Zander Aachen SR3D AC/DC 24V Safety switching device

SR3D Safety Relay – Reliable 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, SILCL 3, and Category 4. With its three secure, redundant, and diverse relay outputs, it ensures that moving machine parts are stopped quickly and reliably in the event of a hazard. The device is ideally suited for single- or dual-channel emergency stop circuits as well as protective barrier monitoring on machines and systems.

The SR3D is also designed for use in continuous operation in combustion plants (according to EN 50156-1 and EN 746-2) and for use on ships. With certifications from TÜV Rheinland and Germanischer Lloyd, the SR3D provides maximum reliability, even in safety-critical areas.

Functions and Features of the SR3D:

• Two Start Modes: Monitored manual start or automatic start
• Safety Levels: Up to PL e, SILCL 3, and Category 4 in accordance with EN ISO 13849-1 and IEC 61508
• Protection Functions: Cross-fault and ground-fault monitoring for maximum safety
• 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 possible
• Safety Switches: For the monitoring of protective guards or access doors
• Non-Contact Safety Switches: Compatibility with modern non-contact safety switches
• Safety Components with OSSD Outputs: Direct connection to safety components with OSSD signals

Operating Modes and Safety Mechanisms:

• Single- or Dual-Channel Operation: Flexible adjustment to various safety requirements
• Feedback Loop: Monitors downstream contactors or expansion modules to ensure functionality
• Force-Guided Relays: Self-monitoring and error detection through cyclical checking of relay outputs

Simple Installation and Setup:

• Mounting on 35 mm DIN Rail: Easy mounting on a DIN rail according to EN 60715 TH35
• Installation in Control Cabinets: Suitable 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) ensure compliance with the distance requirements.
• Heat Dissipation: Adequate heat dissipation in the control cabinet must be ensured to prevent the device from 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, SILCL 3, and Category 4
• 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)