Why Choose the Finder 7S.16.9.110.5420T Railway Safety Relay?
The Finder 7S.16.9.110.5420T is a 110 V DC, six-pole relay module with forcibly guided contacts, designed for railway electrical equipment, industrial machinery and safety-related control applications. Part of the Finder 7S Series T-version range, it features 4 normally open (NO) and 2 normally closed (NC) contacts, providing multiple switching and feedback paths for appropriately engineered safety circuits.
The relay incorporates Class A forcibly guided contact technology in accordance with EN 61810-3. Its mechanically linked normally open and normally closed contacts support the detection of certain contact failures, including welded contacts, through correctly designed monitoring circuits. The six-contact arrangement is particularly useful where several switching functions and independent feedback connections are required within a compact control panel.
Designed for demanding railway environments, the Finder 7S.16.9.110.5420T features a 110 V DC nominal coil, an extended operating voltage range of 77–137.5 V DC, 6 A rated contacts, screwless terminals and LED coil status indication. Its 35 mm DIN rail mounting enables practical installation in railway and industrial electrical enclosures.
Key Advantages
- Railway-oriented T-version designed for demanding rolling stock and railway control applications.
- Six forcibly guided contacts support safety-related switching and fault monitoring.
- 4 NO + 2 NC contact arrangement provides four normally open switching paths and two normally closed feedback paths.
- 110 V DC nominal coil voltage for compatible railway and industrial control supplies.
- Extended operating voltage range of 77–137.5 V DC accommodates specified supply variations.
- 6 A rated contact current for compatible auxiliary and control loads.
- Class A forcibly guided contacts support fault detection in correctly engineered monitoring circuits.
- Railway fire protection material compliance with EN 45545-2:2020.
- Shock and vibration resistance designed to EN 61373, Category 1, Class B.
- Railway environmental suitability according to EN 50155, OT4/ST1 classification.
- Screwless terminal connections simplify wiring and servicing.
- LED coil status indication supports commissioning and troubleshooting.
- DIN rail-mounted construction enables integration into electrical control cabinets.
Key Features
- Finder 7S Series relay module with forcibly guided contacts.
- Type 7S.16T railway-oriented variant.
- Six-pole contact configuration: 4 NO + 2 NC.
- 110 V DC rated coil voltage.
- 0.7–1.25 × UN operating voltage range.
- 6 A rated contact current.
- Class A forcibly guided contacts according to EN 61810-3.
- Mechanically linked NO and NC contacts for suitable fault monitoring arrangements.
- Integrated LED for coil energisation indication.
- Screwless terminals for convenient panel wiring.
- 35 mm DIN rail mounting according to EN 60715.
- EN 45545-2:2020 railway material fire protection compliance.
- EN 61373 railway shock and vibration classification, Category 1, Class B.
- EN 50155 railway temperature and humidity classification, OT4/ST1.
- Suitable for integration into machinery safety-related control systems designed according to EN ISO 13849-1.
Technical Specifications
- Manufacturer: Finder
- Series: 7S Series
- Type: 7S.16T
- Manufacturer part number: 7S.16.9.110.5420T
- Product type: Railway-oriented relay module with forcibly guided contacts
- Nominal coil voltage: 110 V DC
- Operating voltage range: 77–137.5 V DC
- Operating voltage factor: 0.7–1.25 × UN
- Number of poles: 6
- Contact configuration: 4 NO + 2 NC
- Contact arrangement: 6PST, 4 Form A + 2 Form B
- Rated contact current: 6 A
- Contact guidance: Class A forcibly guided
- Contact guidance standard: EN 61810-3
- Terminal type: Screwless
- Status indication: Integrated LED coil indicator
- Mounting: 35 mm DIN rail
- DIN rail standard: EN 60715
- Railway fire protection: EN 45545-2:2020
- Railway shock and vibration: EN 61373, Category 1, Class B
- Railway temperature and humidity: EN 50155, OT4/ST1
- Machinery safety system reference: EN ISO 13849-1
Forcibly Guided Relay Technology for Railway and Industrial Safety Systems
Railway and industrial control systems often require several switching contacts together with feedback contacts that can be monitored for potential failures. The Finder 7S.16.9.110.5420T provides four normally open and two normally closed forcibly guided contacts, enabling multiple control functions and contact-state monitoring within an appropriately designed circuit. The mechanically linked contact arrangement supports the detection of certain faults when used with suitable monitoring equipment.
The railway-oriented T-version is designed for environments where equipment may be exposed to vibration, shock, temperature variation and fluctuating DC supplies. Its 110 V DC coil, extended operating voltage range and screwless DIN rail construction support installation in suitable railway and industrial control cabinets. The relay is a safety-related component rather than a complete standalone safety controller; the achieved performance level, safety category or safety integrity level depends on the overall system architecture, diagnostics and validation.
Typical Applications
- Railway rolling stock electrical control cabinets.
- Train auxiliary switching and monitoring circuits.
- Railway safety-related relay interfaces.
- Railway equipment exposed to shock and vibration.
- Industrial machinery safety-related control systems.
- Emergency stop and interlock monitoring arrangements.
- Multiple-contact switching and feedback circuits.
- Industrial automation and process control panels.
- Control systems using compatible 110 V DC supplies.
