Why Choose the Finder 7S.14.9.110.4220T Safety Relay?
The Finder 7S.14.9.110.4220T is a 110 V DC relay module with forcibly guided contacts, designed for safety-related switching and monitoring applications in industrial machinery, automation systems and railway equipment. Part of the Finder 7S Series, this T-version relay combines a four-pole contact arrangement with features intended for demanding railway and industrial environments.
Featuring 2 normally open (NO) and 2 normally closed (NC) contacts, the Finder 7S.14.9.110.4220T uses Class A forcibly guided contact technology to support the detection of certain contact failures within correctly designed monitoring circuits. The mechanically linked contacts are particularly useful in safety-related control architectures where feedback is required to confirm the condition of switching elements.
The relay operates from a 110 V DC nominal control supply and provides 6 A rated contacts for compatible switching applications. Its railway-oriented T-version construction, screwless terminals, LED coil status indication and 35 mm DIN rail mounting make it suitable for integration into professional control cabinets and safety-related electrical systems.
Key Advantages
- Four forcibly guided contacts support safety-related switching and contact monitoring.
- 2 NO + 2 NC configuration provides separate switching and feedback contact paths.
- 110 V DC coil for compatible DC control systems.
- 6 A contact rating for suitable auxiliary and control loads.
- Railway-oriented T-version designed for applications with demanding environmental requirements.
- Class A forcibly guided contact construction in accordance with EN 61810-3.
- Extended DC operating voltage range supports applications subject to supply variation.
- Screwless terminals simplify installation and maintenance.
- Integrated LED indicator provides visual coil status indication.
- 35 mm DIN rail mounting enables straightforward installation inside electrical enclosures.
- Suitable for safety-related control system design when correctly integrated and validated.
Key Features
- Finder 7S Series relay module with forcibly guided contacts.
- Type 7S.14T railway-oriented variant.
- Four-pole configuration: 2 NO + 2 NC.
- 110 V DC nominal coil voltage.
- 6 A rated contact current.
- Class A forcibly guided contacts for fault-detection applications.
- Extended operating voltage range: 0.7 to 1.25 times nominal voltage.
- LED coil status indication.
- Screwless terminal connections.
- 35 mm DIN rail mounting to EN 60715.
- Railway application materials compliant with EN 45545-2:2020.
- Designed for railway shock and vibration requirements under EN 61373, Category 1, Class B.
- Designed for railway temperature and humidity requirements under EN 50155, OT4/ST1 classification.
- Suitable for safety-related system architectures assessed under EN ISO 13849-1.
Technical Specifications
- Manufacturer: Finder
- Series: 7S Series
- Model: 7S.14.9.110.4220T
- Product type: Relay module with forcibly guided contacts
- Version: Railway-oriented T variant
- Nominal coil voltage: 110 V DC
- Operating voltage range: 77–137.5 V DC
- Number of contacts: 4
- Contact configuration: 2 NO + 2 NC
- Contact arrangement: 4PST, 2 Form A + 2 Form B
- Rated contact current: 6 A
- Contact guidance: Class A forcibly guided
- Terminal type: Screwless
- Status indication: Integrated LED
- Mounting type: 35 mm DIN rail
- DIN rail standard: EN 60715
- Forcibly guided contact standard: EN 61810-3
- Railway fire protection standard: EN 45545-2:2020
- Railway shock and vibration standard: EN 61373, Category 1, Class B
- Railway environmental standard: EN 50155, OT4/ST1
- Safety-related control system reference: EN ISO 13849-1
Forcibly Guided Relay Technology for Railway and Machinery Safety
Railway and industrial safety-related control systems often require dependable switching and feedback to detect faults in electrical contacts. The Finder 7S.14.9.110.4220T uses mechanically linked normally open and normally closed contacts to support fault detection within appropriately engineered monitoring circuits. Its 2 NO + 2 NC arrangement provides flexibility for switching and feedback functions in control systems.
The T-version is particularly relevant to railway equipment, where electrical components may be exposed to vibration, shock, supply fluctuations and demanding environmental conditions. Its 110 V DC supply, extended operating range and DIN rail-mounted construction support integration into suitable railway and industrial control cabinets. The relay is a safety-related component rather than a complete standalone safety controller; the achieved safety integrity level or performance level depends on the complete system architecture, diagnostics and validation.
Typical Applications
- Railway electrical control cabinets.
- Rolling stock auxiliary control circuits.
- Railway safety-related switching and monitoring systems.
- Industrial machinery safety control circuits.
- Emergency stop and machine interlock arrangements.
- Forcibly guided contact feedback circuits.
- Industrial automation and process control equipment.
- Control systems using compatible 110 V DC supplies.
