Terminal Markings Of The Contactors And Auxiliary Contactors Combined With Auxiliary Switch Blocks; Figure 3-35: Auxiliary Contacts, Contactors For Switching Motors (Frame Sizes S0 To S3); Table 3-22: Auxiliary Switch Blocks - Siemens sirius System Manual

Auxiliary contacts S0 to
S3
3.4.1.2 Terminal markings of the contactors and auxiliary contactors combined with auxiliary
switch blocks
Terminal markings in
acc. with EN 50 005
Identification numbers
(DIN EN 50 005)
SIRIUS System Manual
GWA 4NEB 430 0999-02b
The following graphic shows you the auxiliary contacts that can be used to
expand the contactors of frame sizes S0 to S3 (terminal marking in acc. with
EN 50 005 or EN 50 012):
4-pole auxiliary switch blocks
contactors
3RT10 2.
3RT10 3.
3RT10 4.
without auxiliary
contact
auxiliary switch blocks,
with 4 contacts 3RH19 21-. FA..
in acc. with DIN EN 50 005
identification no. 40, 31, 22,
04, 22U
contactor arrangements
with a 4-pole auxiliary switch
block, terminal markings
in acc. with DIN EN 50 005
identification no. 40, 31, 22, 02

Figure 3-35: Auxiliary contacts, contactors for switching motors (frame sizes S0 to S3)

The terminal markings for contactors are defined in EN 50 005 that contains
general directives. The following summarizes the basic rules that apply to
switching elements of auxiliary circuits:
• The terminals of auxiliary contact elements are designated by two-digit
numbers.
• The digit in the unit place is a function number (NC contact: 1 and 2,
NO contact: 3 and 4).
• The digit in the tens place is a sequence number (all the switching ele-
ments of the same function must have different sequence numbers).
The identification numbers mean:
Switching devices with a fixed number of auxiliary contact elements (NO
contacts or NC contacts) can be assigned a two-digit identification number.
The first digit represents the number of NO contacts and the second one
the number of NC contacts.
There is no information on the sequence of NO contacts and NC contacts in
the contactor/auxiliary contactor.
Note
The identification numbers on the auxiliary switch blocks only apply to the
attached auxiliary switches.
1-pole aux. switch blocks
auxiliary switch blocks,
with 4 contacts 3RH19 21-. HA..
in acc. with DIN EN 50 012
identification no. 31, 22, 13
contactor arrangements with
a 4-pole auxiliary switch block,
terminal markings
in acc. with DIN EN 50 012
identification no. 31, 22, 13
3RT1/3RH1 contactors
contactors
3RT10 2.
3RT10 3.
3RT10 4.
without
auxiliary contact
auxiliary switch blocks,
with 1 contact
1 NO 1 O
possible contactor
arrangements with 1-pole
auxiliary switch blocks,
terminal markings in acc. with
DIN EN 50 005 or
DIN EN 50 012
identification numbers:
01, 10
11
21, 12
31, 22, 13
02, 20
03, 30
04, 40
3-59