NAIS SF2D-DC12V, SF2D-DC24V, SF2D-DC48V, SF2D-DC60V, SF4D-DC12V Datasheet

(pending)

53.3±0.3

2.098±.012

2 Form A 2 Form B

53.3±0.3

2.098±.012

4 Form A 4 Form B

25.0

.984

16.5±0.5

.650±.020

POLARISED, MONOSTABLE
SAFETY RELAY

FEATURES

• High contact reliability

High contact reliability is achieved through
the use of a double contact.

• Forced operation contacts
(2 Form A 2 Form B)

N.O. and N.C. side contacts are
connected through a card so that one

33±0.5

1.299±.020

16.5±0.5

.650±.020

mm inch

interacts with the other in movement. In
case of a contact welding, the other keeps
a min. 0.5mm .020inch contact gap.

• 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.

SF-RELAYS

Double contact

• Separated chamber structure (2 Form
A 2 Form B, 4 Form A 4 Form B)

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.

• High breakdown voltage 2,500 Vrms
between contacts and coil

• 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.

• Complies with safety standards

Standard products are UL, CSA, TÜV and
SEV certified. Comform to European
standards. TÜV certified (945/EL, 178/

88). Complies with SUVA European
standard.

SPECIFICATIONS

Contact

Contact arrangement
Initial contact resistance, max.

(By voltage drop 6 V DC 1 A)
Contact material Gold-flashed silver alloy

Nominal switching

Rating
(resistive)

Expected
life (min.
operations)

capacity
Max. switching power 1,500 VA, 180 W
Max. switching voltage 440 V AC, 30 V DC
Max. carrying current 6 A
Mechanical (at 180 cpm) 10

Electrical (at 20 cpm) 10

2 Form A
2 Form B

6 A 250 V AC, 6 A 30 V DC

Coil

Nominal operating power 500 mW

Remarks

* Specifications will vary with foreign standards certification ratings.

1

Measurement at same location as “Initial breakdown voltage” section

*
*2Detection current: 10mA

3

Excluding contact bounce time

*
*4Half-wave pulse of sine wave: 11ms; detection time: 10µs
*5Half-wave pulse of sine wave: 6ms
*6Detection time: 10µs

7

Refer to 6. Usage, transport and storage mentioned in NOTES

*

30 m

4 Form A
4 Form B

Ω

7

5

Characteristics

Contact arrangement
Max. operating speed 180 cpm (at nominal voltage)

Initial insulation resistance*
Initial

breakdown
voltage*

Operate time*
Release time (without diode)*

(at nominal voltage)
Temperature rise (at nominal voltage)

(at 20°C)

Shock resistance

Vibration resistance

Conditions for operation,
transport and storage*
freezing and condensing at
low temperature)

Unit weight

Between open contacts 1,300 Vrms
Between contact sets 2,500 Vrms

2

Between contact and coil 2,500 Vrms

3

(at nominal voltage) Approx. 17 ms Approx. 18 ms

1

3

Functional*
Destructive*

Functional*

Destructive

Ambient

7

(Not

temp.
Humidity 5 to 85% R.H.

2 Form A
2 Form B

Min. 1,000 MΩ at 500 V DC

Approx. 7 ms Approx. 6 ms

with nominal coil voltage and

4

5

6

38 g 1.34 oz

Max. 45°C

at 6 A carry current

Min. 294 m/s2 {30 G}

Min. 980 m/s2 {100 G}

10 to 55 Hz at double

amplitude of 2 mm

10 to 55 Hz at double

amplitude of 2 mm

–40°C to +70°C

–40°F to +158°F

Approx.

4 Form A
4 Form B

Approx.

47 g 1.66 oz

4

ORDERING INFORMATION

Ex. SF 2 D DC 5 V

Contact arrangement Coil voltage

DC 5, 12, 24, 48, 60 V2: 2 Form A 2 Form B

4: 4 Form A 4 Form B

UL/CSA, TÜV, SEV approved type is standard

TYPES AND COIL DATA (at 20°C 68°F)

Contact

arrangement

2 Form A
2 Form B

4 Form A
4 Form B

Part No.

Nominal

voltage, V DC

SF2D-DC5V 5 3.75 0.5 50 100 500 6
SF2D-DC12V 12 9 1.2 288 41.7 500 14.4
SF2D-DC24V 24 18 2.4 1.152 20.8 500 28.8
SF2D-DC48V 48 36 4.8 4.608 10.4 500 57.6
SF2D-DC60V 60 45 6.0 7.200 8.3 500 72
SF4D-DC5V 5 3.75 0.75 50 100 500 6
SF4D-DC12V 12 9 1.8 288 41.7 500 14.4
SF4D-DC24V 24 18 3.6 1.152 20.8 500 28.8
SF4D-DC48V 48 36 7.2 4.608 10.4 500 57.6
SF4D-DC60V 60 45 9.0 7.200 8.3 500 72

Pick-up

voltage, VDC

(max.)

voltage, V DC

DIMENSIONS

1. 2 Form A 2 Form B

12.7

12.7

12.7

25.0

.984

7.62

.300

5.08

.200

.500

53.3±0.3

2.098±.012

6587

1

2

109

.500

.500

TYPICAL APPLICATIONS

• Industrial equipment such as presses and machine tools

Drop-out

(min.)

.630±.020

3.0±0.5

.118±.020

1211

Coil resistance

16±0.5

0.5

.020

12.7

.500

Ω

(±10%)

Nominal

operating

current,

mA (±10%)

Nominal

operating

power, mW

Schematic (Bottom view)

5

1

2

9 101112

PC board pattern (Bottom view)

2.54

10-.055 DIA. HOLES

2.54

.100

.100

Max. allow able

voltage, V DC

mm inch

678

10-1.4 DIA. HOLES

2. 4 Form A 4 Form B

33±0.5

1.299±.020

7.62

.300

5.08

.200

General tolerance: ±0.3 ±.012

Tolerance: ±0.1 ±.004

Schematic (Bottom view)

13

14615716

16±0.5

.630±.020

0.3

.012

3.0±0.5

12.7

12.7

12.7

.500

.500

53.3±0.3

2.098±.012

1413 1615

65

1

2

109
1817 2019

.500

.118±.020

87

1211

7.62

.300

12.7

.500

7.62

.300

2.54

.100

1

5
9171018111912

2

8

20

PC board pattern (Bottom view)

2.54

.100

18-1.4 DIA. HOLES

18-.055 DIA. HOLES

General tolerance: ±0.3 ±.012

Tolerance: ±0.1 ±.004

5