Low profile safety relay with forcibly guided double contacts SFN4D RELAY 3.3 33.0 FEATURES Relay complies with EN 020, Type B. Polarized magnet system with snap action function Tolerance ±0.3 mm Weight approx. 42 g SPECIFICATIONS Length: 3.0 Extremely small total power loss - Nominal coil power consumption of 30mW - Double contacts with low contact resistance, e.g. [(A) 2 2.m ] 4NO = 30mW Relay height,.mm Reinforced insulation according to EN 01 - between coil-contacts and contacts-contacts - rated voltage of the circuits 230 / 400V or 2 / 40Vrms - rated impulse voltage of kv clearance. mm - pollution degree 2 creepage distance.mm Contact Contact configuration (a = normally open / NO, b = normally closed / NC) Contact material Contact resistance (initial at V DC, 1A) Typical contact resistance Max. switching capacity Max. switching voltage Min. switching voltage / min. switching current Pick-up / drop-out / bounce time (approx. values at U nominal ) Mechanical life 4a2b AgSnO 2, with Au flash 30m 2.m A/A *1 20V AC 00V AC / DC Reference V / ma 23 / *2 / 2ms ops Characteristics Max. switching frequency (without load) Hz Permissible ambient temperature at nominal *3 power consumption -2 C to 2 C Upper temperature limit C Test voltage: open contact / contact-contact / contact-coil 200 / 4000 / 000V rms Insulation resistance at 00V DC (initial) Shock resistance (11ms) NO/NC *4 20 / 1G Vibration resistance 200 Hz ( Hz, amplitude 2 mm) *4 G Degree of protection RT III * Unit weight 42g Coil Operate / release and holding at 20 C (% of U nominal ) *3 % / 2% min. 4% Pick-up/nominal power consumption 21-23 / 30-420mW Important: Relay characteristics may be influenced by: strong external magnetic fields magnetic conductive materials near the relay narrow top-to-top mounting (printed surface to printed surface) *1 See ELECTRICAL LIFE (Reference Data) *1 on page 2. *2 Without diode *3 See also REFERENCE DATA on page 3. *4 Contact interruption < s * According to EN 1-1: 2004, table 2 ORDERING INFORMATION Ex. SFN4D DC V Coil voltage (DC),,, 1, 1, 21 24, 3, 4, 0 Notes: 1) Standard packing; Tube: pcs. Case 0 pcs. 2) Other coil voltage available upon request ds_0_en_sfn4d: 03D 1
COIL DATA (at 20 C) Part number Coil nominal voltage V DC Operate voltage *1 V DC Release voltage *1 Coil resistance V DC ( %, 20 C) SFN4D-DCV 3. 1.2 4.1 SFN4D-DCV. 2.2 20. SFN4D-DCV.00 3.00 3.2 SFN4D-DC1V 1.00 4.00.4 SFN4D-DC1V 1. 4.0 30. SFN4D-DC21V 21 1..2. SFN4D-DC24V 24 1.00.00. SFN4D-DC3V 3 2.00.00 30. SFN4D-DC4V 4 3.00.00 4. SFN4D-DC0V 0 4.00 1.00 1.4 *1 Operate and release voltage at different temperatures, see REFERENCE DATA on page 3, coil voltage characteristics. SWITCHING CAPABILITY Making / breaking capacities according to EN 04--1: 2000, table 4 / ; AC1: A 230V AC / DC: A 24V DC Endurance / overload test according to UL 0 1 edition, sections 42 / 43; A 20V AC / A 24V DC; B300 / R300; File E02 ELECTRICAL LIFE (Reference Data) *1 Voltage Current (A) Load type Frequency Duty cycle No. of contacts No. of ops. 230V AC AC 1 0.2Hz 2% 4,000 230V AC AC 1 0.2Hz 2% 4 200,000 230V AC 2. AC 1 0.2Hz 2% 4 1,00,000 230V AC 0 / AC 1 0.20Hz 20% 3 40,000 24V DC DC 1 0.2Hz 2% 4 2,000,000 20V DC 0.2 DC 0.Hz % 4 >1,000,000 *2 *1 Test conditions: Room temperature, breathing hole closed, dielectric strength according to EN1-1:2004. *2 Has to be confirmed DIMENSIONS Download CAD Data from our Web site. Outer dimensions CAD Data 3.3 Breathing hole. 33 0.3 Stand-off 1.4 1. 1.4 General tolerance: 0.3 3 0.3 (2x) 3.34... 0.4 (x) (2.1) Projection mode: Schematic (Bottom view) 1 1 PC board pattern (Bottom view) 3.3.4 1. 1 11. +1 2-33. 3.34. 1.4 dia., typical value for manual insertion 1. dia., typical value for automatic insertion 2 ds_0_en_sfn4d: 03D
REFERENCE DATA Coil voltage characteristics SFN4D 0 0 permissible coil voltage without contact load Coil applied voltage [%] 0 1 0 0 0 0 0 0 40 30 20 operative range of the coil voltage typical operate and release voltage with the +/-3σ range without preheated coil min. release voltage at the end of the electrical life min. recommended holding voltage -30-20 - 0 20 30 40 0 0 0 0 0 0 1 Ambient temperature [ o C] Thermic operating range Switching time in relation to coil excitement at 20 C 0 0 0 4 NO contacts simultaneously 4 x A 4 x A 4 x 0A To the right of the curves the relay operates in a temperature range exceeding the stated limit of o C 0 Coil applied voltage [%] 1 0 0 0 0 0 0 40 Coil applied voltage [%] 0 0 1 0 0 bbm 30 20 0 0 NC 1 NO 4 0 40 0 0 0 0 0 0 1 Ambient temperature [ o C] 0 0 20 30 40 0 0 Typ. pick-up time [ms] ds_0_en_sfn4d: 03D 3
REFERENCE DATA, continued Load limit curve 00 300 Contact voltage [VDC] 200 0 0 0 30 300 W 20 W 200 W W 0 W 0 W 0 W 40 W 20 20 W W 0.1 0.2 0.3 0. 0. 1 2 3 4 Contact current [A] Time / current characteristic 000 00 Fuse-link D II A, 00 V operating class gl (A gg) DIN 4 1 Current [A] 0 SFN4D, Contact withstand current glass tube x 20 mm, 20V Fuse-link,3A F (quick acting) IEC 0-2/2 1 0.001 0.01 0.1 1 0 00 000 0000 Time [Sec] 4 ds_0_en_sfn4d: 03D
APPLICATION NOTES The SFN4D Safety Relay SFN4D NC contact - Sub card 1 Armature NO contact -11 Remark: Only NC - monitors all NO contacts! NO contact - Main card 1 Sub card 2 NO contact - 1 NO contact - NC contact 1-1 Legend for interpreting contact conditions Contact NC (Normally Closed) NO (Normally Open) Condition Closed Fully open Open Open or closed Closed Fully open Open Open or closed Symbol Contact gap 0 Maximum (~1.mm) >0.mm (forcibly guided) Not defined 0 Maximum (~1.mm) >0.mm (forcibly guided) Not defined The SFN4D under normal operating conditions Condition Illustration of Relay State Condition of Contacts - Armature in deenergized position. - NC contacts closed. - NO contacts have a contact gap of approx. 1.mm. 1 1 - Coil energized. - Armature in energized position. - NO contacts closed. - NC contacts have a contact gap of approx. 1.mm. 1 1 ds_0_en_sfn4d: 03D
The SFN4D safety relay with welded contacts Condition Illustration of Relay State Condition of Contacts - NC - welded. - Coil energized. - Armature nearly in deenergized position. 1 1 - All NO contacts are forcibly guided. - The NO contact gaps are min. 0.mm. - For NC 1-1, the contact condition is not defined. - NC 1-1 welded. - Coil energized. - Armature nearly in deenergized position. 1 1 - All NO contacts are forcibly guided. - The NO contact gaps are min. 0.mm. - For NC -, the contact condition is not defined. - NO -11 welded. - Armature nearly in energized position. 1 1 - All (both) NC contacts are forcibly guided. - The NC contact gaps are min. 0.mm. - For all NO contacts, the contact condition is not defined. - NO - welded. - Armature in nearly energized position. 1 1 - All (both) NC contacts are forcibly guided. - The NC contact gaps are min. 0.mm. - For all NO contacts, the contact condition is not defined. - NO - welded. - Armature in deenergized position. 1 1 - NC 1-1 is closed!! - All non-welded NO contacts show their max. contact gap. - NC - forcibly guided to the welded contact by sub card 1. The contact gap is min. 0.mm. - NO - welded. - Armature in deenergized position. 1 1 - NC 1-1 is closed!! - All non-welded NO contacts show their max. contact gap. - NC - forcibly guided to the welded contact by sub card 2. The contact gap is min. 0.mm. ds_0_en_sfn4d: 03D
Failure modes, application examples 1)Feedback loop, 2) Self-holding circuit, 3) Safety circuit, 4) Auxiliary contacts SFN4D 1. Self-holding circuit, three safety circuits One contact welded, e.g. NO - of. 1 1 11 11 1 1 1 1 11 1 1 1) 2) 2) 3) 3) 3) 4) One contact welded, e.g. NO -11 of. 1 1 11 1 1 2.1. Four safety circuits One contact welded, e.g. NO - of. 1 1 1 1 11 1 1 11 1 1 1) 3) 3) 3) 3) 4) (see wiring example, p. ) One contact welded, e.g. NO -11 of. 11 11 1 1 1 1 2.2. Two safety circuits 1 1 Both contacts of one path are welded, e.g. NO - and NO -. A safety circuit needs two paths in this failure mode. The contacts -, -11, and - of interrupt the load. 11 11 1 1 1 1 11 1 1 1) 3) 3) 4) (see wiring example, p. ) { { Both contacts of one path are welded, e.g. NO - and NO -11. A safety circuit needs two paths in this failure mode. The contacts -, -11, and - of interrupt the load. 1 1 11 1 1 ds_0_en_sfn4d: 03D
Wiring for application examples 2.1 and 2.2 1+ -2 11 1 1 1 1 11-2 +1 1st layer 2nd layer For Cautions for Use, see Relay Technical Information. ds_0_en_sfn4d: 03D