SIRUS 3RQ3 coupling relays in narrow design are used to connect control signals from and to a PLC, and they are available in different versions:

• Coupling relays with relay output (not plug-in)
• Coupling relays with plug-in relays
• Coupling relays with semiconductor output (not plug-in)

Coupling relays with relay output (not plug-in)

AC and DC operation

IEC 60947‑5‑1, DIN EN 60947‑5‑1

The input and output coupling relays differ with regard to the positioning of the terminals and the LED.

Coupling relays with plug-in relays

AC and DC operation

IEC 60947‑1

These coupling relays are plug-in so that the relay can be replaced quickly at the end of its service life without detaching the wiring.

Coupling relays with semiconductor output (not plug-in)

AC and DC operation

IEC 60947‑1, EN 60664‑1 and EN 50005; 
Coupling relays with semiconductor output: EN 60747-5; 
programmable controllers: IEC 61131‑2

The input and output coupling relays differ with regard to the positioning of the terminals and the LEDs.

The coupling relays with semiconductor output have extremely high contact reliability, and are therefore particularly well suited for solid-state systems.

For test purposes, versions are available with manual-0-automatic switches.

Spring-type terminal with push-in functionality

Push-in connections are a form of spring-loaded terminals allowing fast wiring without tools for rigid conductors or conductors equipped with end sleeves.

As with other spring-type terminals, a screwdriver (with 3.0 x 0.5 mm blade) is required to disconnect the conductor. The same tool can also be used to wire fine-stranded conductors with no end finishing.

The advantages of the push-in terminals are found, as with all spring-type terminals, in speed of assembly and disassembly and vibration-proof connection. There is no need for the checking and tightening required with screw terminals.

Note:

Conversion tool, e.g. from 3TX7 to 3RQ3, see http://www.siemens.com/sirius/conversion-tool.

Article No. scheme

Note:

The Article No. scheme is presented here merely for information purposes and for better understanding of the logic behind the article numbers.

• All versions with screw or spring-type terminals (push-in technology)
• Top wiring with spring-type terminals (push-in) for fast and secure wiring.
• Low space requirements in the control cabinet thanks to a consistent width of 6.2 mm
• Reduced inventory due to low variance
• Functional state of the coupling relay clearly indicated by green LED
• Integrated reverse polarity protection and EMC arc-suppression diode
• Uniform accessories throughout the entire 3RQ3 series
• Integrated jumper option using connecting comb for all terminals
• Galvanic isolation plate for isolating different voltages for neighboring units
• Clip-on labels available as plotter matte paper for individual printing

Coupling relays with relay output (not plug-in)

• Permanently soldered relays for increased contact reliability
• Device variants with hard gold-plated contacts providing high contact reliability at low currents

Coupling relays with plug-in relays

• Fast replacement of the relays with existing wiring
• Tested complete units → lower assembly time
• Individual relays available as spare parts
• Device variants with hard gold-plated contacts providing high contact reliability at low currents

Coupling relays with semiconductor output (not plug-in)

• Long service life as there is no mechanical wear
• High switching frequency thanks to short make and break times
• Insensitive to vibrations
• No contact bounce
• Maximum contact reliability
• Noise-free switching
• Low control power required
• Switching of DC and capacitive loads

• Galvanic isolation between input and output circuit
• Adjustment to different signal levels
• Signal amplification

Motor control application example

Coupling relays with relay output (not plug-in)

3RQ30.8

Coupling relays with plug-in relays

3RQ3118

Coupling relays with semiconductor output (not plug-in)

3RQ305.-.S.30

3RQ305.-.SM.0, 3RQ3070-.S.30

3RQ3052-.SM50

3RQ3065-.SM30

The 3TX7014‑7B.0. replacement modules below are available as spare parts for 3RQ3118 coupling relays with plug-in relays. You will find these modules in the accessory ordering data.

-- = not available
✓ = available