The SK3D safety coupling relay is a universally applicable device offering three safe relay contacts to safely interrupt circuits during hazardous situations. It is designed for secure signal coupling, providing galvanic isolation and power adaptation between controllers and peripherals. Specifically developed for use in furnaces according to EN 50156-1 and EN 746-2, the SK3D is TÜV-certified. It can also be used to expand contacts of SR series base devices without requiring a feedback circuit.

Features:

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

• Efficient signal processing:
- Coupling of safe signals for galvanic isolation and power adaptation
- Reduced wiring effort with self-monitoring 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 safety contacts close, enabling the safe operation of connected loads.
- When the control signal is deactivated, the safety contacts open, safely shutting down the loads.

• Error detection:
- Single faults do not compromise the safety function. Errors are detected through cyclical self-monitoring and identified during the next on/off cycle.


Mounting and Installation:

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

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

• Spacing and cooling:
- Maintain at least 10 mm distance from adjacent devices for AC 115 V / 230 V
- 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:

• SK3D safety coupling relay

Applications:

• Safe coupling of signals between controllers and peripherals
• Expansion of SR series base devices
• Furnaces in compliance with EN 50156-1 and EN 746-2
• Applications requiring the highest safety standards (PL e, SIL 3, Category 4)

Note: Errors and technical changes reserved.