SF4-DC9V [NAIS]
POLARISED, MONOSTABLE SAFETY RELAY with (mechanical linked) forced contacts operation; 极化，单稳态安全继电器（机械链接）被迫接触操作
| 型号： | SF4-DC9V |
| 厂家： | 
NAIS(MATSUSHITA ELECTRIC WORKS) |
| 描述： | POLARISED, MONOSTABLE SAFETY RELAY with (mechanical linked) forced contacts operation |
| 文件： | 总7页 (文件大小：341K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
(SF3 pending) (SF3 pending)
(SF3 pending)
POLARISED, MONOSTABLE
SAFETY RELAY with
(mechanical linked) forced
contacts operation
SF-RELAYS
π
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.
25.0
.984
FEATURES
53.3±0.3
2.098±.012
• Forced operation contacts (2 Form A
2 Form B, 3 Form A 1 Form B)
16.5±0.3
.650±.012
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
25.0
.984
53.3±0.3
2.098±.012
16.5±0.3
.650±.012
33±0.3
53.3±0.3
1.299±.012
2.098±.012
• UL/CSA,TÜV, SEV approved
(UL/CSA, SEV of SF3 pending)
16.5±0.3
.650±.012
mm inch
SPECIFICATIONS
Contact
Characteristics (at 25°C 77°F, 50% Relative humidity)
SF2 SF3
180 cpm (at nominal voltage)
Type
SF2
SF3
SF4
SF4
2 Form A 3 Form A 4 Form A
2 Form B 1 Form B 4 Form B
Max. operating speed
Arrangement
Initial insulation resistance*2
Min. 1,000 MΩ at 500 V DC
Initial contact resistance, max.
(By voltage drop 6 V DC 1 A)
Between con-
tact sets
30 mΩ
2,500 Vrms
Contact material
Gold-flashed silver alloy
6 A 250 V AC, 6 A 30 V DC
Initial break-
down voltage*3 contacts
Between con-
tact and coil
Between open
2,500 Vrms
2,500 Vrms
Nominal switching
capacity
Rating
(resistive)
Max. switching power
1,500 VA, 180 W
30 V DC, 440 V AC
6 A DC, AC
Operate time*4
Max. switching voltage
Approx. 17 ms
Approx. 7 ms
Approx. 18 ms
Approx. 6 ms
(at nominal voltage)
Release time (without diode)*4
(at nominal voltage)
Max. carrying current
Mechanical (at 180
cpm) (resistive)
Expected
life (min.
107
Electrical (at 20 cpm)
3×104*1
105
Temperature rise
Max. 45°C with nominal coil voltage
operations)
(at nominal voltage)
and at 6 A switching current
Functional*5
Destructive*5
Functional*7
Min. 294 m/s2 {30 G}
Min. 980 m/s2 {100 G}
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
Shock
resistance
Coil (at 25°C 77°F
Nominal operating power
)
500 mW
Remarks
Vibration
resistance
* Specifications will vary with foreign standards certification ratings.
*1
More than 105 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
Destructive
Conditions for oper-
ation, transport and
Ambient
temp.
–40°C to +70°C –40°F to +158°F
8
storage*
*4 Excluding contact bounce time
(Not freezing and
condensing at low
temperature)
*5 Half-wave pulse of sine wave: 11ms; detection time: 10µs
*6 Half-wave pulse of sine wave: 6ms
Humidity
5 to 85% R.H.
*7 Detection time: 10µs
Unit weight
37 g 1.31 oz
47 g 1.66 oz
*8 Refer to 5. Conditions for operation, transport and storage mentioned in
AMBIENT ENVIRONMENT (Page 61).
ORDERING INFORMATION
TYPICAL APPLICATIONS
• Signal
• Escalator
Ex. SF
2
DC 12 V
• Elevator
Contact arrangement
Coil voltage
• Medical Instruments
• Railway
• Factory Automation
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)
258
SF
TYPES AND COIL DATA (at 20°C 68°F)
Nominal
operating
current,
Pick-up
Drop-out
Coil
resistance
Ω (±10%)
Nominal
operating
power, mW
Contact
arrangement
Nominal
voltage, V DC
Max. allowable
voltage, V DC
Part No.
voltage, VDC voltage, V DC
(max.)
(min.)
mA(±10%)
SF2-DC5V
SF2-DC9V
SF2-DC12V
SF2-DC18V
SF2-DC21V
SF2-DC24V
SF2-DC36V
SF2-DC48V
SF2-DC60V
SF3-DC5V
SF3-DC9V
SF3-DC12V
SF3-DC18V
SF3-DC21V
SF3-DC24V
SF3-DC36V
SF3-DC48V
SF3-DC60V
SF4-DC5V
SF4-DC9V
SF4-DC12V
SF4-DC18V
SF4-DC21V
SF4-DC24V
SF4-DC36V
SF4-DC48V
SF4-DC60V
5
3.75
6.75
9
0.5
0.9
1.2
1.8
2.1
2.4
3.6
4.8
6.0
0.5
0.9
1.2
1.8
2.1
2.4
3.6
4.8
6.0
0.75
0.9
1.8
1.8
2.1
3.6
3.6
7.2
9.0
50
100
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
6
9
10.8
14.4
21.6
25.2
28.8
43.2
57.6
72
12
18
21
24
36
48
60
5
288
41.7
13.5
15.75
14.4
27
SF2
SF3
SF4
1.152
20.8
36
4.608
7.200
50
10.4
8.3
45
3.75
6.75
9
100
6
9
10.8
14.4
21.6
25.2
28.8
43.2
57.6
72
12
18
21
24
36
48
60
5
288
41.7
20.8
13.5
15.75
14.4
27
1.152
36
4.608
7.200
50
10.4
8.3
45
3.75
6.75
9
100
6
9
10.8
14.4
21.6
25.2
28.8
43.2
57.6
72
12
18
21
24
36
48
60
288
41.7
20.8
13.5
15.75
14.4
27
1.152
36
4.608
7.200
10.4
8.3
45
mm inch
DIMENSIONS
Schematic (Bottom view)
1) SF2
5
6
7
8
1
2
16±0.3
.630±.012
0.5
9
10
11
12
.020
3.5±0.3
.138±.012
12.7
.500
12.7
.500
12.7
.500
5.08
.200
PC board pattern (Bottom view)
53.3±0.3
2.098±.012
10-1.4 DIA. HOLES
2.54
10-.055 DIA. HOLES
.100
5
6
7
8
2.54
.100
25.0
.984
1
2
12.7
.500
7.62
.300
9
10
11
12
General tolerance: ±0.3 ±.012
Tolerance: ±0.1 ± .004
259
SF
2) SF3
mm inch
Schematic (Bottom view)
5
6
7
8
1
2
16±0.3
.630±.012
0.5
9
10 11 12
.020
3.5±0.3
.138±.012
12.7
.500
12.7
.500
12.7
.500
5.08
.200
PC board pattern (Bottom view)
53.3±0.3
10-1.4 DIA. HOLES
2.098±.012
2.54
10-.055 DIA. HOLES
.100
5
6
7
8
2.54
.100
25.0
.984
1
2
12.7
.500
7.62
.300
9
10
11
12
General tolerance: ±0.3 ±.012
Tolerance: ±0.1 ±.004
3) SF4
Schematic (Bottom view)
13 14 15 16
16±0.3
1
2
.630±.012
5
9
6
7
8
10 11 12
0.3
.012
3.5±0.3
12.7
.500
12.7
.500
12.7
.500
.138±.012
5.08
.200
17 18 19 20
53.3±0.3
2.098±.012
13
5
14
6
15
7
16
8
7.62
.300
33±0.3
PC board pattern (Bottom view)
1.299±.012
1
2
12.7
.500
7.62
.300
18-1.4 DIA. HOLES
2.54
18-.055 DIA. HOLES
.100
2.54
.100
9
17
10
18
11
19
12
20
7.62
.300
General tolerance: ±0.3 ±.012
Tolerance: ±0.1 ±.004
REFERENCE DATA
1. Operate/release time
2. Coil temperature rise
3. Ambient temperature characteristics
Coil applied voltage: 120%V
Contact switching current: 6A
Tested sample: SF4-DC12V
Quantity: n = 6
60
100
50
40
30
Drop-out
voltage
50
40
30
20
10
0
50
Pick-up
voltage
-40 -20
0
Inside the coil
Contact
Operate time
20 40 60 80
Ambient
20
temperature, °C
Max.
x
-50
Min.
10
Max.
x
Release time
Min.
-100
0
30
50
70
80
90
100
110
120
Ambient temperature, °C
Coil applied voltage, %V
260
SF
SAFETY STRUCTURE OF SF RELAYS
This SF relay design ensures that
externally caused circuit or device
scenario, relay breakdown (coil rupture,
subsequent operations shut down and can breakdowns, end of life incidents, and
faulty operation, faulty return, and fatigue
and breakage of the operating spring and
return spring), and even in the event of
end of life.
automatically return to a safe state when
the SF relay suffers overloading and other
circuit abnormalities (unforeseen
noise, surge, and environmental
influences) owing to contact welding,
spring fusion or, in the worst-case
Structure
Operation
Min. 0.5 mm .020 inch
Even when one contact is welded closed,
the other maintains a gap of greater than
0.5 mm .020 inch.
Contact a
Contact b
Card
1. Forced operation method
(2a2b, 3a1b, 4a4b types)
In the diagram on the left, the lower
contact "b" have welded but the upper con-
tact "a" maintain at a gap of greater than
0.5 mm .020 inch.
Weld
Subsequent contact movement is
suspended and the weld can be detected
The two contacts “a” and “b” are coupled with the same
card. The operation of each contact is regulated by the
movement of the other contact.
External NO
contact weld
Return
Enables design of safety circuits that allow
weld detection and return at an early stage.
2. Independent operation method
(4a4b type)
As shown at the top right of the diagram on
the left, if the external N.O. contact welds, a
0.5 mm .020 inch gap is maintained.
Return
Return
Each of the other contacts returns to N.O.
because the coil is no longer energized.
None of four contacts are held in position by the armature.
Even though one of the external N.O. contacts has
welded, the other three contacts have returned owing to
the de-energizing of the coil.
In independent chambers, the contacts "a" and "b" are
kept apart by a body/card separator or by the card itself.
Prevents shorting and fusing of springs and
spring failure owing to short-circuit current.
Case separator
Card
1
3. Separate chamber method
(2a2b, 3a1b, 4a4b types)
Contact a
As shown on the diagram on the left, even
if the operating springs numbered 1 and 2
there is no shorting between "a" and "b"
contacts.
Body
separator
2
Contact b
4. High-efficiency 4-gap balanced
armature structure
(2a2b, 3a1b, 4a4b types)
The use of high-efficiency magnetically polarized circuits Does away with return faults due to fatigue
and 4-gap balanced armature structure means that
springs are not required.
or breakage of the return spring, especially
stoppage during contact states.
Independent COM enables differing pole
circuit configurations. This makes it
possible to design various kinds of control
circuits and safety circuits.
5. 2a2b contact
3a1b contact
4a4b contact
Structure with independent COM contact of (2a2b),
(3a1b), (4a4b) contacts.
261
SF
THE OPERATION OF SF RELAYS (when contacts are welded)
SF relays work to maintain a normal operating state even when overloading or short-circuit currents occur. It is also easy to include
weld detection circuits and safety circuits in the design to ensure safety even if contacts weld.
1) 2a2b Type
Form “b” Contact Weld
If the form “b” contacts (Nos. 1 and 3) weld, the armature becomes non-operational and the contact gap of the two form “a” contacts
is maintained at greater than 0.5 mm .020 inch. Reliable isolation is thus ensured.
If the No. 1 contact welds.
No.4
No.3
No.1
No.2
No.4
No.3
No.1
No.2
A gap of greater than 0.5 mm .020 inch is main-
tained at each of the two form "a" contacts (Nos.
2 and 4).
Non-energized
Energized (when no. 1 contact is welded)
Form “a” Contact Weld
If the two form “a” contacts (Nos. 2 and 4) weld, the armature becomes non-operational and the gap between the two form "b"
contacts is maintained at greater than 0.5 mm .020 inch. Reliable isolation is thus ensured.
No.4
No.3
No.1
No.2
No.4
No.3
No.1
No.2
If the No. 2 contact welds.
Each of the two form "b" contacts (Nos. 1 and 3)
maintains a gap of greater than 0.5 mm .020 inch.
Energized
Non-energized (when no. 2 contact is welded)
Contact Operation Table
The table below shows the state of the other contacts when the current through the welded form “a” contact is 0 V and the rated
voltage is applied through the form “b” contact.
Contact No.
Contact No.
State of other contacts
1
2
3
4
No.4
No.3
No.1
No.2
1
2
3
4
>0.5
>0.5
Welded
terminal
No.
>0.5: contact gap is kept at min. 0.5 mm .020 inch
Empty cells: either closed or open
>0.5
>0.5
>0.5
>0.5
>0.5
>0.5
Note: Contact gaps are shown at the initial state.
If the contacts change state owing to loading/breaking
it is necessary to check the actual loading.
Contact No.
Terminal No.
No.1
No.2
7–8
No.3
5–6
No.4
9–10
11–12
262
SF
2) 3a1b Type
Form “b” Contact Weld
If the form “b” contact (No. 3) welds, the armature becomes non-operational, the contact gaps at the three form “a” contacts are
maintained at greater than 0.5 mm .020 inch. Reliable isolation is thus ensured
If the No. 3 contact welds.
Each of the two form “a” contacts (Nos. 1, 2, and
4) maintain a gap of greater than 0.5 mm .020
inch.
No.4
No.3
No.1
No.2
No.4
No.3
No.1
No.2
Non-energized
Energized (when no. 3 contact is welded)
Form “a” Contact Weld
When the form “a” contacts (nos. 1, 2, and 4) weld, the armature remains in a non-returned state and the contact gap at the single
form “b” contact is maintained at greater than 0.5 mm .020 inch. Reliable isolation is thus ensured.
No.4
No.3
No.1
No.2
No.4
No.3
No.1
No.2
If the No. 2 contact welds.
The single form “b” contact (No. 3) maintains a
gap of greater than 0.5 mm .020 inch.
Energized
Non-energized (when no. 2 contact is welded)
Contact Operation Table
The table below shows the state of the other contacts when the current through the welded form “a” contact is 0 V and the rated volt-
age is applied through the form “b” contact.
Contact No.
State of other contacts
Contact No.
1
2
3
4
No.4
No.3
No.1
No.2
1
>0.5
>0.5
Welded
terminal
No.
>0.5: contact gap is kept at min. 0.5 mm .020 inch
Empty cells: either closed or open
2
3
4
>0.5 >0.5
>0.5
>0.5
Note: Contact gaps are shown at the initial state.
If the contacts change state owing to loading/breaking
it is necessary to check the actual loading.
Contact No.
Terminal No.
No.1
No.2
7–8
No.3
5–6
No.4
9–10
11–12
263
SF
3) 4a4b Type
Internal Contacts Weld
If the internal contacts (nos. 2, 3, 6, and 7) weld, the armature becomes non-operational and the contact gaps of each of the four form
“a” contacts are maintained at greater than 0.5 mm .020 inch. Reliable isolation is thus ensured.
No.8
No.7
No.1
No.2
No.8
No.7
No.1
No.2
If the No. 2 contact welds.
Each of the four form "a" contacts (Nos. 1, 3, 5,
and 7) maintains a gap of greater than 0.5 mm
.020 inch.
No.6
No.5
No.3
No.4
No.6
No.5
No.3
No.4
Non-energized
Energized (when no. 2 contact is welded)
External Contacts Weld
If the external contacts (nos. 1, 4, 5, and 8) weld, gaps of greater than 0.5 mm .020 inch are maintained between adjacent contacts
and the coil returns to an non-energized state.
If the No. 1 contact welds.
No.8
No.7
No.1
No.2
No.8
No.7
No.1
No.2
The adjacent No. 2 contact maintains a gap of
greater than 0.5 mm .020 inch. The other con-
tacts, because the coil is not energized, return to
their normal return state; each of form “a” con-
tacts (nos. 3, 5, and 7) maintains a contact gap of
greater than 0.5 mm .020 inch; each of the form
“b” contacts (nos. 4, 6, and 8) return to a closed
state.
No.6
No.5
No.3
No.4
No.6
No.5
No.3
No.4
Non-energized (when no. 1 contact is welded)
Energized
If external connections are made in series.
Even if one of the contacts welds, because the
other contacts operate independently, the contact
gaps are maintained at greater than 0.5 mm .020
inch.
Weld
Energized
Contact gap
min 0.5 mm .020 inch
Non-energized
Contact Operation Table
The table below shows the state of the other contacts when the current through the welded form “a” contact is 0 V and the rated volt-
age is applied through the form “b” contact.
Contact No.
Contact No.
State of other contacts
1
2
3
4
5
6
7
8
No.8
No.7
No.1
No.2
1
2
3
4
5
6
7
8
>0.5 >0.5
>0.5
≠
>0.5
>0.5
≠
>0.5
>0.5
≠
>0.5: contact gap
is kept at min. 0.5
mm .020 inch
≠: contact closed
Empty cells: either
closed or open
>0.5
>0.5
>0.5
>0.5
>0.5
>0.5
>0.5
≠
Welded
terminal
No.
No.6
No.5
No.3
No.4
≠
>0.5 >0.5
≠
>0.5
≠
≠
>0.5
>0.5
≠
>0.5
>0.5
≠
>0.5 >0.5
>0.5
Contact No. No.1 No.2 No.3 No.4 No.5 No.6 No.7 No.8
Terminal No. 13–14 5–6 9–10 17–18 19–20 11–12 7–8 15–16
>0.5
>0.5
>0.5
>0.5
>0.5
>0.5
≠
≠
>0.5 >0.5
Note: Contact gaps are shown at the initial state.
If the contacts change state owing to loading/breaking it is necessary to check the actual loading.
For Cautions for Use, see Relay Technical Information (Page 48 to 76).
9/1/2000
All Rights Reserved, © Copyright Matsushita Electric Works, Ltd.
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