of contacts are welded, the other 3 N.O. contacts are not effected (operate properly) That enables to plan a circuit to detect welding or go back to the beginning condition. 4. Separated chamber structure N.O. and N.C. side contacts are put in each own space surrounded with a card and a body-separater. That prevents short circuit between contacts, which is caused by their springs welding or damaged. 2 Form A 2 Form B 4 Form A 4 Form B RoHS compliant 5. High breakdown voltage High breakdown voltage 2,500 Vrms between contacts and coil. 6. High sensitivity Realizes thin shape and high sensitivity (500 mW nominal operating power) by utilizing high-efficiency polarized magnetic circuit with 4-gap balanced armature. 7. Complies with safety standards Standard products are UL, CSA, TÜV and SEV certified. Conform to European standards. TÜV certified. Complies with SUVA European standard. TYPICAL APPLICATIONS 1. Industrial equipment such as presses and machine tools 2. Elevators and other kinds of hoisting mechanisms, conveyor equipment. ORDERING INFORMATION SF D Contact arrangement 2: 2 Form A 2 Form B 4: 4 Form A 4 Form B Nominal coil voltage DC 5, 12, 24, 48, 60V Note: Certified by UL, CSA, TÜV and SEV TYPES Contact arrangement 2 Form A 2 Form B 4 Form A 4 Form B Nominal coil voltage 5V DC 12V DC 24V DC 48V DC 60V DC 5V DC 12V DC 24V DC 48V DC 60V DC Part No. SF2D-DC5V SF2D-DC12V SF2D-DC24V SF2D-DC48V SF2D-DC60V SF4D-DC5V SF4D-DC12V SF4D-DC24V SF4D-DC48V SF4D-DC60V Standard packing: Carton: 20 pcs.; Case: 200 pcs. –1– ASCTB120E 201408-T














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