Siemens SIRIUS System Manual

3RH, 3TX, LZX coupling links
SIRIUS System Manual
GWA 4NEB 430 0999-02b
6-3
6.2 Device description
Coupling links are interface modules that enable optimal adaptation
between electronic controllers and I/O devices, both on the sensor and the
actuator side.
They also provide electrical isolation.
Overview
The following table offers an overview of the device groups and their distin-
guishing features:
Table 6-2: 3RH, 3TX, LZX coupling links - overview of the device groups with their distinguishing
features
Contact material
Relay coupling links are offered with AgNi and hard gold-plated contacts.
Hard gold-plated contacts have greater contact reliability at low voltages and
currents. They can be used as of mV or
µ
A. They can be used to switch low
levels of power, such as those involved in measurement and control signals.
In the case of input coupling links, they are to be recommended on account
of the low currents of the input modules of controllers.
Device group Distinguishing features
Two-tier coupling links
3TX7004/3TX7005
Relay couplers:
6.2 to 22.5 mm width, contact elements: 1 to 3 normally
open contacts, 1 to 2 changeover contacts
Multi-channel devices
Semiconductor couplers:
6.2 to 12.5 mm width
Long service life, high switching frequency
Screw-type terminal (3TX7004)
Cage Clamp terminal (3TX7005)
Box terminals
3TX7002/3TX7003
Relay couplers:
Contact elements: 1 to 2 normally open contacts, 1 to 2
changeover contacts, low device height
Semiconductor couplers:
Long service life, high switching frequency
Screw-type terminal (3TX7002)
Cage Clamp terminal (3TX7003)
Plug-in relay coupling links
LZX: RT/PT/MT
Plug-in relays (1 to 4 changeover contacts)
High switching currents, prewiring possible
Coupling links for direct
attachment to contactor
coils
3RH1924/3TX4090/3TX7090
Space-saving, adapted to contactor type,
reduced wiring
3RH1924 for frame sizes S0 to S3
3TX4090 for 3TH42/43 auxiliary contactors
3TX7090 for frame sizes 3 to 14
SIRIUS
contactor relays3RT10
3RH11
For main circuits: switching from motors to 11 kW directly
For main circuits: up to 4 auxiliary switches

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