SR3D Safety Relay – Universal Safety Solution for Machines and Systems

The SR3D is a universally applicable safety relay designed to meet the highest safety requirements up to PL e and SIL 3. With its three secure, redundant relay outputs, it enables the fast and safe shutdown of moving machine parts in the event of danger. The SR3D is ideal for single- or dual-channel emergency stop circuits as well as for protective barrier monitoring on machines and systems.

Additionally, the SR3D is specially designed for continuous operation in combustion plants (according to EN 50156-1 and EN 746-2) as well as for use on ships. Certified by TÜV Rheinland and Germanischer Lloyd, it can be used reliably in safety-critical environments.

Functions and Features of the SR3D:

• Two Start Modes: Monitored manual start or automatic start possible
• Safety Levels: Up to PL e and SIL 3 in accordance with EN ISO 13849-1 and IEC 61508
• Protection Functions: Cross-fault and ground-fault monitoring ensure system functionality
• Relay Outputs: 3 secure, redundant, diverse relay outputs plus 1 auxiliary contact (signaling contact)
• Reliable Monitoring: Cyclical monitoring of output contacts for early error detection
• Switch Status Indicator: LED display for status monitoring

Connection Options:

• Emergency Stop Buttons: Direct connection of emergency stop buttons possible
• Safety Switches: Monitoring of protective barriers or access doors
• Non-Contact Safety Switches: Compatible with non-contact safety switches
• Safety Components with OSSD Outputs: Connection of safety components with OSSD signals

Operating Modes and Safety Mechanisms:

• Single- or Dual-Channel Operation: Adaptable to various safety requirements
• Feedback Loop: Monitors downstream contactors or expansion modules
• Force-Guided Relays: Self-monitoring and error detection via cyclical monitoring of relay outputs

Simple Installation and Setup:

• Mounting on 35 mm DIN Rail: Compliant with EN 60715 TH35
• Installation in Control Cabinets: Designed for control cabinets with a protection class of at least IP54
• Distance Requirements: For the AC 115 V / 230 V version, a minimum distance of 10 mm from adjacent devices must be maintained. Spacers from ZANDER AACHEN (Part No. 472596) are available as accessories.
• Heat Dissipation: Sufficient heat dissipation in the control cabinet must be ensured to avoid overheating.

Certifications and Standards:

• Compliance: EN 60204-1, EN 50156-1, EN 746-2
• Certifications: TÜV Rheinland and Germanischer Lloyd

Technical Data:

• Safety Levels: Up to PL e and SIL 3
• Start Behavior: Monitored manual start or automatic start
• Relay Outputs: 3 secure, redundant, diverse relay outputs plus 1 auxiliary contact
• Connection Options: Emergency stop buttons, safety switches, non-contact safety switches, safety components with OSSD outputs
• Monitoring: Cross-fault and ground-fault monitoring, feedback loop, cyclical monitoring of output contacts
• Mounting: On 35 mm DIN rail (EN 60715 TH35)
• Protection Class: Installation in control cabinets with protection class IP54
• Distance: Minimum distance of 10 mm for AC 115 V / 230 V version
• Accessories: Spacer (ZANDER AACHEN, Part No. 472596)