Why Choose the Finder 7S.14.8.120.4220 Safety Relay?
The Finder 7S.14.8.120.4220 is a modular safety relay featuring forcibly guided contacts, a 120 V AC coil and four contacts arranged as 2 normally open (NO) and 2 normally closed (NC). Part of the Finder 7S Series, this industrial relay is designed for applications requiring reliable switching and mechanically linked contact operation in safety-related control circuits.
With a 6 A contact current rating and a nominal switching voltage of 250 V AC, the Finder 7S.14.8.120.4220 provides dependable control and feedback switching. Its forcibly guided contact mechanism helps support contact-state monitoring and fault detection when incorporated into an appropriately designed safety control system.
The relay combines spring-loaded push-in terminals, 35 mm DIN rail mounting and an integrated LED status indicator in a compact 22.5 mm-wide enclosure. This makes it suitable for industrial automation panels, machinery control systems, safety interface circuits and electrical installations where space-efficient relay mounting and dependable contact operation are important.
Key Advantages
- Forcibly guided contacts: Provides mechanically linked NO and NC contact operation for safety-related monitoring applications.
- Four-pole configuration: Features 2 normally open and 2 normally closed contacts.
- 120 V AC coil: Designed for control systems using a nominal 120 V AC relay supply.
- 6 A contact rating: Suitable for appropriately rated industrial control and switching circuits.
- 250 V AC nominal switching voltage: Supports common industrial control applications.
- AgSnO contact material: Silver tin oxide contacts provide suitable switching characteristics for industrial relay applications.
- Fast operation: Typical operate time of 12 ms and release time of 10 ms.
- Integrated LED indicator: Provides convenient visual indication of relay energisation.
- Push-in terminals: Simplifies wiring and reduces the need for screw-terminal maintenance.
- DIN rail mounting: Enables straightforward installation in industrial control enclosures.
- Compact 22.5 mm width: Supports efficient use of available panel space.
- Wide temperature range: Suitable for operation between −40 and +70 °C.
- Long mechanical service life: Specified mechanical durability of 10 million operations.
Key Features
- Finder 7S Series modular relay.
- Forcibly guided contact construction.
- Four contacts: 2 NO + 2 NC.
- 4PST contact arrangement.
- 120 V AC nominal coil voltage.
- 6 A rated contact current.
- 250 V AC nominal contact switching voltage.
- Silver tin oxide (AgSnO) contacts.
- Spring-loaded push-in terminals.
- Integrated LED status indication.
- 12 ms operate time.
- 10 ms release time.
- 35 mm DIN rail mounting.
- 22.5 mm housing width.
- IP20 ingress protection.
- −40 to +70 °C operating temperature range.
- 10 million mechanical operations.
- Suitable for safety-related control and monitoring circuits when used within a correctly designed system.
Technical Specifications
- Manufacturer: Finder
- Series: 7S Series
- Model: 7S.14.8.120.4220
- Manufacturer part number: 7S.14.8.120.4220
- Product type: Modular relay with forcibly guided contacts
- Product category: Safety relays
- Contact arrangement: 4PST, 2 NO + 2 NC
- Number of contacts: 4
- Normally open contacts: 2
- 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 (AgSnO)
- Nominal coil voltage: 120 V AC
- Coil current: 10.2 mA
- Coil resistance: 11.8 kΩ
- Minimum operate voltage: 93 V AC
- 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
- EAN: 8012823420455
Forcibly Guided Contact Operation for Safety-Related Control Circuits
The Finder 7S.14.8.120.4220 uses a forcibly guided contact mechanism in which the normally open and normally closed contacts are mechanically linked. This arrangement is particularly useful in safety-related control systems because it supports monitoring of contact states and the detection of certain contact faults when the relay is incorporated into a suitably designed diagnostic circuit.
When the 120 V AC coil is energised, the relay changes the state of its two normally open and two normally closed contacts. The integrated LED provides visual indication of coil energisation, while the four-pole contact arrangement allows separate switching and feedback functions within the applicable electrical ratings.
The relay's silver tin oxide contacts provide a rated switching current of 6 A at a nominal contact switching voltage of 250 V AC. Its 12 ms operate time and 10 ms release time support responsive operation in industrial control circuits.
For installation, the Finder 7S.14.8.120.4220 features a compact DIN rail-mounted housing and spring-loaded push-in terminals. These features simplify panel wiring and allow the relay to be incorporated into machinery control cabinets, automation panels and electrical distribution enclosures.
Safety consideration: Although this relay features forcibly guided contacts, it is not a complete safety controller or standalone safety monitoring system. The achievable safety performance level or category depends on the complete circuit architecture, diagnostics, component selection and validation. A suitably qualified engineer should assess the application against the relevant machinery safety standards.
Typical Applications
- Industrial machinery safety-related control circuits.
- Emergency-stop control interfaces within validated safety systems.
- Safety relay output and feedback circuits.
- Machine guarding and interlock monitoring systems.
- Industrial automation control panels.
- Safety-related contact monitoring applications.
- Electrical control cabinets requiring forcibly guided contacts.
- Manufacturing and production machinery.
- Conveyor and material-handling control systems.
- 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 industrial safety relays.
