Allen‑Bradley 440F‑C251D | Safety Edge Controller (Safedge)

Specifications

• Function: Monitors safety edges, safety mats, and emergency rope/pull switches
• Channels: 2 (dual‑channel, cross‑monitored)
• Safety Outputs: 2 safety relay contacts (2 NC, force‑guided)
• Auxiliary Contact: 1 change‑over (NO/NC)
• Supply Voltage: 24 V AC/DC; 110–230 V AC
• Max. Sensing Length: 50 m (164 ft) of Safedge profile
• Reset: Automatic or manual (selectable)
• Safety Rating:
  • Category 3, PL d (ISO 13849‑1)
  • EN 954‑1 Cat.3
• Indicators: RUN, STOP, FAULT LEDs
• Enclosure: DIN rail mount, 45 mm width, yellow polycarbonate
• Dimensions: 73 mm (H) × 45.5 mm (W) × 120 mm (D)
• IP Rating: IP20 (controller)
• Operating Temperature: −5 °C to +55 °C

Key Features

1. Dual‑Channel Safety: Redundant, cross‑monitored design for high safety integrity.
2. Wide Voltage Range: Works with 24 V AC/DC and 110–230 V AC supplies.
3. Flexible Reset: Choose automatic reset for normal operation or manual reset for enhanced safety.
4. Diagnostic LEDs: Clear status indication for RUN, STOP, and FAULT conditions.
5. Long Sensing Distance: Monitors up to 50 meters of safety edge profile.
6. Contactor Monitoring: Input for external contactor feedback monitoring.

Applications

• Safety edges on power‑operated doors, gates, and barriers
• Emergency stop rope/pull switch systems along conveyors or machinery
• Safety mats for robot cells, automated guided vehicles (AGVs)
• Machine tools, packaging machinery, and material handling equipment