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Finder 7S.16.9.048.5420 – 7S Series Relay modules with forcibly guided contacts
Finder 7S.16.9.048.5420 is a six-contact force-guided safety relay module featuring a 48 V DC coil, 4 normally open and 2 normally closed contacts, a 6 A contact rating, 250 V AC nominal switching voltage, gold-plated contact surfaces, spring-clamp terminals and DIN rail mounting for industrial safety-related control applications.
£74.63
Why Choose the Finder 7S.16.9.048.5420 Force-Guided Safety Relay?
The Finder 7S.16.9.048.5420 is a professional 48 V DC force-guided safety relay module designed for industrial automation, machinery safety and safety-related electrical control systems. Part of the Finder 7S Series, this six-contact relay features 4 normally open (NO) contacts and 2 normally closed (NC) contacts, providing a practical combination of switching outputs and feedback contacts for monitored control applications.
Featuring a 6 A rated contact current, 250 V AC nominal switching voltage and 48 V DC operating coil, the Finder 7S.16.9.048.5420 combines electromagnetic switching with mechanically guided contact technology. Its force-guided contacts are designed to maintain a defined relationship between normally open and normally closed contacts, allowing appropriately designed monitoring circuits to detect certain contact failures, including welded contacts.
The relay incorporates spring-clamp terminals, a compact 22.5 mm housing width and standard DIN rail mounting. Its IP20 protection rating makes it suitable for installation inside appropriately protected electrical control cabinets. The 4 NO + 2 NC configuration is particularly useful where several control circuits must be switched together while retaining dedicated feedback contacts for safety monitoring.
Key Advantages
- Force-guided contact technology: Mechanically linked contacts support fault detection in appropriately designed safety-related control systems.
- Six-contact configuration: Provides 4 normally open and 2 normally closed contacts within one relay module.
- 48 V DC operating coil: Suitable for compatible industrial control systems using a 48 V DC supply.
- 6 A rated contacts: Supports switching of appropriately rated industrial control loads.
- 250 V AC nominal switching voltage: Provides compatibility with suitable AC control circuits.
- Dedicated feedback contacts: Two normally closed contacts can support external monitoring and diagnostic functions.
- Mechanically guided operation: Helps identify certain contact-welding faults through correctly implemented feedback monitoring.
- Spring-clamp terminals: Enable efficient wiring without conventional screw-terminal connections.
- Compact 22.5 mm housing: Conserves valuable DIN rail space in industrial control cabinets.
- Gold-plated contact surfaces: Support dependable electrical contact performance in compatible control applications.
- DIN rail mounting: Simplifies installation alongside PLCs, safety controllers and industrial switching equipment.
- IP20 protection: Suitable for installation inside properly rated electrical enclosures.
- Industrial safety integration: Supports monitored switching arrangements used in machinery and automation systems.
- Multiple switching outputs: Allows several control functions to be operated from a common relay coil.
- Finder 7S Series engineering: Provides a specialised relay solution for professional industrial applications.
Key Features
- Finder 7S Series modular force-guided relay.
- Product family: 7S.16.
- Manufacturer part number: 7S.16.9.048.5420.
- Six-contact electromagnetic relay construction.
- 4 normally open (NO) contacts.
- 2 normally closed (NC) contacts.
- Force-guided, mechanically linked contact arrangement.
- Nominal coil voltage: 48 V DC.
- Rated contact current: 6 A.
- Nominal switching voltage: 250 V AC.
- Contact material: silver tin oxide with gold-plated contact surfaces (AgSnO₂ + Au).
- Nominal coil power consumption: 1 W.
- Typical operate time: 12 ms.
- Typical release time: 10 ms.
- Specified coil-to-contact impulse withstand voltage: 6 kV.
- Spring-clamp electrical terminals.
- Standard 35 mm DIN rail mounting.
- Compact 22.5 mm housing width.
- IP20 ingress protection.
- Suitable for monitored control and safety-related switching applications.
- Designed for integration into professionally engineered machinery control systems.
Reliable Force-Guided Switching for Industrial Safety Systems
Industrial machinery frequently requires several electrical circuits to be switched together while providing reliable feedback about the switching device's condition. In safety-related applications, faults such as welded contacts can prevent equipment from returning to its intended safe state. The Finder 7S.16.9.048.5420 is designed to support monitored switching through its force-guided contact arrangement.
The relay provides four normally open contacts for switching suitable electrical circuits and two normally closed contacts that can be incorporated into feedback monitoring arrangements. The mechanically guided construction maintains a defined relationship between the contact groups. Under the conditions specified for force-guided relay technology, an NO and an NC contact cannot be simultaneously closed, helping suitable external monitoring equipment identify certain contact failures.
The 48 V DC operating coil makes this model particularly suitable for industrial installations using a 48 V DC control supply. Its 6 A contact rating and 250 V AC nominal switching voltage support a variety of appropriately rated control loads. Designers must assess the electrical characteristics of each connected load, including inrush current and switching duty, before selecting the relay.
The relay's spring-clamp terminals provide a practical connection method for industrial control panel wiring. Its compact 22.5 mm DIN rail housing allows the device to be installed alongside safety controllers, programmable logic controllers, contactors and other automation components. The IP20 construction requires a suitable protective enclosure where environmental conditions or accessibility demand additional protection.
Although the Finder 7S.16.9.048.5420 is suitable for incorporation into safety-related control systems, it is not a complete safety controller. Any required Performance Level or Safety Integrity Level must be established through the design, calculation, monitoring and validation of the complete safety function.
Typical Applications
- Industrial machinery safety: Force-guided switching within properly engineered machine safety systems.
- Emergency-stop control circuits: Multiple switching outputs and feedback contacts in suitable monitored architectures.
- Machine guard interlocking: Relay switching and contact-state monitoring for compatible guard control systems.
- Industrial automation: Multi-contact switching in automated manufacturing equipment.
- Conveyor systems: Safety-related switching and feedback monitoring in material-handling equipment.
- Packaging machinery: Integration into monitored machine control assemblies.
- Automated warehouses: Switching and feedback functions in storage and retrieval equipment.
- Hoists and cranes: Compatible monitored control circuits in lifting applications.
- Lift and escalator controls: Force-guided switching within appropriately designed electrical control systems.
- Industrial process control: Relay switching where multiple outputs and diagnostic feedback are required.
- 48 V DC control systems: Integration into industrial installations using compatible DC control supplies.
- Safety control cabinets: Compact DIN rail-mounted relay modules for monitored switching.
- Machine refurbishment: Replacement of compatible six-contact force-guided relay modules.
- PLC-controlled equipment: Switching and feedback functions alongside suitable automation controllers.
Technical Specifications
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| Device Type | Positively Guided Relay | |
|---|---|---|
| Terminal Type | Spring clamp | |
| Mounting Type | DIN rail | |
| Switching Current (A) | 6 A | |
| Manufacturer | Finder | |
| Series | 7S Series | |
| Product family | 7S.16 | |
| Model | 7S.16.9.048.5420 | |
| Manufacturer part number | 7S.16.9.048.5420 | |
| Alternative reference | 7S1690485420 | |
| Product type | Modular force-guided safety relay | |
| Relay technology | Electromagnetic | |
| Contact arrangement | 4 NO + 2 NC | |
| Number of contacts | 6 | |
| Normally open contacts | 4 | |
| Normally closed contacts | 2 | |
| Contact technology | Force-guided, mechanically linked | |
| Contact material | AgSnO₂ + Au | |
| Rated contact current | 6 A | |
| Nominal switching voltage | 250 V AC | |
| Nominal coil voltage | 48 V DC | |
| Coil power consumption | 1 W | |
| Coil operating voltage range | 0.8 to 1.2 × nominal voltage | |
| Typical operate time | 12 ms | |
| Typical release time | 10 ms | |
| Minimum switching current | 5 mA | |
| Dielectric strength across open contacts | 1,500 V AC | |
| Coil-to-contact impulse withstand voltage | 6 kV | |
| Terminal type | Spring-clamp / screwless | |
| Mounting | 35 mm DIN rail | |
| Housing width | 22.5 mm | |
| Ingress protection | IP20 | |
| Safety-related application | Monitored industrial control circuits | |
| EAN / GTIN-13 | 8012823420899 | |
| Country of origin | Italy |
Frequently Asked Questions
What is the Finder 7S.16.9.048.5420 used for?
The Finder 7S.16.9.048.5420 is a six-contact force-guided relay module designed for industrial automation and safety-related control applications requiring mechanically linked contacts, multiple switching outputs and feedback monitoring.
What is the coil voltage of the Finder 7S.16.9.048.5420?
The relay uses a 48 V DC coil, making it suitable for compatible industrial control systems operating from a 48 V DC supply.
How many contacts does this relay have?
The Finder 7S.16.9.048.5420 has six contacts, arranged as 4 normally open (NO) and 2 normally closed (NC).
What are force-guided relay contacts?
Force-guided contacts are mechanically linked normally open and normally closed contacts designed to prevent simultaneous closure under specified fault conditions. This supports the detection of certain relay contact failures through external monitoring circuits.
What is the rated contact current?
The relay has a 6 A rated contact current. The permitted switching load depends on the operating voltage, load characteristics and manufacturer's specified electrical ratings.
What is the nominal switching voltage?
The Finder 7S.16.9.048.5420 has a 250 V AC nominal switching voltage, subject to the applicable contact current and switching duty limitations.
What contact material does the relay use?
The relay uses silver tin oxide contacts with gold-plated contact surfaces (AgSnO₂ + Au), providing suitable switching characteristics for compatible industrial control circuits.
What is the difference between the Finder 7S.16.9.048.5420 and 7S.16.9.024.5420?
Both models use a 4 NO + 2 NC force-guided contact arrangement, but the 7S.16.9.048.5420 has a 48 V DC coil, whereas the 7S.16.9.024.5420 has a 24 V DC coil. The coil voltage must match the control supply.
What is the difference between the Finder 7S.16.9.048.5420 and 7S.16.9.024.5510?
The 7S.16.9.048.5420 has a 48 V DC coil and 4 NO + 2 NC contacts, whereas the 7S.16.9.024.5510 has a 24 V DC coil and 5 NO + 1 NC contacts. Both the coil voltage and contact configuration must be considered before substitution.
What type of terminals does the relay use?
The Finder 7S.16.9.048.5420 uses spring-clamp, screwless terminals, providing convenient electrical connections in industrial control cabinets.
How is the Finder 7S.16.9.048.5420 mounted?
The relay is designed for installation on a standard 35 mm DIN rail inside a suitable electrical enclosure.
How wide is the relay?
The Finder 7S.16.9.048.5420 has a housing width of approximately 22.5 mm, allowing compact installation in industrial control panels.
What is the ingress protection rating?
The relay has an IP20 ingress protection rating and should be installed inside an appropriately rated enclosure where additional environmental or personnel protection is required.
Can the Finder 7S.16.9.048.5420 be used in emergency-stop circuits?
Yes. The relay can form part of a properly engineered emergency-stop control system where its switching characteristics, contact arrangement and feedback monitoring capabilities meet the application requirements. It does not replace a complete safety controller.
Does this relay independently provide SIL 2 or Performance Level d?
No. The Finder 7S.16.9.048.5420 is a component intended for use in suitable safety-related control architectures. The achieved SIL or Performance Level depends on the complete system design, diagnostic coverage, reliability calculations and validation.
What should be checked before installing this relay?
Check the 48 V DC coil supply, 4 NO + 2 NC contact configuration, switching current, load voltage, safety monitoring requirements, terminal wiring, environmental conditions and Finder's installation instructions.
Designed for Professional Industrial Safety and Automation
Finder 7S Series force-guided relays provide dependable switching and diagnostic feedback capabilities for industrial automation and safety-related electrical control systems. Combining a 48 V DC coil, 4 NO + 2 NC mechanically guided contacts, a 6 A contact rating, gold-plated contact surfaces, spring-clamp terminals and compact DIN rail construction, the Finder 7S.16.9.048.5420 offers a practical solution for professionally engineered machinery control and monitoring applications.
