258

SF

POLARISED, MONOSTABLE

SAFETY RELAY with

(mechanical linked) forced

contacts operation

SF-RELAYS

(SF3 pending) (SF3 pending)

(SF3 pending)

π

FEATURES

• Forced operation contacts (2 Form A

2 Form B, 3 Form A 1 Form B)

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

gap.

• Independent operation contacts

(4 Form A 4 Form B)

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.

• Separated chamber structure

(2 Form A 2 Form B, 3 Form A 1 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.

• UL/CSA, TÜV, SEV approved

(UL/CSA, SEV of SF3 pending)

25.0

.984

16.5

±0.3

.650

±.012

53.3

±0.3

2.098

±.012

25.0

.984

16.5

±0.3

.650

±.012

53.3

±0.3

2.098

±.012

33

±0.3

1.299

±.012

16.5

±0.3

.650

±.012

53.3

±0.3

2.098

±.012

SPECIFICATIONS

ORDERING INFORMATION

Ex. SF

2

DC 12 V

Contact arrangement

Coil voltage

DC 5, 9, 12, 18, 21,

24, 36, 48, 60 V

2: 2 Form A 2 Form B

3: 3 Form A 1 Form B

4: 4 Form A 4 Form B

UL/CSA, TÜV, SEV approved type is standard (SF2, SF4)

TÜV approved type is standard (SF3)

TYPICAL APPLICATIONS

• Signal

• Escalator

• Elevator

• Medical Instruments

• Railway

• Factory Automation

Remarks

* Specifications will vary with foreign standards certification ratings.

side of contact pairs of each Form A contact and Form B contact

µs

µs

AMBIENT ENVIRONMENT (Page 61).

Contact

Type

SF2

SF3

SF4

Arrangement

2 Form A

2 Form B

3 Form A

1 Form B

4 Form A

4 Form B

Initial contact resistance, max.

(By voltage drop 6 V DC 1 A)

30 m

Ω

Contact material

Gold-flashed silver alloy

Rating

(resistive)

Nominal switching

capacity

6 A 250 V AC, 6 A 30 V DC

Max. switching power

1,500 VA, 180 W

Max. switching voltage

30 V DC, 440 V AC

Max. carrying current

6 A DC, AC

Expected

life (min.

operations)

Mechanical (at 180

cpm) (resistive)

Electrical (at 20 cpm)

3

Nominal operating power

500 mW

SF2

SF3

SF4

Max. operating speed

180 cpm (at nominal voltage)

Min. 1,000 M

Ω at 500 V DC

Initial break-

Between con-

tact sets

2,500 Vrms

Between open

contacts

2,500 Vrms

Between con-

tact and coil

2,500 Vrms

(at nominal voltage)

Approx. 17 ms

Approx. 18 ms

(at nominal voltage)

Approx. 7 ms

Approx. 6 ms

Temperature rise

(at nominal voltage)

Max. 45

°C with nominal coil voltage

and at 6 A switching current

Shock

resistance

Vibration

resistance

at double amplitude of 2 mm

Destructive

at double amplitude of 2 mm

Conditions for oper-

ation, transport and

(Not freezing and

condensing at low

temperature)

Ambient

temp.

–40

Humidity

5 to 85% R.H.

Unit weight