Why Choose the Finder 7S.43.9.048.0211 Safety Relay?
The Finder 7S.43.9.048.0211 is a 48 V DC safety relay module with three forcibly guided contacts, designed for safety-related switching, contact monitoring and industrial automation systems. Part of the Finder 7S Series, this relay features 2 normally open (NO) and 1 normally closed (NC) contacts, providing two switching channels and an auxiliary feedback contact within a compact DIN rail-mounted module.
Designed around a dual-channel (1oo2) architecture, the Finder 7S.43.9.048.0211 incorporates Class A forcibly guided contacts conforming to EN 61810-3. Its mechanically linked contact arrangement supports the detection of certain contact failures when integrated into appropriately designed safety monitoring circuits. The relay provides a 6 A rated contact current and a 250 V AC nominal switching voltage, making it suitable for compatible industrial control loads.
With a 48 V DC coil, screwless spring terminals, an illuminated coil status indicator and a 22.5 mm-wide housing, this relay is designed for convenient installation on a 35 mm DIN rail. It is particularly suitable for safety-related interfaces in machinery, lifts, escalators, material handling equipment and industrial process control systems.
Key Advantages
- Three forcibly guided contacts support safety-related switching and monitored feedback.
- 2 NO + 1 NC contact configuration provides two normally open switching contacts and one normally closed auxiliary contact.
- Dual-channel 1oo2 architecture supports appropriately designed redundant safety switching arrangements.
- 48 V DC nominal coil for compatible industrial DC control supplies.
- 6 A rated contact current for suitable control and auxiliary loads.
- 250 V AC nominal switching voltage for compatible electrical control applications.
- Class A forcibly guided contacts in accordance with EN 61810-3.
- Silver tin oxide and silver nickel contact materials, with gold used in the contact system.
- Screwless spring terminals simplify wiring and servicing.
- Integrated LED indication provides visual confirmation of coil energisation.
- 22.5 mm slimline housing helps conserve control cabinet space.
- 35 mm DIN rail mounting enables straightforward panel integration.
- −40 to +70 °C operating temperature range supports demanding industrial environments.
Key Features
- Finder 7S Series safety relay module.
- Type 7S.43 with three forcibly guided contacts.
- 48 V DC coil voltage.
- 2 NO + 1 NC contact arrangement.
- Two normally open switching channels with an auxiliary normally closed feedback contact.
- Double-channel architecture (1oo2).
- Class A forcibly guided contact technology.
- 6 A rated contact current.
- 250 V AC nominal switching voltage.
- Silver tin oxide (AgSnO₂) and silver nickel (AgNi) contact materials with gold (Au).
- 40.8 V DC must-operate voltage.
- 4.8 V DC must-release voltage.
- 1.6 W nominal coil power.
- 10 ms operate time and 7 ms release time.
- Screwless spring terminal connections.
- Integrated illuminated coil indicator.
- 35 mm DIN rail mounting.
- IP20 protection rating.
Technical Specifications
- Manufacturer: Finder
- Series: 7S Series
- Type: 7S.43
- Manufacturer part number: 7S.43.9.048.0211
- Product type: Safety relay module with forcibly guided contacts
- Nominal coil voltage: 48 V DC
- Must-operate voltage: 40.8 V DC
- Must-release voltage: 4.8 V DC
- Nominal coil current: 36 mA
- Coil resistance: 1.3 kΩ
- Coil power: 1.6 W
- Number of contacts: 3
- Contact configuration: 2 NO + 1 NC
- Contact arrangement: 3PST, 2 Form A + 1 Form B
- Safety architecture: Dual-channel (1oo2)
- Contact guidance: Class A forcibly guided
- Rated contact current: 6 A
- Nominal switching voltage: 250 V AC
- Contact materials: Silver tin oxide (AgSnO₂), silver nickel (AgNi) and gold (Au)
- Operate time: 10 ms
- Release time: 7 ms
- Operating temperature: −40 to +70 °C
- Protection rating: IP20
- Terminal type: Screwless spring terminals
- Status indication: Illuminated coil indicator
- Mounting type: 35 mm DIN rail
- Housing width: 22.5 mm
- Forcibly guided contact standard: EN 61810-3
- DIN rail standard: EN 60715
- RoHS compliance: Yes
Dual-Channel Safety Switching and Forcibly Guided Contact Monitoring
Industrial safety systems often require redundant switching paths and feedback arrangements that allow a monitoring circuit to identify certain relay contact failures. The Finder 7S.43.9.048.0211 provides two normally open switching contacts and one normally closed auxiliary contact in a forcibly guided arrangement. This allows the NC contact to be incorporated into an external feedback or diagnostic circuit while the two NO contacts perform the required switching functions.
The relay is part of Finder's 7S Series safety expansion module range, which is designed for integration into functional safety applications. The use of forcibly guided contacts can support safety-related control architectures, but the relay alone does not establish a particular safety integrity level or performance level. Appropriate system design, monitoring, fault analysis and validation are required to achieve the intended safety function.
Its 48 V DC coil, 6 A contact rating, screwless connections and compact DIN rail construction make the relay a practical choice for machinery, automated handling equipment and industrial process systems requiring monitored switching.
Typical Applications
- Industrial machinery safety-related control circuits.
- Safety relay expansion and monitored switching interfaces.
- Emergency stop switching within validated safety systems.
- Machine guarding and safety interlock monitoring.
- Lifts, elevators and escalator control systems.
- Hoists, cranes and material handling equipment.
- Automated warehouses and carousel storage systems.
- Automatic car wash control equipment.
- Chemical, petrochemical and industrial process control systems.
- Electrical control cabinets using compatible 48 V DC supplies.
