Siemens SIRIUS 3RQ1 Force-Guided Coupling Relays

Siemens SIRIUS 3RQ1 Force-Guided Coupling Relays Suppliers,Exporters in India

ARP IMPEX is a supplier and exporter of Siemens SIRIUS 3RQ1 Force-Guided Coupling Relays in India. We handle requirements for safety control panels, machine automation, elevators, railway signalling, industrial doors, conveyor systems and output expansion of Siemens SIRIUS 3SK safety relays.

The Siemens 3RQ1 is used where a control signal must be transferred through mechanically linked safety contacts. It can isolate a controller output, increase the number of available contacts, convert the control voltage or switch an actuator that the controller cannot operate directly.

Unlike an ordinary coupling relay, the normally open and normally closed contacts inside the 3RQ1 are force-guided. The contacts are mechanically linked so that the NO and NC contacts cannot remain closed at the same time. This allows the control system to detect a contact that has failed to open and prevent unsafe switching.

The 3RQ1 range is certified for safety applications up to SIL 3 and Performance Level e, depending on the selected model and circuit arrangement. Siemens also provides variants for SIL 2 / PL c applications where a lower safety level is sufficient.

These relays are commonly installed between an F-PLC or safety relay and equipment such as contactors, brakes, valves, doors, motors or signalling devices. They protect the controller output while providing the contact capacity required by the connected load.

For Siemens SIRIUS 3RQ1 price and availability, share the complete Siemens article number, required quantity and destination country.

What the Siemens 3RQ1 Does

A safety controller may have only a limited number of output contacts or may not have enough switching capacity for the connected actuator. The 3RQ1 receives the controller signal and reproduces it through its own force-guided contacts.

It can be used for:

• Galvanic isolation between a controller and field equipment
• Expansion of safety relay output contacts
• Amplification of PLC or F-PLC output signals
• Conversion between different control voltages
• Direct switching of applicable electrical loads
• Feedback monitoring of the relay contact position
• Protection of controller outputs against voltage peaks and electrical interference

The feedback contact can be returned to the safety controller. If an output contact does not open correctly, the linked contact arrangement allows the controller to detect the condition before another machine cycle begins.

Siemens 3RQ1 Product Groups

Siemens 3RQ1000 Force-Guided Coupling Relays

The 3RQ1000 range includes standalone force-guided coupling relays for signal coupling, voltage conversion and contact expansion.

Depending on the complete part number, available contact arrangements include:

• 1 normally open and 1 normally closed contact
• 2 normally open and 1 normally closed contact
• 2 normally open and 2 normally closed contacts
• 4 normally open and 1 normally closed contact

Models are available with 24 V DC control supply or a wide-range 24–240 V AC/DC supply. Screw-terminal and spring-loaded push-in terminal versions are also available. Many 3RQ1000 variants are intended for safety applications up to SIL 2 / PL c.

The 3RQ1000 is relevant where the project needs a force-guided interface relay but does not require the full SIL 3 output-expansion arrangement.

Siemens 3RQ1200 Force-Guided Coupling Relays

The 3RQ1200 range covers force-guided coupling relays for higher safety requirements, including applications up to SIL 3 / PL e when used in the approved circuit.

These relays can be used as output expansion for Siemens SIRIUS 3SK safety relays and in other fail-safe control circuits. Variants are available with removable screw or push-in terminals and different control-voltage arrangements.

The exact safety level does not depend only on the relay model. It also depends on the complete wiring, feedback circuit, fault detection, controller and system design.

Technical Specifications

• Brand: Siemens
• Product range: SIRIUS
• Series: 3RQ1
• Product type: Force-guided coupling relay
• Main purpose: Safe signal coupling and contact expansion
• Safety application: Up to SIL 3 / PL e, depending on model and circuit
• Contact design: Mechanically linked NO and NC contacts
• Control supply options: 24 V DC or 24–240 V AC/DC, depending on model
• Contact arrangements: Depend on the complete article number
• Switching capacity: Up to 10 A on applicable contact arrangements
• Enclosure width: 17.5 mm or 22.5 mm
• Mounting depth: Approximately 90 mm
  Terminal options: Removable screw or push-in spring terminals
• Mounting: Standard DIN rail
• Device connection: Applicable versions connect with SIRIUS 3SK safety relays
• Status monitoring: Force-guided feedback contact
• Load contacts: Load-rated NO and NC contacts on applicable models
• Standards: Force-guided contacts according to IEC 60947-5-1 and IEC 61810-3
• Functional safety: IEC 61508 and ISO 13849, depending on model
• Approvals: Model-dependent international, railway, marine and industrial approvals

These are family-level specifications. Contact arrangement, switching current, supply voltage, safety level and terminal system must be checked from the complete Siemens 3RQ1 part number.

Features

• Force-guided NO and NC contacts for dependable status feedback
• Suitable for safety applications up to SIL 3 / PL e
• Detects welded or failed relay contacts through the feedback circuit
• Provides galvanic isolation between controller and field equipment
• Expands the number of available safety output contacts
• Increases the switching capacity of an F-PLC or safety relay output
• Suitable for direct switching of applicable actuators and signal devices
• Wide-range 24–240 V AC/DC versions reduce model variation
• Different NO and NC contact arrangements are available
• Load-rated normally closed contacts are available on applicable models
• Removable terminals allow permanent panel wiring
• Screw and push-in terminal versions are available
• Narrow 17.5 mm and 22.5 mm housings save panel space
• Can connect to Siemens SIRIUS 3SK safety relays
• Helps reduce wiring errors during 3SK output expansion
• Suitable for general signal coupling as well as fail-safe circuits
• International approvals support machinery and export projects
• Useful for new control panels and existing relay replacement

Use with Siemens SIRIUS 3SK Safety Relays.

The Siemens 3RQ1 can work as an output expansion module for a SIRIUS 3SK safety relay.

A safety relay may monitor an emergency-stop button, safety door or light curtain but have too few output contacts for all the connected contactors and actuators. A 3RQ1 can add force-guided contacts without using a normal general-purpose relay in the safety circuit.

Applicable versions connect through the Siemens device connector. This can reduce separate wiring between the 3SK safety relay and the 3RQ1 while helping prevent connection errors.

The safety level of the complete circuit must still be calculated and verified. Adding a 3RQ1 does not automatically make every control circuit SIL 3 or PL e.

Difference Between 3RQ1 and General Coupling Relays

The 3RQ1 is intended for applications where contact feedback and fault detection matter.
A general-purpose coupling relay may provide galvanic isolation, voltage conversion and signal amplification, but its contacts are not necessarily mechanically linked for safety monitoring.

The main differences are:

• SIRIUS 3RQ1: Force-guided contacts for safety-related and monitored circuits
• SIRIUS 3RQ2: Universal industrial coupling relay for normal PLC and control signals
• SIRIUS 3RQ4: Slim coupling relay range with relay, plug-in or semiconductor outputs

For an ordinary PLC interface without a safety requirement, a 3RQ2 or 3RQ4 may be more appropriate. For a safety output, emergency-stop circuit or monitored actuator, the project may require the force-guided 3RQ1.

Applications

• Siemens SIRIUS 3RQ1 Force-Guided Coupling Relays are used for:
• Emergency-stop control circuits
• Safety-door monitoring systems
• Machine guard interlocking
• Safety light-curtain circuits
• F-PLC output coupling
• SIRIUS 3SK safety relay output expansion
• Safety contactor control
• Motor shutdown circuits
• Brake control systems
• Industrial door control
• Elevator door and brake control
• Railway signalling systems
• Traffic-signal switching
• Conveyor safety systems
• Packaging machinery
• Machine tools
• Presses and production machinery
• Automated assembly lines
• Valve and actuator control
• Process-industry shutdown systems
• Burner and furnace safety circuits
• Crane and hoist safety controls
• Marine and shipbuilding control panels
• Railway equipment
• Infrastructure automation
• Industrial safety-panel replacement

Siemens identifies railway and signalling equipment, elevators, brakes, doors, traffic lights, conveyor systems, packaging machines and industrial production facilities among the applications for the 3RQ1 range.

Selecting the Correct Siemens 3RQ1 Relay

A request for “Siemens 3RQ1 Coupling Relay” does not identify one complete product.

The following points must be confirmed:

• Complete Siemens article number
• Required safety level
• Control supply voltage
• Number of normally open contacts
• Number of normally closed contacts
• Required switching current
• Screw or push-in terminal system
• Standalone use or 3SK output expansion
• Required industrial or railway approval
• Required quantity
• Destination country

For replacement requirements, also share a clear photograph of the existing relay label and terminal arrangement.

Do not replace a force-guided safety relay with a standard coupling relay only because the coil voltage and contact quantity appear similar. The contact design, safety data and feedback arrangement must match the approved circuit.

Siemens SIRIUS 3RQ1 Supplier and Exporter in India

ARP IMPEX supplies Siemens SIRIUS 3RQ1 Force-Guided Coupling Relays for machine manufacturers, safety-panel builders, system integrators, industrial plants, infrastructure contractors and export buyers.

We handle enquiries for Siemens 3RQ1000 coupling relays, Siemens 3RQ1200 safety coupling relays, force-guided relays for SIRIUS 3SK output expansion, SIL 3 / PL e interface relays and replacement of existing Siemens 3RQ1 devices.

The Siemens 3RQ1 price depends on the complete part number, contact arrangement, supply voltage, terminal type, safety level and required quantity.

Send the complete Siemens part number, required quantity and destination country for price, availability and export quotation.