Panasonic is part of a large worldwide groupselling relays and associated switching products under different brand names in different territories.The conditions of use in some territories may differ from those customary in Europe. In particular there are often major differences in regard to national and international specifications, such as UL, CSA, VDE, SEV, EVE, SEMKO, etc. Thus, when considering contact loads as stated in this catalogue (e.g. 10 A, 30 VDC for the SP relay) its hould be understood that these values are not necessarily an absolute maximum but tested ratings. Mostly the stated value has been tested for a certain life expectancy as stated by the manufacturer or the respective test house. Thus, under different conditions, the stated “maximum” may, in practice, be safely exceeded.
Thismakesit possibletodesign
variouskindsofcontrol circuitsandsafetycircuits. Theoperation
ofeachcontact isregulatedbythemovementoftheothercontact. Contact rating FileNo. Rating FileNo.SF2D
SAFETY STANDARDS
UL/C-UL(Recognized) TÜV(Certified) SEV
FileNo. Forcedoperationmethod
(2FormA2FormB,
4FormA4FormBtypes)
Evenwhenonecontactisweldedclosed,theother
maintainsagapofgreaterthan0.
Asshownonthediagramontheleft,evenifthe
operatingspringsnumbered1and2thereisno
shortingbetween“a”and“b”contacts.
Independent COMenablesdifferingpolecircuit
configurations.020inch.
Inthediagramontheleft, thelowercontact “b”have
weldedbuttheuppercontact “a”maintainatagapof
greaterthan0.
Card
Contacta
ds 61404 sf2d: 180413D 571
Safety
. Separatechambermethod
(2FormA2FormB,
4FormA4FormBtypes)
Caseseparator
4^ 5ssD _
Preventsshortingandfusingofspringsandspring
failureowingtoshort-circuit current. Contact rating
E120782* 6A250VAC
6A24VDC
968EZ116.
3.5mm.
2.0001 (SF4D)
8A24VDC
6A230VAC
01,1851 6A230VAC
6A24VDC
*CSAstandard: CertifiedbyC-UL
SAFETY STRUCTURE RELAYS
T t
s d
c e
w g
a s
( r
d ,
a l
i ,
s e
s ,
f e
a d
r f
e .0001 (SF2D)
968EZ113.
Structure Operation
1.
Subsequentcontact movementissuspendedandthe
weldcanbedetected
Thetwocontacts“a”and“b”arecoupledwiththesamecard. 2FormA2FormBcontact
4FormA4FormBcontact
Structurewithindependent COMcontact of2FormA2FormBand
4FormA4FormBcontacts.020inch.
Inindependentchambers,thecontacts“a”and“b”arekeptapart byabody/
caseseparatororbythecarditself.5mm
