The 472280SK3D safety coupling relay is a universally applicable relay with three safe relay contacts, designed to interrupt circuits in a safety-oriented manner during hazardous situations. It facilitates secure signal transmission, galvanic isolation, and power adaptation between controllers and peripherals. Additionally, the SK3D can expand the contacts of SR series base devices without requiring a feedback circuit. Specifically developed for continuous operation in furnaces according to EN 50156-1 and EN 746-2, the SK3D meets the highest safety standards and is TÜV certified.

Features:

• Safe relay contacts:
- 3 safe, redundant, diverse relay contacts
- 1 feedback circuit (monitoring contact)

• Flexible use:
- Coupling of safe signals for galvanic isolation and power adaptation
- Expansion of SR series base devices without a feedback circuit

• Efficient logic:
- Reduced wiring effort through self-monitoring internal logic

• Status display:
- LED indicates switching state

• Safety standards:
- Complies with Category 4, PL e according to EN ISO 13849-1
- SIL 3 according to IEC 61508

• Certifications:
- TÜV Rheinland certified


Functionality:

• Signal transmission:
- When the control signal is activated, the internal logic closes the safety contacts, enabling the safe operation of connected loads.
- When the control signal is disconnected, the safety contacts open, safely shutting down the loads.

• Error detection:
- Single faults do not compromise the safety function. Cyclical self-monitoring ensures that errors are detected no later than during the next on/off cycle.


Mounting and Installation:

• Protection:
- Suitable for installation in control cabinets with at least IP54 protection according to EN 60204-1

• Mounting:
- Mounts on a 35 mm DIN rail according to DIN EN 60715 TH35

• Spacing and cooling:
- Maintain a minimum spacing of 10 mm from adjacent devices for the AC 115 V / 230 V variant
- Ensure adequate heat dissipation within the control cabinet
- Optional spacer (Part No. 472596 by ZANDER AACHEN) available


Safety Instructions:

• Installation and commissioning must only be performed by qualified personnel.
• Adherence to all relevant standards and regulations is required.

Included Items:

• 472280SK3D safety coupling relay

Applications:

• Safe coupling of signals in machinery and equipment
• Expansion of SR series base devices
• Furnaces according to EN 50156-1 and EN 746-2
• Applications with the highest safety requirements (PL e, SIL 3, Category 4)