Brochure

SIRIUS
Siemens Industry, Inc. Industrial Control Product Catalog 2017
2/22
2
COnTACTORS And
ASSEMbliES
Siemens / Industrial Controls Previous folio: IC10 2/18
3RT20 2. -1A .00
3RT10 7. -6A ..6 3RH29 21. -1F 3RH29 21. -1DA 11
3RH21
3RH24 3RH2911-2HA..
Frame
size Contactors Auxiliary contact block
S00
3RT201
3RH29113RT231
3RT251
3RT261 3RH1911
S0
3RT202
3RH29213RT232
3RT252
3RT262 3RH2921
S2
3RT203
3RH2921
3RT233
3RT253
3RT263
S3
3RT204
3RH2921
3RT234
3RT244
3RT264
S6
3RT105
3RH1921
3RT145
S10
3RT106
3RH19213RT126
3RT146
S12
3RT107
3RH19213RT127
3RT147
3TF6 3TY7561-1UA00
Frame
size Control Relays Auxiliary contact block
S00
3RH21
3RH2911
3RH24
3TH20 3TX44
For contactors, see pages 2/8-2/9.
For auxiliaries contact blocks, see pages
2/66 -2/68.
For control relays, see pages 2/50-2/52.
For auxiliaries contact blocks, see page 2/66- 2/68..
Applications
“Safety” Contactors
Safety rated contactors are
required to have mirrored
contact construction accord-
ing to IEC 60947-4-1 Annex F.
A mirror contact is a Normally
Closed (NC) auxiliary contact
which can not be closed simul-
taneously with a Normally Open
(NO) main contact.
In some industries, such as
automotive, requirements have
been established that a safety
rated contactor must also have
permanently mounted auxiliary
contact blocks. See page 2/23
for Contactors with permanently
mounted auxiliary contacts.
Siemens Contactors for
“Safety” applications:
All Siemens standard 3RT, 3TF6,
40HN & 40PH Contactors are
provided with positively driven
(mirror) contacts which meet or
exceed the criteria for “Safety
Contactors” according to IEC
60947-4 Annex F which
describes the requirements for
mirror contact performance.
When applying Safety Contac-
tors in safety circuits, the NC
auxiliary contacts must be wired
in series or parallel and must
be used as monitoring contacts
with feedback to the safety
evaluation device (i.e. safety
relay or failsafe logic controller).
“Safety” Control Relays
Safety rated control relays
are required to have positively
driven contact elements
according to IEC 60947-5-1
Annex L. Positively driven con-
tact elements are a combination
of NO auxiliary contacts and NC
auxiliary contacts whose con-
struction prevents them from
being closed simultaneously.
In some industries, such as
automotive, requirements have
been established that a safety
rated control relays must also
have permanently mounted
auxiliary contact blocks. See
page 2/18 for Control Relays
with permanently mounted
auxiliary contacts.
Siemens Control Relays for
“Safety” applications:
All SIRIUS 3RH control relays
(with at least 1 NC contact)
meet or exceed the criteria for
“Safety Control Relays” accord-
ing to IEC 60947-5-1 Annex L.
This is true for the basic 3RH
relay with or without an addi-
tional auxiliary contact block.
Contactors and Contactor Assemblies
Contactors & Relays for Safety Applications
3RT, 3TF safety contactors and 3RH2, 3TH2 safety control relays
Product Category IEC