Coupling Links For Direct Attachment; Sirius Contactor Relays; Installation - Siemens sirius System Manual

6.2.4 Coupling links for direct attachment

Contactors S0 to S3
Contactors of up to
450 kW
Variants

Installation

Surge suppression
Power consumption
LED

6.2.5 SIRIUS contactor relays

6.2.6 Installation
Attachment
SIRIUS System Manual
GWA 4NEB 430 0999-02b
The 3RH1924-1GP11 coupling relay, which is screwed directly onto the coil
terminals, is available for direct attachment to the contactors of frame sizes
S0 to S3.
The 3TX4090-0C/-0D coupling links are suitable for attachment to 3TH42/43
auxiliary contactors.
In the case of the large contactors of up to 450 kW (size 14), the 3TX7090
coupling link can be snapped on at the side like an auxiliary switch block,
and the wires are connected to the contactor coil terminals.
There are variants with one normally open contact, 24 VDC, with and with-
out surge suppression.
The operating range is 17 to 30 VDC.
The 3TX 4090 and 3RH1924-1GP11 coupling links are screwed directly onto
the contactor coil terminals, and the 3TX7090 coupling links are snapped on
at the side like the auxiliary switches.
The following coupling links have an integrated surge suppressor (varistor)
for the contactor coil to be switched:
• 3RH1924-1GP11
• 3TX4090-0D
• 3TX7090-0D
Following on from the technical specifications of the electronic systems, the
coupling links have low power consumption.
An LED is integrated in the coupler.
The SIRIUS 3RT10/3RH11 contactor relays are described in Chapter 3, "Con-
tactors".
Snap-on attachment
The coupling links can be snapped onto a 35 mm rail in acc. with
DIN EN 50 022.
Screw-on attachment is not possible.
3RH, 3TX, LZX coupling links
6-7