SF
POLARISED, MONOSTABLE
SAFETY RELAY with
(mechanical linked) forced
contacts operation
蟺
53.3鹵0.3
2.098鹵.012
25.0
.984
16.5鹵0.3
.650鹵.012
(SF3 pending) (SF3 pending)
(SF3 pending)
SF-RELAYS
enables to plan a circuit to detect welding
or go back to the beginning condition.
鈥?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.
鈥?UL/CSA, T脺V, SEV approved
(UL/CSA, SEV of SF3 pending)
FEATURES
鈥?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.
鈥?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
53.3鹵0.3
2.098鹵.012
25.0
.984
16.5鹵0.3
.650鹵.012
53.3鹵0.3
2.098鹵.012
33鹵0.3
1.299鹵.012
16.5鹵0.3
.650鹵.012
mm
inch
SPECIFICATIONS
Contact
Type
Arrangement
Initial contact resistance, max.
(By voltage drop 6 V DC 1 A)
Contact material
Nominal switching
capacity
Rating
Max. switching power
(resistive)
Max. switching voltage
Max. carrying current
Mechanical (at 180
Expected
cpm) (resistive)
life (min.
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 m
鈩?/div>
Gold-鏗俛shed 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
10
7
3
脳
10
4
*
1
10
5
Characteristics
(at 25擄C
77擄F
, 50% Relative humidity)
Max. operating speed
Initial insulation resistance*
2
Between con-
tact sets
Initial break-
Between open
down voltage*
3
contacts
Between con-
tact and coil
Operate time*
4
(at nominal voltage)
Release time (without diode)*
4
(at nominal voltage)
Temperature rise
(at nominal voltage)
Functional*
5
Shock
resistance
Destructive*
5
Vibration
resistance
Conditions for oper-
ation, transport and
storage*
8
(Not freezing and
condensing at low
temperature)
SF2
SF3
SF4
180 cpm (at nominal voltage)
Min. 1,000 M
鈩?/div>
at 500 V DC
2,500 Vrms
2,500 Vrms
2,500 Vrms
Approx. 17 ms
Approx. 7 ms
Approx. 18 ms
Approx. 6 ms
Coil
(at 25擄C
77擄F
)
Nominal operating power
Remarks
* Speci鏗乧ations will vary with foreign standards certi鏗乧ation ratings.
*1
500 mW
Functional*
7
Destructive
Ambient
temp.
Humidity
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: 10
碌
s
*6
Half-wave pulse of sine wave: 6ms
*7
Detection time: 10
碌
s
*8
Refer to 5. Conditions for operation, transport and storage mentioned in
AMBIENT ENVIRONMENT (Page 61).
Max. 45
擄
C with nominal coil voltage
and at 6 A switching current
Min. 294 m/s
2
{30 G}
Min. 980 m/s
2
{100 G}
117.6 m/s
2
{12 G}, 10 to 55 Hz
at double amplitude of 2 mm
117.6 m/s
2
{12 G}, 10 to 55 Hz
at double amplitude of 2 mm
鈥?0
擄
C to +70
擄
C
鈥?0擄F to +158擄F
5 to 85% R.H.
37 g
1.31 oz
47 g
1.66 oz
Unit weight
ORDERING INFORMATION
Ex. SF
2
DC 12 V
Coil voltage
DC 5, 9, 12, 18, 21,
24, 36, 48, 60 V
Contact arrangement
2: 2 Form A 2 Form B
3: 3 Form A 1 Form B
4: 4 Form A 4 Form B
TYPICAL APPLICATIONS
鈥?Signal
鈥?Escalator
鈥?Elevator
鈥?Medical Instruments
鈥?Railway
鈥?Factory Automation
UL/CSA, T脺V, SEV approved type is standard (SF2, SF4)
T脺V approved type is standard (SF3)
258
NAIS
1
2
3
4
5
6
7
