Siemens SIRIUS System Manual

3RH, 3TX, LZX coupling links
SIRIUS System Manual
GWA 4NEB 430 0999-02b
6-11
Mechanical require-
ments
• Construction type, width
• Mounting type
• Indicators
• Connection type
• Replaceability
Selection table
The following table provides an overview of the main criteria for selection
from different device groups:
Device group Criteria for selection
Two-tier coupling links • Space-saving due to narrow housing width
• Test switches
Coupling links in box terminal
format
• Low device height
• For installation given narrow tier spacing
Contactor relays for switching
main and auxiliary circuits
• High switching currents
• Direct switching of motors up to 11 kW
• Up to 4 auxiliary contacts
Plug-in relay coupling links • High switching currents
• Quickly interchangeable
• Up to 4 changeover contacts
Coupling links for attachment
to contactors
• Attachable directly onto the contactor
• Technical specifications of the contactor to be con-
trolled
Table 6-4: Selection criteria for the 3RH, 3TX, and LZX coupling links

Siemens SIRIUS Specifications

General

Product brand name	Siemens
Series	SIRIUS
Coil Voltage	24V DC, 110V AC, 230V AC
Switching Capacity	Up to 10A
Mounting Type	DIN rail
Product designation	SIRIUS
Contact Material	Silver alloy
Contact Rating	Varies depending on the specific SIRIUS relay model (e.g., 6 A at 250 V AC, 10 A at 250 V AC)
Switching Voltage	Varies depending on the specific SIRIUS relay model (e.g., 250 V AC, 400 V AC)
Mechanical Life	Up to 10 million operations
Electrical Life	Up to 100, 000 operations
Operating Temperature	-25°C to +55°C
Protection Class	IP20
Size of relay base	Varies depending on the specific SIRIUS relay model