Finder 7S.23.9.024.0210 – 7S Series Relay modules with forcibly guided contacts

Why Choose the Finder 7S.23.9.024.0210 Forcibly Guided Safety Relay?

The Finder 7S.23.9.024.0210 is a compact 24 V DC modular safety relay with forcibly guided contacts, designed for industrial automation, machinery control and safety-related electrical systems. Part of the Finder 7S Series, this three-pole relay combines a 2 normally open (NO) + 1 normally closed (NC) contact configuration, a 10 A contact rating and screw terminal connections in a slim DIN rail-mounted housing.

The relay's forcibly guided contact mechanism provides a defined mechanical relationship between the normally open and normally closed contacts. This allows appropriately designed monitoring circuits to detect certain relay contact failures, including welded contacts, helping engineers implement diagnostic feedback within safety-related control systems.

Designed for a 24 V DC nominal coil supply, the Finder 7S.23.9.024.0210 is suitable for compatible industrial control circuits. Its contacts have a 250 V AC nominal switching voltage and use gold-plated silver nickel (AgNi + Au) contact material.

With a housing width of just 17.5 mm, the relay offers a space-saving solution for industrial electrical cabinets. The 35 mm DIN rail mounting, screw terminals and integrated LED coil status indicator support straightforward installation, commissioning and maintenance.

The Finder 7S.23.9.024.0210 is suitable for use as a component in appropriately designed safety-related systems, including machinery control circuits, monitored relay outputs and industrial automation panels. It is not a complete standalone safety controller.

Key Advantages

• Forcibly guided contacts: Support detection of specified contact failures through appropriately designed monitoring circuits.
• 24 V DC coil: Compatible with a commonly used industrial control supply voltage.
• 2 NO + 1 NC contact arrangement: Provides two normally open switching contacts and one normally closed contact.
• 10 A rated contact current: Suitable for switching appropriately rated industrial control loads.
• 250 V AC nominal switching voltage: Supports compatible AC switching applications.
• Gold-plated silver nickel contacts: Combines AgNi contact material with gold plating.
• Compact 17.5 mm width: Saves valuable space inside control panels.
• 35 mm DIN rail mounting: Enables convenient installation in electrical cabinets.
• Screw terminals: Provide conventional conductor termination.
• LED coil status indication: Helps identify relay energisation during commissioning and fault finding.
• Defined coil operating range: Specified for 16.8 to 30 V DC operation.
• Fast switching: Typical operate and release times of 7 ms and 11 ms.
• Mechanical durability: Rated for 10 million mechanical operations.
• Wide operating temperature range: Suitable for -40 °C to +70 °C environments.
• IP20 protection: Designed for installation within suitable electrical enclosures.
• EN 61810-3 contact guidance: Class A forcibly guided contact construction for safety-related applications.

Key Features

• Manufacturer: Finder.
• Product series: 7S Series.
• Manufacturer part number: 7S.23.9.024.0210.
• Alternative product code: 7S2390240210.
• Product type: Modular relay with forcibly guided contacts.
• Nominal coil voltage: 24 V DC.
• Coil operating range: 16.8 to 30 V DC.
• Contact configuration: 2 NO + 1 NC.
• Total number of contacts: 3.
• Rated contact current: 10 A.
• Nominal switching voltage: 250 V AC.
• Contact material: Silver nickel with gold plating (AgNi + Au).
• Coil power: 0.9 W, according to the Finder Series 7S technical overview.
• Typical operate time: 7 ms.
• Typical release time: 11 ms.
• Mechanical durability: 10 million operations.
• Electrical endurance: 100,000 operations under specified test conditions.
• Connection type: Screw terminals.
• Mounting: 35 mm DIN rail.
• Housing width: 17.5 mm.
• Ingress protection: IP20.
• Operating temperature: -40 °C to +70 °C.
• LED coil status indicator: Integrated.
• EAN / GTIN: 8012823418131.

Forcibly Guided Contacts for Safety-Related Monitoring

The main feature of the Finder 7S.23.9.024.0210 is its forcibly guided contact construction. This provides a mechanical relationship between the normally open and normally closed contacts that supports fault monitoring in safety-related control systems.

If a normally open contact becomes welded closed, the linked normally closed contact is prevented from returning to its normal closed state under the specified fault condition. A correctly designed external monitoring circuit can detect this behaviour and respond according to the system's safety requirements.

The relay provides two normally open contacts for suitably rated switching functions and one normally closed contact that can be used as part of a feedback or monitoring arrangement.

The contact construction follows the Class A forcibly guided contact principle of EN 61810-3. The relay is suitable for integration into safety-related circuits, but its use alone does not establish a particular performance level or safety integrity level for the complete machine.

Safety performance depends on the full system design, including input devices, logic, diagnostic coverage, fault response and validation.

2 NO + 1 NC Contact Arrangement with 10 A Switching Capability

The Finder 7S.23.9.024.0210 has a three-contact configuration consisting of two normally open contacts and one normally closed contact.

Its 10 A rated contact current and 250 V AC nominal switching voltage make it suitable for appropriately rated control loads. The actual permissible load depends on the electrical characteristics of the connected equipment and the applicable switching category.

The relay uses silver nickel contacts with gold plating, providing a contact construction suited to the specified industrial relay applications.

The manufacturer's specified mechanical durability of 10 million operations and electrical endurance of 100,000 operations under defined test conditions provide useful reference points when assessing expected service life.

Where the relay is used in a monitored control circuit, the normally closed feedback contact should be connected and evaluated according to the safety system design.

24 V DC Coil Operation and LED Status Indication

The 24 V DC coil is designed for industrial control systems using a regulated DC supply. The Finder 7S Series technical overview specifies a coil operating range of 16.8 to 30 V DC for this version.

Coil power is listed as 0.9 W in the Finder Series 7S technical overview. Some component distributor databases report different coil power values, so designers requiring precise coil loading should confirm the value against the current manufacturer datasheet and the actual device marking.

The relay has typical operate and release times of 7 ms and 11 ms, respectively. These figures describe relay response under specified conditions and should not be treated as the stopping time of a complete machine safety system.

The integrated LED coil status indicator helps technicians identify whether the relay coil is energised during testing, commissioning and fault diagnosis.

Space-Saving DIN Rail Installation and Screw Terminal Wiring

The Finder 7S.23.9.024.0210 mounts onto a standard 35 mm DIN rail according to EN 60715, making it suitable for installation inside industrial control cabinets and machinery electrical enclosures.

Its compact 17.5 mm width helps conserve panel space, while the 89.8 mm height and 60.8 mm depth support integration into suitably sized enclosures.

The relay uses screw terminal connections. Conductors should be prepared and terminated according to Finder's wiring instructions, including the specified tightening torque and conductor sizes.

During installation, the normally open and normally closed contacts must be identified correctly. This is especially important where the NC contact forms part of an external feedback monitoring circuit.

The device has an IP20 protection rating and should be installed within a suitable electrical enclosure. It is not intended for direct exposure to water, dust or outdoor weather conditions.

Before commissioning a safety-related circuit, the complete installation should be tested for correct switching, feedback operation, fault response and restart behaviour.

Typical Applications

• Industrial machinery safety-related control circuits.
• Emergency-stop systems incorporating appropriate safety monitoring.
• Machine control panels.
• Industrial automation cabinets.
• Safety relay expansion and interface circuits.
• Forcibly guided contact feedback circuits.
• Automated production machinery.
• Industrial conveyor systems.
• Packaging and processing machinery.
• Material handling equipment.
• Machine tool control systems.
• Industrial equipment maintenance and refurbishment.
• 24 V DC control circuits requiring monitored switching.
• Applications requiring 2 NO + 1 NC forcibly guided contacts.