SR3D – Universal Safety Switching Device with 3 Secure Relay Outputs

The SR3D is a versatile safety switching device specifically designed for the secure operation of machines and systems. With its 3 secure, redundant, and diverse relay outputs, it ensures fast and reliable shutdown of moving parts in the event of danger.

The SR3D meets the requirements for the safe separation of safety circuits according to EN 60204-1 and enables the safety-related stop function up to PL e / SILCL 3 according to EN ISO 13849-1 and IEC 61508. Its high reliability and wide range of connection options make it ideal for applications in industrial automation, continuous operation of firing systems (according to EN 50156-1 and EN 746-2), and for use on ships.

Application Areas:

• Single or dual-channel emergency stop circuit
• Safety guard monitoring on machines and systems
• Continuous operation of firing systems
• Safety applications on ships (certified by Germanischer Lloyd)

Features and Functions:

• 3 secure, redundant, diverse relay outputs
• 1 auxiliary contact (signal contact) for status display
• Connection options for:
- Emergency stop buttons
- Safety switches
- Non-contact safety switches
- Safety components with OSSD outputs

• Single or dual-channel operation possible
• Feedback circuit to monitor downstream contactors or extension modules
• Cross-short and ground fault monitoring
• Cyclic monitoring of output contacts
• 2 start modes available:
- Monitored manual start
- Automatic start

• LED display for switching status

Safety Features:

• Application up to PL e, SILCL 3, Category 4
• Force-guided relays for error detection
• Cyclic self-monitoring to detect errors during the next safety function request
• Safe shutdown of the machine when the safety function is triggered

Technical Data:

• Approvals: TÜV-Rheinland, Germanischer Lloyd (Certificate TAE00003JF)
• Standards: EN 60204-1, EN 50156-1, EN 746-2, EN ISO 13849-1, IEC 61508
• Protection class: Installation in control cabinets with minimum protection class IP54
• Mounting options:
- Mounting on 35 mm DIN rail according to EN 60715 TH35

• Power supply: AC 115 V / 230 V (minimum distance of 10 mm from adjacent devices required)
• Dimensions: Complies with cabinet installation standards

Installation Notes:

• Mounting on a 35 mm DIN rail (EN 60715 TH35) in a control cabinet with protection class IP54.
• For AC 115 V / 230 V variants, a minimum distance of 10 mm to adjacent devices must be maintained.
• For defined mounting distances, it is recommended to use spacers (item no. 472596) from ZANDER AACHEN to ensure proper heat dissipation.

Scope of Delivery:

• SR3D safety switching device
• Installation instructions and safety notes

Accessories:

• ZANDER AACHEN spacer (item no. 472596) to ensure defined mounting distances

The SR3D safety switching device is a reliable and future-proof solution for industrial applications that require the highest safety standards up to PL e / SILCL 3. With certifications from Germanischer Lloyd and TÜV-Rheinland, it is ideal for use in the maritime industry and on ships, as well as in firing systems and industrial machine controls.