The VIPER SCR-31-i Safety Relay (Part Number: 280002) manufactured by world-leading IDEM Safety Switches Ltd (United Kingdom) is an advanced next-generation safety control device with enhanced diagnostics, designed to monitor and safely interrupt power in hazardous industrial automation processes. It conforms to the highest international machinery safety standards, including Category 4, PLe (ISO 13849-1) and SIL CL 3 (IEC 62061).

PRODUCT OVERVIEW & SPECIFICATIONS (PART NO: 280002):
- Part Number: 280002
- Model: VIPER SCR-31-i
- Terminal Connection: Fixed Screw Terminals.
- Contact Configuration: 3 Normally Open (N/O) safety switching outputs and 1 Normally Closed (N/C) auxiliary monitoring output.
- Circuit Configuration: Supports single or dual channel inputs, with user-selectable automatic reset or monitored manual reset modes.

KEY HIGHLIGHTS:
- Advanced front-panel visual LED diagnostic display allowing quick identification of input status, supply power, internal relay health, and wiring faults.
- Integrated feedback loop (EDM) for monitoring external contactors, preventing hazards associated with welded power contacts.
- Compact 22.5 mm slim housing footprint optimized for 35 mm DIN rail mounting, maximizing control panel space.
- Modular expansion capability allowing seamless pairing with IDEM SEU-i expansion modules for increased output contact capacity.

• Manufacturer: IDEM Safety Switches Ltd
• Origin: United Kingdom
• Part Number: 280002
• Product Model: VIPER SCR-31-i
• Supply Voltage: 24V AC/DC (+/- 10%, 50-60 Hz)
• Power Consumption: Approx. 2.5 W / 3 VA
• Input Channels: Single Channel or Dual Channel operation
• Output Contact Configuration:
  - Safety Contacts: 3 x N/O (Normally Open - gold plated silver alloy)
  - Auxiliary Monitoring Contact: 1 x N/C (Normally Closed)
• Switching Capacity: 250V AC / 6A (Max. 1500 VA resistive load)
• Reset / Start Modes:
  - Automatic / Manual Start
  - Monitored Manual Reset
• Output Response Time: Less than 20 ms
• External Device Monitoring (EDM): Integrated feedback loop for contactor monitoring
• Safety Ratings & Classifications:
  - ISO 13849-1: Category 4, PLe
  - IEC 62061: SIL CL 3
  - MTTFd: > 100 years
  - Diagnostic Coverage (DC): 99% (High)
• Termination: Fixed Screw Terminals (Conductor cross-section 0.2 – 2.5 mm²)
• Mounting Style: Standard 35 mm DIN Rail (EN 60715)
• Housing Dimensions: Width 22.5 mm x Height 99 mm x Depth 114 mm
• Protection Degree: IP40 (Enclosure body) / IP20 (Terminal blocks)
• Ambient Operating Temperature: -20°C to +55°C
• Typical Applications: Emergency stop buttons, mechanical gate interlocks, non-contact magnetic switches, coded RFID switches, and safety light curtains with OSSD outputs.