SF2 Datasheet, PDF (1/7 Pages) Nais(Matsushita Electric Works) – POLARISED, MONOSTABLE SAFETY RELAY with (mechanical linked) forced contacts operation

SF
(SF3 pending) (SF3 pending)
(SF3 pending)
POLARISED, MONOSTABLE
SAFETY RELAY with
(mechanical linked) forced
contacts operation
SF-RELAYS
π
53.3±0.3
2.098±.012
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
mm inch
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
keeps a min. 0.5mm .020inch contact
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)
SPECIFICATIONS
Contact
Type
Arrangement
Initial contact resistance, max.
(By voltage drop 6 V DC 1 A)
Contact material
Rating
(resistive)
Nominal switching
capacity
Max. switching power
Max. switching voltage
Max. carrying current
Expected ^{Mechanical (at 180}
life (min. ^{cpm) (resistive)}
operations) _{Electrical (at 20 cpm)}
SF2
SF3
SF4
2 Form A 3 Form A 4 Form A
2 Form B 1 Form B 4 Form B
30 mΩ
Gold-flashed silver alloy
6 A 250 V AC, 6 A 30 V DC
1,500 VA, 180 W
30 V DC, 440 V AC
6 A DC, AC
10⁷
3×10⁴*¹
10⁵
Coil (at 25°C 77°F)
Nominal operating power
500 mW
Remarks
* Specifications will vary with foreign standards certification ratings.
*1 _{More than 10}5 _{operations when applying the nominal switching capacity to one}
side of contact pairs of each Form A contact and Form B contact
*2 _{Measurement at same location as " Initial breakdown voltage " section}
*3 _{Detection current: 10mA}
*4 _{Excluding contact bounce time}
*5 _{Half-wave pulse of sine wave: 11ms; detection time: 10µs}
*6 _{Half-wave pulse of sine wave: 6ms}
*7 _{Detection time: 10µs}
*8 _{Refer to 5. Conditions for operation, transport and storage mentioned in}
AMBIENT ENVIRONMENT (Page 61).
Characteristics (at 25°C 77°F, 50% Relative humidity)
SF2
SF3
SF4
Max. operating speed
180 cpm (at nominal voltage)
Initial insulation resistance*²
Min. 1,000 MΩ at 500 V DC
Between con-
tact sets
2,500 Vrms
Initial break- Between open
down voltage*³ contacts
2,500 Vrms
Between con-
tact and coil
2,500 Vrms
Operate time*⁴
(at nominal voltage)
Approx. 17 ms Approx. 18 ms
Release time (without diode)*⁴
(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
Functional* ⁵
Destructive*⁵
Min. 294 m/s² {30 G}
Min. 980 m/s² {100 G}
Vibration
resistance
Functional* ⁷
Destructive
117.6 m/s² {12 G}, 10 to 55 Hz
at double amplitude of 2 mm
117.6 m/s² {12 G}, 10 to 55 Hz
at double amplitude of 2 mm
Conditions for oper-
ation, transport and
storage*⁸
(Not freezing and
condensing at low
temperature)
Ambient
temp.
Humidity
–40°C to +70°C –40°F to +158°F
5 to 85% R.H.
Unit weight
37 g 1.31 oz
47 g 1.66 oz
ORDERING INFORMATION
Ex. SF 2
DC 12 V
Contact arrangement
Coil voltage
2: 2 Form A 2 Form B
3: 3 Form A 1 Form B
4: 4 Form A 4 Form B
DC 5, 9, 12, 18, 21,
24, 36, 48, 60 V
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
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