Product Overview

3RT1 contactors/3RH1 control relays
SIRIUS System Manual
3-90 GWA 4NEB 430 0999-02 DS 01
3.4.1.3 Auxiliary switches that can be attached to 3RH1 control relays
The 3RH1 control relays can be expanded by up to 4 contacts using attach-
able auxiliary switch blocks.
Definition:
DINEN50011
The main standard for the designation of switching elements for the control
relays is EN 50 011, which defines the terminal markings, identification num-
bers, and identification letters of certain control relays using a specific
sequence of the switching elements. The number, type, and position of the
switching elements must be specified using an identification number fol-
lowed by an identification letter.
In the case of 8-pole control relays, the letter "E" means that four NO con-
tacts have to be arranged on the lower (rear) contact level.
Expansion using auxil-
iary switch blocks
The following example of an control relay with 4 NO contacts (contact desig-
nation in acc. with EN 50 011 and EN 50 005) explains how auxiliary switch
blocks are added on:
Fig. 3-46: Auxiliary contacts for control relays
Hilfsschütze
DIN EN50 005,
8 oder 6 Kontakte
NSB00067
identification no.
31E, 22E
identification no. 40E
identification no. 80E,
71E, 62E, 53E, 44E
auxiliary switch blocks,
4 contacts
identification no.
40, 31, 22, 20, 11, 02
auxiliary switch blocks,
4 or 2 contacts
identification no. 80E,
71E, 62E, 53E, 44E
auxiliary contacts,
DIN EN 50 011
8 contacts
identification no.
40, 31, 22, 20, 11, 02
auxiliary contacts,
DIN EN 50 005,
8 or 6 contacts
auxiliary contactors,
DIN EN 50 011, 4 contacts