7S.14.8.120.4220 Finder Relay module 110/125V 3NO1 NC

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.

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.