Why Choose the Finder 7S.12.9.024.5110T Safety Relay Module?
The Finder 7S.12.9.024.5110T is a 24 V DC safety relay module with forcibly guided contacts, designed for integration into industrial machinery and safety-related electrical control systems. Part of the Finder Series 7S, this compact relay module is intended for applications requiring reliable switching, contact monitoring and fault detection within an appropriately designed safety circuit.
The module belongs to Finder's family of Class A forcibly guided contact relays. This technology mechanically links normally open and normally closed contacts, allowing a suitable monitoring circuit to detect certain contact faults, including welded contacts. It is particularly valuable in machinery control applications where feedback from switching devices forms part of the safety system.
The 7S.12 family features a 1 normally open (NO) + 1 normally closed (NC) contact arrangement, a 6 A contact rating, a 24 V DC coil and screwless spring-clamp connections. Its slim DIN rail-mounted construction makes it suitable for installation in industrial automation cabinets and machinery control panels.
Product identification note: Published technical information is available for the closely related Finder 7S.12.9.024.5110. The exact additional T suffix on 7S.12.9.024.5110T has not been independently confirmed. The specifications below describe the documented base model and Series 7S characteristics; any suffix-specific differences should be checked against the manufacturer's documentation before ordering or installation.
Key Advantages
- Forcibly guided contact technology supports contact fault detection in appropriately designed safety circuits.
- Class A contact guidance provides mechanically linked normally open and normally closed contacts.
- 24 V DC coil operation supports integration into common industrial control systems.
- 1 NO + 1 NC contact configuration provides separate switching and monitoring possibilities.
- 6 A rated contacts accommodate suitable industrial control loads.
- 250 V AC nominal switching voltage for appropriately rated circuits.
- Screwless spring-clamp terminals simplify panel wiring and maintenance.
- Gold-plated silver-nickel contacts provide dependable electrical contact performance.
- Compact DIN rail-mounted housing helps conserve valuable control cabinet space.
- Defined operate and release times support predictable relay behaviour.
- Wide industrial operating temperature range supports use in demanding environments.
- Suitable for safety-related control applications when integrated into a properly assessed and validated system.
Key Features
- Finder Series 7S relay module.
- Type 7S.12 two-contact configuration.
- Class A forcibly guided contact technology.
- 1 normally open and 1 normally closed contact.
- 24 V DC nominal coil supply.
- 6 A rated contact current.
- 250 V AC nominal switching voltage.
- Silver-nickel contacts with gold plating.
- Screwless spring-clamp electrical terminals.
- 35 mm DIN rail mounting.
- Compact 22.5 mm nominal module width.
- Approximately 7 ms operate time.
- Approximately 11 ms release time.
- IP20 protection rating.
- −40 to +70 °C operating temperature range.
- Suitable for integration with appropriately designed safety monitoring equipment.
Technical Specifications
Reference: The following electrical and mechanical characteristics are documented for the Finder 7S.12.9.024.5110 base model. Confirmation is required that they also apply unchanged to the 7S.12.9.024.5110T variant.
- Manufacturer: Finder
- Series: 7S
- Requested product code: 7S.12.9.024.5110T
- Documented reference model: 7S.12.9.024.5110
- Product category: Relay module with forcibly guided contacts
- Contact configuration: 1 NO + 1 NC
- Contact guidance: Class A forcibly guided
- Nominal coil voltage: 24 V DC
- Rated contact current: 6 A
- Nominal switching voltage: 250 V AC
- Coil power: 0.9 W
- Coil current: 38.2 mA
- Coil resistance: 628 Ω
- Must-operate voltage: 16.8 V DC
- Must-release voltage: 2.4 V DC
- Contact material: Silver-nickel (AgNi) with gold plating
- Operate time: 7 ms
- Release time: 11 ms
- Electrical terminals: Spring-clamp, screwless
- Mounting: DIN rail
- DIN rail size: 35 mm
- Nominal housing width: 22.5 mm
- Ingress protection: IP20
- Operating temperature: −40 to +70 °C
- Exact T-suffix specification: Manufacturer confirmation required
The principal benefit of the Finder Series 7S is its forcibly guided relay contact construction. In a conventional relay, normally open and normally closed contacts may not provide the same mechanically constrained fault behaviour. With forcibly guided contacts, the contact sets are linked so that they cannot simultaneously reach their closed positions under specified fault conditions.
For example, if a normally open contact becomes welded closed, the mechanically linked normally closed contact is prevented from closing normally. An appropriately designed monitoring circuit can detect this discrepancy and use it to inhibit a machine restart or initiate another defined safety response.
The 1 NO + 1 NC configuration provides a straightforward arrangement for switching and feedback functions. The normally open contact may be used as part of the controlled circuit, while the normally closed contact can provide feedback to suitable monitoring equipment, subject to the requirements of the overall safety design.
Forcibly guided contact construction does not make the relay a complete safety controller. The complete safety function must incorporate appropriate monitoring, fault detection, redundancy where necessary and system-level validation.
24 V DC Relay Operation for Industrial Control Panels
The documented Finder 7S.12.9.024.5110 base model operates with a 24 V DC nominal coil, making it suitable for integration into industrial control systems using this common control voltage.
Its 6 A rated contact current and 250 V AC nominal switching voltage support a range of appropriately rated electrical loads. The permitted switching duty depends on the type of load, operating conditions and the relevant manufacturer contact ratings.
The relay's gold-plated silver-nickel contacts combine established industrial relay contact materials with a plated surface. This construction supports dependable switching performance when used within the specified electrical limits.
Documented operating characteristics for the base model include an approximate 7 ms operate time and 11 ms release time. These values describe the relay itself and must not be confused with the overall response or stopping time of a complete machinery safety system.
Compact DIN Rail Installation and Screwless Connections
The Finder 7S.12 family is designed for installation in electrical control cabinets using a standard 35 mm DIN rail. Its compact 22.5 mm nominal width makes it a practical choice for panels containing multiple relays, safety monitoring devices and industrial automation components.
Spring-clamp terminals provide a convenient alternative to traditional screw terminals. These connections help simplify wiring and support secure conductor retention when installed using the manufacturer's approved conductor types and preparation requirements.
The documented base model has an IP20 protection rating and should be installed inside an appropriate electrical enclosure. Its operating temperature range of −40 to +70 °C supports a wide variety of industrial applications.
Before installation, verify the exact terminal arrangement, wiring diagram, coil polarity requirements and any characteristics associated with the T suffix against the product marking and Finder documentation.
Functional Safety Design Considerations
Forcibly guided relays are frequently used in machinery safety circuits because their mechanically linked contacts can support diagnostic monitoring. However, the safety performance of an installation depends on the complete circuit architecture rather than the relay alone.
When designing a safety-related control system, engineers should consider the required Performance Level or Safety Integrity Level, diagnostic coverage, common-cause failures, contact loading and the behaviour of the system when a fault occurs.
The relay should be integrated with suitable safety controllers, monitoring circuits or other protective equipment where required. Emergency-stop systems, guard interlocks and machine safety functions must be assessed and validated against the relevant application standards.
Important: The Finder 7S.12.9.024.5110T should not be treated as a standalone emergency-stop controller or as independently providing a particular SIL or Performance Level.
Typical Applications
- Industrial machinery safety-related control circuits.
- Machine guard monitoring and interlock systems.
- Emergency-stop switching circuits within validated safety architectures.
- Relay feedback and contact monitoring circuits.
- Industrial automation control cabinets.
- PLC-controlled machinery requiring monitored relay interfaces.
- Packaging and processing machinery.
- Manufacturing equipment and automated production lines.
- Material handling and conveyor control systems.
- Industrial robot control interfaces.
- Hoists, lifts and other machinery where the relevant safety requirements are satisfied.
- 24 V DC industrial control installations.
- Compact DIN rail-mounted electrical panels.
