Why Choose the Finder 7S.34.9.012.4220 Force-Guided Safety Relay?
The Finder 7S.34.9.012.4220 is a professional 12 V DC force-guided safety relay module designed for industrial automation, machinery safety and monitored electrical control applications. Part of the Finder 7S Series, this four-pole relay features 2 normally open (NO) and 2 normally closed (NC) contacts, providing mechanically linked switching and feedback contacts for use in appropriately engineered safety-related control systems.
Featuring a 6 A rated contact current, 250 V AC nominal switching voltage and 12 V DC operating coil, the Finder 7S.34.9.012.4220 combines electromagnetic relay operation with force-guided contact technology. Its mechanically linked contacts are designed to prevent normally open and normally closed contacts from being simultaneously closed under specified fault conditions, allowing suitable external monitoring circuits to detect certain relay failures, including welded contacts.
The module incorporates screw terminals, an integrated LED status indicator and standard DIN rail mounting. With a compact 22.5 mm housing width, IP20 protection and an operating temperature range of −40 to +70 °C, it is suitable for installation in industrial control cabinets, machinery safety assemblies and automation systems requiring dependable relay switching with contact-state feedback.
Key Advantages
- Force-guided contact technology: Provides mechanically linked contacts for monitored safety-related switching applications.
- 2 NO + 2 NC configuration: Combines two normally open switching contacts with two normally closed feedback contacts.
- 12 V DC operating coil: Suitable for compatible low-voltage industrial control systems.
- 6 A rated contact current: Supports switching of appropriately rated industrial control loads.
- 250 V AC nominal switching voltage: Provides compatibility with suitable AC control circuits.
- Contact-state monitoring: Supports detection of certain relay contact failures through external monitoring circuits.
- Screw terminals: Provide secure, conventional electrical connections for control panel wiring.
- Integrated LED indicator: Enables quick visual identification of relay energisation.
- Compact 22.5 mm housing: Conserves valuable DIN rail space in industrial control cabinets.
- Low coil power consumption: Nominal coil power of approximately 0.8 W.
- Fast switching response: Typical operate and release times of 12 ms and 10 ms respectively.
- Silver tin oxide contacts: Provide robust switching characteristics for compatible electrical loads.
- Wide operating temperature range: Supports operation between −40 and +70 °C.
- DIN rail mounting: Simplifies integration alongside PLCs, safety controllers and industrial switching equipment.
- Finder 7S Series construction: Designed for professional force-guided relay applications.
Key Features
- Finder 7S Series modular force-guided relay.
- Product family: 7S.34.
- Manufacturer part number: 7S.34.9.012.4220.
- Four-pole electromagnetic relay construction.
- 2 normally open (NO) contacts.
- 2 normally closed (NC) contacts.
- Force-guided, mechanically linked contact arrangement.
- Nominal coil voltage: 12 V DC.
- Rated contact current: 6 A.
- Nominal switching voltage: 250 V AC.
- Contact material: silver tin oxide (AgSnO₂).
- Nominal coil power consumption: 800 mW.
- Nominal coil current: approximately 64.7 mA.
- Coil resistance: approximately 185.5 Ω.
- Must-operate voltage: 9.6 V DC.
- Must-release voltage: 1.2 V DC.
- Typical operate time: 12 ms.
- Typical release time: 10 ms.
- Integrated illuminated operating indicator.
- Screw-terminal connections.
- Standard 35 mm DIN rail mounting.
- Compact 22.5 mm housing width.
- IP20 ingress protection.
- Operating temperature range: −40 to +70 °C.
- Cadmium-free contact material.
- Suitable for integration into monitored industrial control and machinery safety systems.
Technical Specifications
- Manufacturer: Finder
- Series: 7S Series
- Product family: 7S.34
- Model: 7S.34.9.012.4220
- Manufacturer part number: 7S.34.9.012.4220
- Alternative reference: 7S3490124220
- Product type: Modular force-guided safety relay
- Relay technology: Electromagnetic
- Contact arrangement: 2 NO + 2 NC
- Number of contacts: 4
- Normally open contacts: 2
- Normally closed contacts: 2
- Contact technology: Force-guided, mechanically linked
- Contact material: Silver tin oxide (AgSnO₂)
- Rated contact current: 6 A
- Nominal switching voltage: 250 V AC
- Nominal coil voltage: 12 V DC
- Nominal coil power: 800 mW
- Nominal coil current: 64.7 mA
- Coil resistance: 185.5 Ω
- Must-operate voltage: 9.6 V DC
- Must-release voltage: 1.2 V DC
- Typical operate time: 12 ms
- Typical release time: 10 ms
- Terminal type: Screw terminals
- Mounting: 35 mm DIN rail
- Housing width: 22.5 mm
- Ingress protection: IP20
- Operating temperature: −40 to +70 °C
- Status indication: Integrated illuminated indicator
- Contact material characteristic: Cadmium-free
- RoHS compliance: RoHS compliant
- Country of origin: Italy
- Application: Industrial automation and safety-related control systems
Reliable Force-Guided Switching for Industrial Safety Applications
Industrial machinery and automated equipment often require switching components that can operate predictably while providing reliable information about their contact states. In safety-related systems, faults such as welded relay contacts can prevent electrical circuits from returning to their intended condition. The Finder 7S.34.9.012.4220 supports monitored control applications through its force-guided contact arrangement.
The relay provides two normally open contacts for switching suitable electrical circuits and two normally closed contacts that can be incorporated into external feedback monitoring arrangements. Because the contacts are mechanically linked, the relay is designed to prevent normally open and normally closed contacts from being simultaneously closed under specified fault conditions. This characteristic allows appropriately designed monitoring equipment to detect certain contact failures.
Its 12 V DC coil is suitable for compatible low-voltage control supplies. With a nominal coil power consumption of 800 mW, the relay provides efficient electromagnetic operation. The 6 A rated contacts and 250 V AC nominal switching voltage support a variety of appropriately rated control applications, provided the connected loads comply with the manufacturer's switching limits.
The relay has a typical 12 ms operate time and 10 ms release time, supporting predictable switching behaviour. These values describe the relay's operation under specified conditions; the total response time of a safety-related control system must account for all associated controllers, monitoring devices and output equipment.
The screw-terminal construction offers a familiar wiring method for industrial panel builders and maintenance engineers. An integrated illuminated indicator provides local confirmation of relay energisation, while the compact 22.5 mm DIN rail housing allows installation alongside safety controllers, contactors, PLCs and other automation components.
Important: A force-guided relay is a component used within a safety-related control system, not a complete safety controller. The achieved Performance Level or Safety Integrity Level depends on the complete system architecture, diagnostic coverage, component reliability, fault monitoring and validation against applicable safety standards.
Typical Applications
- Industrial machinery safety: Force-guided switching within properly designed machine safety circuits.
- Emergency-stop control systems: Switching and feedback functions within suitable monitored safety architectures.
- Machine guard interlocking: Contact monitoring and output switching in compatible guard control systems.
- Industrial automation: Reliable relay operation in automated manufacturing equipment.
- 12 V DC control systems: Integration into compatible low-voltage industrial control installations.
- Conveyor systems: Safety-related switching and feedback monitoring.
- Packaging machinery: Integration into suitable machine control and safety assemblies.
- Material-handling equipment: Monitored switching in industrial transport systems.
- Automated warehouses: Safety-related relay functions in storage and retrieval equipment.
- Hoists and cranes: Compatible switching and monitoring functions in lifting equipment controls.
- Lift and escalator systems: Force-guided relay applications in appropriately engineered control systems.
- Industrial process equipment: Control circuits requiring mechanically linked relay contacts.
- Safety control cabinets: DIN rail-mounted switching and feedback modules.
- Machine refurbishment: Replacement of compatible Finder 7S.34 relay modules.
