Why Choose the Finder 7S.14.8.120.4310 Safety Relay?
The Finder 7S.14.8.120.4310 is a modular industrial safety relay featuring forcibly guided contacts, a 120 V AC coil and four contacts arranged as 3 normally open (NO) and 1 normally closed (NC). Part of the Finder 7S Series, this relay is designed for safety-related control circuits requiring mechanically linked contacts and dependable switching performance.
With a 6 A contact current rating and a 250 V AC nominal switching voltage, the Finder 7S.14.8.120.4310 is suitable for industrial automation, machinery control and safety interface applications. Its forcibly guided contact construction supports the detection of certain contact faults when used within a correctly designed monitoring circuit.
The relay combines spring-loaded push-in terminals, an integrated LED indicator and a compact 22.5 mm-wide DIN rail-mounted housing. These features simplify electrical panel installation, provide visual indication of relay energisation and support efficient use of control cabinet space.
Key Advantages
- Forcibly guided contacts: Mechanically linked contacts support fault detection and contact-state monitoring in safety-related circuits.
- 3 NO + 1 NC configuration: Provides three normally open switching contacts and one normally closed monitoring contact.
- 120 V AC coil: Suitable for industrial control circuits using a nominal 120 V AC supply.
- 6 A contact rating: Supports switching of appropriately rated industrial control loads.
- 250 V AC nominal switching voltage: Suitable for common industrial electrical control applications.
- Silver tin oxide contacts: AgSnO contact material provides reliable switching characteristics.
- Integrated LED indicator: Enables convenient visual confirmation of coil energisation.
- Spring-loaded terminals: Screwless push-in connections simplify installation and maintenance.
- Compact housing: The 22.5 mm width supports space-efficient control panel layouts.
- DIN rail mounting: Provides straightforward installation in industrial electrical enclosures.
- Fast switching: Typical operate and release times of 12 ms and 10 ms respectively.
- Long mechanical durability: Rated for 10 million mechanical operations.
- Wide temperature range: Suitable for operation between −40 and +70 °C.
Key Features
- Finder 7S Series modular safety relay.
- Forcibly guided contact mechanism.
- Four-pole contact configuration: 3 NO + 1 NC.
- 120 V AC nominal coil voltage.
- 6 A rated contact current.
- 250 V AC nominal switching voltage.
- 1,500 VA rated switching capacity.
- Silver tin oxide (AgSnO) contact material.
- 10.2 mA nominal coil current.
- 11.8 kΩ coil resistance.
- 12 ms operate time.
- 10 ms release time.
- Integrated LED status indication.
- Spring-loaded push-in terminals.
- 35 mm DIN rail mounting.
- 22.5 mm housing width.
- IP20 ingress protection.
- −40 to +70 °C operating temperature range.
- 10 million mechanical operations.
Technical Specifications
- Manufacturer: Finder
- Series: 7S Series
- Model: 7S.14.8.120.4310
- Manufacturer part number: 7S.14.8.120.4310
- Product type: Modular relay with forcibly guided contacts
- Product category: Safety Relays
- Contact arrangement: 4PST, 3 NO + 1 NC
- Number of contacts: 4
- Normally open contacts: 3
- Normally closed contacts: 1
- Contact mechanism: Forcibly guided
- Rated contact current: 6 A
- Nominal switching voltage: 250 V AC
- Rated switching capacity: 1,500 VA
- Contact material: Silver tin oxide (AgSnO)
- Nominal coil voltage: 120 V AC
- Coil current: 10.2 mA
- Coil resistance: 11.8 kΩ
- Minimum operate voltage: 93 V AC
- Must-release voltage: 12 V AC
- Operate time: 12 ms
- Release time: 10 ms
- Terminal type: Spring-loaded push-in terminals
- Mounting method: DIN rail
- Housing width: 22.5 mm
- Housing height: 86.2 mm
- Housing depth: 100.3 mm
- Status indication: Integrated LED
- Mechanical durability: 10,000,000 operations
- Electrical durability: 100,000 operations
- Rated insulation voltage: 250 V
- Pollution degree: 2
- Operating ambient temperature: −40 to +70 °C
- Ingress protection: IP20
- Country of origin: Italy
Forcibly Guided Contact Switching for Safety-Related Control Systems
The Finder 7S.14.8.120.4310 incorporates forcibly guided contacts, a mechanical arrangement that prevents normally open and normally closed contacts from simultaneously occupying certain contradictory states. This feature supports contact monitoring and the detection of specific contact faults when the relay is integrated into an appropriately designed safety-related control circuit.
When the 120 V AC coil is energised, the relay operates its three normally open contacts and one normally closed contact. The three NO contacts can be used for appropriately rated switching functions, while the NC contact can provide feedback to a compatible monitoring circuit. The exact arrangement and achievable diagnostic coverage depend on the complete system design.
The relay features 6 A silver tin oxide contacts with a nominal switching voltage of 250 V AC. Its specified 12 ms operate time and 10 ms release time support responsive control circuit operation.
For installation, the Finder 7S.14.8.120.4310 uses spring-loaded push-in terminals and a 22.5 mm-wide DIN rail-mounted housing. The integrated LED indicator allows operators and maintenance engineers to check the relay's energisation state without additional test equipment.
Safety consideration: The Finder 7S.14.8.120.4310 is a relay with forcibly guided contacts, not a complete safety controller. The safety category, performance level or safety integrity level achieved by an installation depends on the complete circuit architecture, diagnostic measures, component selection and validation. The relay must be incorporated into a suitably engineered safety system where required.
Typical Applications
- Industrial machinery safety-related control circuits.
- Emergency-stop control interfaces within validated safety systems.
- Machine guarding and interlock monitoring circuits.
- Safety-related contact feedback applications.
- Industrial automation control panels.
- Manufacturing and production machinery.
- Conveyor and material-handling control systems.
- Electrical control cabinets requiring forcibly guided contacts.
- Industrial process control and monitoring equipment.
- OEM machinery and equipment manufacturing.
- Control circuits using 120 V AC relay supplies.
- Electrical panel-building and system integration.
- Machinery maintenance and replacement of compatible safety relays.
