Why Choose the Finder 7S.16.8.120.5420 Safety Relay?
The Finder 7S.16.8.120.5420 is a 6-contact modular safety relay with forcibly guided contacts, designed for industrial automation and safety-related control applications. Part of the Finder 7S Series, this relay features a 120 V AC coil, a 4 normally open (NO) + 2 normally closed (NC) contact arrangement and a 6 A rated contact current.
Its forcibly guided contact mechanism provides mechanically linked switching contacts that support contact-state monitoring and fault detection within properly designed safety circuits. The combination of four normally open contacts and two normally closed contacts makes the relay suitable for applications requiring multiple switching outputs and dedicated feedback connections.
Featuring silver tin oxide contacts with gold plating, spring-loaded screwless terminals, an integrated LED indicator and 35 mm DIN rail mounting, the Finder 7S.16.8.120.5420 offers a compact solution for industrial control cabinets, machinery safety interfaces and electrical panel-building applications.
Key Advantages
- Forcibly guided contact technology: Supports fault detection and contact-state monitoring in safety-related control circuits.
- Six-contact configuration: Provides four normally open and two normally closed contacts for switching and feedback functions.
- 120 V AC coil: Suitable for compatible industrial control systems using a 120 V AC supply.
- 6 A rated contact current: Supports appropriately rated industrial switching applications.
- 250 V AC nominal switching voltage: Suitable for common industrial control circuits.
- Gold-plated contacts: Silver tin oxide contacts with gold plating support dependable electrical contact performance.
- Integrated LED indicator: Provides convenient visual indication of relay energisation.
- Spring-loaded terminals: Screwless electrical connections simplify installation and maintenance.
- Compact construction: The 22.5 mm-wide housing helps conserve control panel space.
- DIN rail mounting: Enables straightforward installation in electrical control enclosures.
- Fast switching response: Typical operate and release times of 12 ms and 10 ms respectively.
- Long mechanical durability: Rated for 10 million mechanical operations.
- Wide operating temperature range: Suitable for environments between −40 and +70 °C.
Key Features
- Finder 7S Series modular relay.
- Forcibly guided contacts for safety-related applications.
- 6PST contact configuration: 4 NO + 2 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 contacts with gold plating.
- 10.2 mA nominal coil current.
- 11.8 kΩ coil resistance.
- 12 ms operate time.
- 10 ms release time.
- Integrated LED status indicator.
- Spring-loaded screwless 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.16.8.120.5420
- Manufacturer part number: 7S.16.8.120.5420
- Product type: Modular relay with forcibly guided contacts
- Product category: Safety Relays
- Contact configuration: 6PST, 4 NO + 2 NC
- Total number of contacts: 6
- Normally open contacts: 4
- Normally closed contacts: 2
- 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 (AgSnO₂) with gold plating
- Nominal coil voltage: 120 V AC
- Coil current: 10.2 mA
- Coil resistance: 11.8 kΩ
- Coil power: 1.1 W
- Must-operate voltage: 93 V AC
- Must-release voltage: 12 V AC
- Operate time: 12 ms
- Release time: 10 ms
- Terminal type: Spring-loaded screwless terminals
- Mounting method: DIN rail
- DIN rail size: 35 mm
- 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
Six-Contact Forcibly Guided Relay for Industrial Safety and Monitoring Circuits
The Finder 7S.16.8.120.5420 incorporates forcibly guided contacts that are mechanically linked to support monitoring of the relay's switching state. This construction is particularly valuable in safety-related control systems where feedback circuits are used to identify certain contact faults.
When the 120 V AC coil is energised, the relay changes the state of its four normally open and two normally closed contacts. The normally open contacts can be used for appropriately rated switching functions, while the normally closed contacts can provide feedback to compatible monitoring circuits.
The relay's 6 A contact rating, 250 V AC nominal switching voltage and silver tin oxide contacts with gold plating make it suitable for industrial control applications where reliable switching is essential. Its specified operate and release times support responsive control circuit operation.
For installation, the Finder 7S.16.8.120.5420 features spring-loaded screwless terminals and a compact 22.5 mm-wide DIN rail-mounted housing. The integrated LED indicator provides a visual reference for relay energisation during commissioning, inspection and maintenance.
Important safety consideration: Although the Finder 7S.16.8.120.5420 features forcibly guided contacts, it is not a complete standalone safety controller. The safety performance achieved depends on the complete circuit architecture, diagnostic coverage, component selection and validation. Safety-related applications must be designed and assessed against the relevant machinery safety requirements.
Typical Applications
- Industrial machinery safety-related control circuits.
- Emergency-stop interfaces within validated safety systems.
- Machine guarding and interlock monitoring circuits.
- Safety-related switching and feedback applications.
- Industrial automation control panels.
- Manufacturing and production machinery.
- Conveyor and material-handling control systems.
- Electrical cabinets requiring forcibly guided relay 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.
- Maintenance and replacement of compatible Finder 7S relays.
