Datasheet

ManualsBrandsPanasonic ManualsRelaysPCB Safety Relay SFN4D, 4NO + 2NC, 24V, 1.48kOhm, 6A

SFN4D

ds_61408_0000_en_sfn4d: 141106D

SPECIFICATIONS

ORDERING INFORMATION

LOW PROFILE

SAFETY RELAY

WITH FORCIBLY GUIDED

CONTACTS

SFN4D

RELAY

Features

• Relay complies with EN 50205, Type B

• Polarized magnet system with snap action function

• Extremely small total power loss

- Nominal coil power consumption of 390mW

- Double contacts with low contact resistance,

e.g. [(6A)

2.5mΩ] 4NO = 360mW

• Relay height, 14.5mm

• Reinforced insulation according to EN 50178

- between coil-contacts and contacts-contacts

- rated voltage of the circuits 230 / 400V or 277 / 480Vrms

- rated impulse voltage of 6kV clearance 5.5 mm

- pollution degree 2 creepage distance 5.5mm

14.5

33.0

53.3

Tolerance ±0.3 mm

Weight approx. 42 g

Length: 3.0

××

→≥

Contact

Coil

*1 See “ELECTRICAL LIFE (Reference Data)

” on page 2.

*2 Without diode

*3 See also “REFERENCE DATA” on page 3.

*4 Contact interruption <10μs

*5 According to EN 61810-1: 2004, table 2

Characteristics

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)

Contact configuration (a = normally open / NO,

b = normally closed / NC)

4a2b

Contact material

AgSnO

, with Au flash

Contact resistance (initial at 6V DC, 1A)

Typical contact resistance

≤30mΩ

2.5mΩ

Max. switching capacity

6A/8A

250V AC

Max. switching voltage

500V AC / DC

Min. switching voltage / min. switching current

Reference 10V / 10mA

Pick-up / drop-out / bounce time

(approx. values at U

nominal

)

23 / 6

/ 2ms

Mechanical life

ops

Operate / release

and holding at 20°C (% of U

nominal

)

75% / 25%

min. 48%

Pick-up/nominal power consumption

219-236 / 390-420mW

Max. switching frequency (without load)

5Hz

Permissible ambient temperature at nominal

power consumption

-25°C to 92°C

Upper temperature limit

105°C

Test voltage:

open contact / contact-contact / contact-coil

2500 / 4000 /

5000V

rms

Insulation resistance at 500V DC (initial)

Shock resistance (11ms) NO/NC

20 / 15G

Vibration resistance 10 – 200 Hz (10 – 55 Hz,

amplitude 2 mm)

10G

Degree of protection

RT III

Unit weight

42g

Ex. SFN4D DC12 V

5, 9, 12, 16, 18, 21

24, 36, 48, 60

Coil voltage (DC)

Notes:1) Standard packing; Tube: 10 pcs. Case 100 pcs.

 2) Other coil voltage available upon request

Summary of content (8 pages)

PAGE 1
SFN4D LOW PROFILE SAFETY RELAY WITH FORCIBLY GUIDED CONTACTS SFN4D RELAY Features • Relay complies with EN 50205, Type B • Polarized magnet system with snap action function 53.3 33.0 • Extremely small total power loss - Nominal coil power consumption of 390mW - Double contacts with low contact resistance, e.g. [(6A)2 × 2.5mΩ] × 4NO = 360mW 14.5 • Relay height, 14.5mm Tolerance ±0.3 mm Weight approx.
PAGE 2
SFN4D COIL DATA (at 20°C) SFN4D-DC5V 5 3.75 1.25 Coil resistance Ω (±10%, 20°C) 64.1 SFN4D-DC9V 9 6.75 2.25 207.7 SFN4D-DC12V 12 9.00 3.00 369.2 SFN4D-DC16V 16 12.00 4.00 656.4 SFN4D-DC18V 18 13.5 4.50 830.8 SFN4D-DC21V 21 15.75 5.25 1130.8 SFN4D-DC24V 24 18.00 6.00 1476.9 SFN4D-DC36V 36 27.00 9.00 3085.7 SFN4D-DC48V 48 36.00 12.00 5485.7 SFN4D-DC60V 60 45.00 15.00 8571.
PAGE 3
SFN4D REFERENCE DATA Coil voltage characteristics 170 permissible coil voltage without contact load 160 150 140 130 Coil applied voltage [%] 120 operative range of the coil voltage 110 100 90 80 typical operate and release voltage with the +/-3σ range without preheated coil 70 60 min. recommended holding voltage 50 40 30 20 10 -30 min.
PAGE 4
SFN4D REFERENCE DATA, continued Load limit curve 500 300 300 W Contact voltage [VDC] 200 250 W 200 W 100 150 W 70 100 W 80 W 50 60 W 30 40 W 20 W 20 10 W 10 0.1 0.2 0.3 0.5 0.7 1 2 3 4 5 6 7 8 10 Contact current [A] Time / current characteristic 10000 Current [A] 1000 Fuse-link D II 6A , 500 V operating class gL (6A gG) DIN 49 515 100 SFN4D, Contact withstand current 10 Fuse-link 6,3A F (quick acting) glass tube 5 x 20 mm, 250V IEC 60 127-2/2 1 0.001 0.01 0.
PAGE 5
SFN4D APPLICATION NOTES The SFN4D Safety Relay NC contact 5-6 Armature Sub card 1 NO contact 12-11 NO contact 7-8 Main card Sub card 2 NO contact 14-13 NO contact 9-10 NC contact 16-15 Remark: Only NC 5-6 monitors all NO contacts! 5 7 9 12 14 16 6 8 10 11 13 15 Legend for interpreting contact conditions Contact Condition NC (Normally Closed) NO (Normally Open) Closed Fully open Open Open or closed Closed Fully open Open Open or closed 0 Maximum (~1.5mm) >0.
PAGE 6
SFN4D The SFN4D safety relay with welded contacts Condition Illustration of Relay State Condition of Contacts - NC 5-6 welded. - Coil energized. - Armature nearly in deenergized position. 5 7 9 12 14 16 6 8 10 11 13 15 - NC 16-15 welded. - Coil energized. - Armature nearly in deenergized position. 5 7 9 12 14 16 6 8 10 11 13 15 - NO 12-11 welded. - Coil deenergized. - Armature nearly in energized position. 5 7 9 12 14 16 6 8 10 11 13 15 - NO 14-13 welded.
PAGE 7
SFN4D Failure modes, application examples 1) Feedback loop, 2) Self-holding circuit, 3) Safety circuit, 4) Auxilliary contacts Condition of contacts at deenergized coil K1 1. Self-holding circuit, three safety circuits K1 K2 5 7 9 12 14 16 6 8 10 11 13 15 13 11 10 8 15 5 14 12 9 7 16 1) 2) 2) 3) 3) 3) 7 9 12 14 16 6 8 10 11 13 15 One contact welded, e.g. NO 9-10 of K1.
PAGE 8
SFN4D Wiring for application examples 2.1 and 2.2 1+ -2 5 6 11 12 7 8 13 14 9 10 15 16 16 15 10 9 14 13 8 7 12 11 6 5 -2 +1 1st layer 2nd layer For Cautions for Use, see Relay Technical Information.