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參數(shù)資料
| 型號(hào)： | SF4 |
| 英文描述： | POLARISED, MONOSTABLE SAFETY RELAY with (mechanical linked) forced contacts operation |
| 中文描述： | 極化，單穩(wěn)態(tài)與安全繼電器（機(jī)械連接）強(qiáng)迫接觸行動(dòng) |
| 文件頁(yè)數(shù)： | 5/7頁(yè) |
| 文件大小： | 338K |
| 代理商： | SF4 |
262
SF
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.
Form “a” Contact Weld
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
.
No.4
No.3
No.1
No.2
Energized
No.4
No.3
No.1
No.2
Non-energized (when no. 2 contact is welded)
No.4
No.3
No.1
No.2
Contact No.
Terminal No.
No.1
11–12
No.2
7–8
No.3
5–6
No.4
9–10
State of other contacts
1
2
>0.5
>0.5
>0.5
>0.5
3
4
Welded
terminal
No.
1
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.
>0.5: contact gap is kept at min. 0.5 mm
.020 inch
Empty cells: either closed or open
Contact No.
Contact No.
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 Operation Table
1) 2a2b Type
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.
Form “b” Contact Weld
If the No. 1 contact welds.
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).
No.4
No.3
No.1
No.2
Non-energized
No.4
No.3
No.1
No.2
Energized (when no. 1 contact is welded)
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.
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|---|---|
| SF-4 | 功能描述:化學(xué)物質(zhì) SOLVENT DISP.SLEEVE RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Adhesives 類型:Epoxy Compound 大小:1.7 oz 外殼:Plastic Tube |
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