Siemens sirius System Manual page 161

Electronically opti-
mized auxiliary switch
blocks
Auxiliary contacts
Adding to the auxiliary
contacts
SIRIUS System Manual
GWA 4NEB 430 0999-02b
The electronically optimized auxiliary switch blocks contain enclosed switch-
ing elements that are particularly suitable for switching low voltages and
currents (hard gold-plated contacts) as well as for use in dusty atmospheres.
The rated operational current is I
to 60 V.
The electronically optimized auxiliary switch blocks are available as screw-
type or Cage Clamp terminal types:
• Frame size S00 (3RH1911-.NF..): Has two enclosed auxiliary contacts (1
NO contact + 1 NC contact, 2 NO or 2 NC contacts
• Frame sizes S0 to S3 (3RH1921-.FE22): Has two enclosed auxiliary con-
tacts and two standard auxiliary contacts, each 1 NO contact + 1 NC con-
tact
• The switched current is in acc. with the VDE 0435 regulation for relays.
The following table gives you an overview of all the available auxiliary con-
tacts:
Auxiliary contacts and atta-
chable accessories
Integrated auxiliary contact
4-pole auxiliary switch
2-pole auxiliary switch
1-pole auxiliary switch
1-pole auxiliary switch (infeed
from 1 side)
2-pole auxiliary switch (infeed
from 1 side)
2-pole auxiliary switch
Time-delay auxiliary switch
blocks
Electronically optimized auxil-
iary switches
Table 3-22: Auxiliary switch blocks
• The 3RT10 basic units of frame size S00 with an integrated auxiliary con-
tact can be supplemented with up to 4 contacts using attachable auxiliary
switches.
• The basic units of frame sizes S0 to S3 do not have any auxiliary switches,
but auxiliary switches can be attached at the front or the side.
/AC-14 and DC-13: 1 to 300 mA, voltage: 3
e
Frame size S00
1 integrated auxiliary
contact
Attachable at the front
Attachable at the front
---
Attachable at the front
Attachable at the front
---
Attachable at the front
Attachable at the front
3RT1/3RH1 contactors
Frame sizes S0 to S3
---
Attachable at the front
---
Attachable at the front
---
Attachable at the front
Attachable at the side
Attachable at the front
Attachable at the front
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