Finder 7S.14.9.048.4310 – 7S Series Relay modules with forcibly guided contacts

Why Choose the Finder 7S.14.9.048.4310 Safety Relay Module?

The Finder 7S.14.9.048.4310 is a professional 48 V DC safety relay module with Class A forcibly guided contacts, designed for industrial machinery, automation equipment and safety-related electrical control systems. Part of the Finder Series 7S, this compact DIN rail-mounted relay features a 3 normally open (NO) + 1 normally closed (NC) contact configuration, providing three switching contacts and one mechanically linked feedback contact.

With a 6 A rated current per contact, 250 V AC rated switching voltage and 48 V DC operating coil, the Finder 7S.14.9.048.4310 is designed for applications requiring dependable relay switching and contact monitoring. Its forcibly guided contact arrangement complies with EN 61810-3, supporting the detection of certain contact faults within correctly designed safety circuits.

The module incorporates screwless spring-clamp terminals, an integrated LED coil status indicator and a compact 22.5 mm DIN rail housing. Its industrial construction and four-contact arrangement make it particularly suitable for machinery safety interfaces, monitored switching circuits and safety relay expansion applications.

Key Advantages

• Class A forcibly guided contacts support fault detection in appropriately designed safety-related control systems.
• 3 NO + 1 NC contact configuration provides three normally open switching contacts and one normally closed feedback contact.
• 48 V DC coil voltage for compatible industrial control supplies.
• 6 A rated current per contact supports a variety of industrial control loads.
• 250 V AC rated switching voltage for suitable AC control circuits.
• Mechanically linked contacts help identify certain welded-contact faults through external monitoring.
• Screwless spring-clamp terminals simplify electrical installation and maintenance.
• Integrated LED indication provides convenient visual confirmation of coil energisation.
• Compact 22.5 mm module width helps conserve DIN rail space.
• 35 mm DIN rail mounting enables straightforward installation in industrial electrical enclosures.
• Silver-nickel contact technology supports dependable switching performance.
• Four-contact arrangement provides flexibility for monitored control and safety relay interface circuits.
• Industrial operating temperature range supports demanding machinery and automation environments.
• Suitable for safety-related applications when correctly integrated into an assessed and validated system.

Key Features

• Finder Series 7S modular relay with forcibly guided contacts.
• Type 7S.14 four-contact construction.
• Class A forcibly guided contacts according to EN 61810-3.
• 3 normally open contacts and 1 normally closed contact.
• 48 V DC nominal coil voltage.
• 38.4 to 57.6 V DC coil operating range.
• Approximately 13.5 mA rated coil current.
• Approximately 0.7 W rated coil power.
• 6 A rated current per contact.
• 250 V AC rated switching voltage.
• Maximum combined normally open contact current of 12 A, subject to manufacturer limits.
• Integrated LED coil status indication.
• Screwless spring-clamp electrical connections.
• 35 mm DIN rail mounting in accordance with EN 60715.
• 22.5 mm nominal module width.
• IP20 ingress protection rating.
• Designed for industrial safety-related switching and monitoring applications.

Class A Forcibly Guided Contacts for Safety-Related Control Systems

The key characteristic of the Finder 7S.14.9.048.4310 is its Class A forcibly guided contact arrangement. Unlike conventional relays, the normally open and normally closed contacts are mechanically linked to prevent them from simultaneously reaching their closed positions under specified fault conditions.

This construction allows appropriately designed monitoring circuits to identify certain contact faults. For example, if a normally open contact becomes welded closed, the mechanically linked normally closed contact cannot return to its normal closed position. A suitable monitoring device can detect this condition and respond according to the safety system design.

The 3 NO + 1 NC configuration provides three normally open contacts for controlled switching functions and one normally closed contact that can be incorporated into a feedback or monitoring circuit. This makes the relay useful in applications requiring multiple controlled outputs alongside contact status monitoring.

The Finder 7S.14.9.048.4310 uses Type A forcibly guided contact technology in accordance with EN 61810-3. This supports its use as a component in safety-related control systems designed and validated according to applicable machinery and functional safety standards.

Important: A forcibly guided relay is not a complete safety controller. The relay must be integrated into a suitable circuit architecture with the necessary monitoring, diagnostics and protective measures to achieve the required safety performance.

48 V DC Coil Operation for Industrial Automation

The Finder 7S.14.9.048.4310 operates from a 48 V DC nominal coil supply, making it suitable for industrial control systems that use this voltage for relay operation and switching interfaces.

The documented coil operating range is 38.4 to 57.6 V DC, corresponding to 80% to 120% of the nominal supply voltage. At nominal voltage, the coil draws approximately 13.5 mA, with a rated power consumption of approximately 0.7 W.

These electrical characteristics allow the relay to be incorporated into appropriately rated industrial control circuits. The coil supply should remain within the manufacturer's specified limits, and the installation must account for supply tolerances, wiring conditions and any external switching devices.

Four-Contact Switching with 3 NO + 1 NC Configuration

The Finder 7S.14.9.048.4310 provides four mechanically linked relay contacts arranged as three normally open contacts and one normally closed contact.

The three normally open contacts can be used for appropriately rated switching functions, while the normally closed contact can provide feedback to a suitable safety monitoring circuit. The actual use of each contact must be determined by the system design and the required safety function.

Each contact has a rated current of 6 A, with a maximum combined current through the normally open contacts of 12 A, subject to the manufacturer's specified conditions.

The module also has a 250 V AC rated switching voltage and a specified resistive switching capacity of 1,500 VA. The permissible current may be lower for inductive loads, frequent switching or other demanding applications, so the relevant utilisation category and contact life characteristics should always be considered.

Compact DIN Rail Installation with Screwless Spring-Clamp Terminals

The Finder 7S.14.9.048.4310 is designed for installation on a standard 35 mm DIN rail in accordance with EN 60715. Its 22.5 mm nominal housing width makes it suitable for industrial control panels where multiple switching and monitoring devices must be installed within limited space.

The relay uses screwless spring-clamp terminals, allowing conductors to be connected without conventional screw terminals. When installed using the manufacturer's specified conductor types and preparation requirements, spring-clamp connections provide a convenient and secure wiring method.

An integrated LED coil status indicator provides visual confirmation when the relay coil is energised. This supports commissioning and fault diagnosis, although the LED does not independently confirm the condition of every contact or the safety state of the connected machinery.

The module has an IP20 protection rating and should be installed inside a suitable electrical enclosure. Its operating temperature range of −40 to +70 °C supports use in a wide range of industrial environments.

Functional Safety and Machinery Control Considerations

Finder Series 7S relays are designed for applications requiring forcibly guided contacts and monitored switching. These characteristics are useful in machinery safety systems, but the performance of the complete safety function depends on the circuit architecture, diagnostic coverage, component reliability and installation conditions.

The Finder Series 7S range includes devices suitable for applications up to SIL 2 according to IEC 61508, depending on the relay type and system design. Machinery safety systems may also be assessed according to EN ISO 13849-1.

When incorporating the Finder 7S.14.9.048.4310 into a safety-related control system, designers should verify the required Performance Level or Safety Integrity Level, contact loading, fault detection measures and response to component failure.

For emergency-stop circuits, machine guarding, safety interlocks and other protective functions, the relay should be used with suitable safety monitoring and control equipment where required. The complete system must be assessed and validated by a competent professional.

Typical Applications

• Industrial machinery safety-related control circuits.
• Safety relay expansion and interface applications.
• Machine guard monitoring and interlock circuits.
• Emergency-stop control systems with appropriate safety monitoring.
• Industrial automation and PLC control cabinets.
• Monitored switching circuits requiring three normally open contacts.
• Safety feedback circuits using forcibly guided contacts.
• Manufacturing and production machinery.
• Conveyor and material handling equipment.
• Packaging and processing machinery.
• Industrial plant and machine control installations.
• 48 V DC industrial control systems.
• Compact DIN rail-mounted electrical panels.
• Safety-related switching applications requiring 3 NO + 1 NC contacts.