SR3D Safety Relay – Reliable Safety for Combustion Plants and Maritime Applications

The SR3D is a versatile safety relay with three secure relay outputs. It is specifically designed for use in combustion plants operating continuously in accordance with the EN 50156-1 standard. In addition, it is certified by Germanischer Lloyd (GL) under certification number 32915-06HH, making it suitable for maritime applications. This certification makes the SR3D an ideal choice for use in waste incineration plants on ships, where it has been successfully employed for many years.

With extensive safety functions such as emergency stop monitoring, sliding protective door monitoring, light curtain monitoring, and its role as a safe coupling relay, the SR3D ensures maximum operational safety. It meets the highest safety requirements and is certified according to a wide range of international standards, including EN 60204-1, DIN EN ISO 13849-1, EN 62061, EN 50156-1, EN 746-2, IEC 61508, and IEC 61511-1.

The compact design, with a width of just 22.5 mm, allows for space-saving installation in control cabinets. The device provides three immediate safety contacts, one signal output, and a maximum switching capacity of 8 A at 250 VAC resistive load. The start behavior can be flexibly selected as either automatic start or manual, monitored start.

The SR3D offers flexible power supply options (AC/DC 24 V, AC 115 V, or AC 230 V) and a variety of connection options, including fixed screw terminals, plug-in screw terminals, or push-in spring terminals in a TWIN design. With a safety classification of PL e, Category 4, and SILCL 3, the device achieves the highest safety categories required for safety-critical applications.

Technical Data:

Feature:

• Safety functions: Emergency stop monitoring, sliding protective door monitoring, light curtain monitoring, safe coupling relay
• Certifications: EN 60204-1, DIN EN ISO 13849-1, EN 62061, EN 50156-1, EN 746-2, IEC 61508 Parts 1-2 and 4-7, IEC 61511-1
• Approvals: CE, TÜV, GL
• Supply voltage: AC/DC 24 V / AC 115 V / AC 230 V
• Number of safety contacts: 3
• Max. switching capacity of safety contacts: 8 A / 250 VAC resistive load
• Number of signal outputs: 1
• Number of immediate safety contacts: 3
• Number of delayed safety contacts: -
• Start behavior: Automatic start or manual, monitored start
• PL, Cat., SILCL (EN ISO 13849-1; EN/IEC 62061): PL e; Cat. 4; SILCL 3
• Width: 22.5 mm

Order Information:

• Order number (fixed screw terminals): 472272 (24 V) / 472271 (115 V) / 472270 (230 V)
• Order number (plug-in screw terminals): 474272 (24 V) / 474271 (115 V) / 474270 (230 V)
• Order number (push-in spring terminals, TWIN design): 475272 (24 V) / 475271 (115 V) / 475270 (230 V)

Accessories:

• Plug-in screw terminals (set) – Order number: 472592
• Push-in spring terminals (TWIN design) – Order number: 472595
• Spacer for defined minimum distance – Order number: 472596