Allen Bradley Safedge 440F 1 Auxiliary Contacts Safety Relay 24 → 230V ac/dc, Dual-Channel 2 Safety Contacts

Complete your Safedge System with the Safedge Control Unit and provide superior protection for personnel in hazardous areas. This device works as part of the touch sensing safety system, which is designed to prevent injury to personnel by detecting pressure on the safety profile that is secured to the dangerous area or object.

The controller monitors the circuit via the profile and when normal run conditions are detected it sends a signal to the machine control circuit. When the profile is pressed from any direction through 90° this causes the top conductive rubber strip to compress, which then touches the middle conductive rubber. This creates a “short circuit” which reduces the overall resistance. The controller checks for this and commences the machine shutdown. It also detects any faults in the profile or the wiring connections to the profile and will change the control unit outputs to a safe (OFF) state.

With a complete Safedge system all corner and straight connectors are "active" components, to ensure that there are no "dead" zones. This device is EC type approved when Safedge profiles are used with the Safedge Command Unit.

The 440F-C251D controller can be 45mm DIN railed mounted. It is comprised of Polycarbonate Plastic and has an operating temperature of -10 to +55 °C (-14…+131 °F). It has an impulse withstand voltage of 2500V. The enclosure is environmentally protected to IP40 and the terminals have IP20 protection. This unit provides an output of two fully cross monitored relays with complete redundancy.

Dimensions: H73mm, W45.5mm, D120mm

• One Safedge Evaluator unit monitors up to 50m Safedge profile - profiles may be cut to size and fit
• Two safety relay outputs, changeover auxiliary relay
• Auto/manual reset
• Indicators for RUN, STOP and FAULT conditions
• Provides contactor monitoring
• Selectable input voltage
• Control circuit voltage - all relay outputs are volt free

EN 13849 PLd, Cat. 3, EN ISO 13856-2: 2013

The Safedge system by Rockwell Automation is a safety system which uses touch sensing devices to prevent injury to personnel. It is ideal for applications where people require regular, easy, and safe access to hazardous areas and offers hand, finger, and whole-body detection. The system works by mounting a pressure sensitive safety edge to a moving piece of machinery. Light pressure from any direction through 90° on the profile will trip the system. It is useful for applications such as power operated doors, automated vehicles, and moving machinery beds.

Safety relays are devices which are used to continuously check for errors or faults in a machine safety system, and can implement safety commands when they detect these errors to bring the risk down to an acceptable level. By doing this, they defend against hazards which could cause injury to personnel and damage to machinery. Single function relays manage one specific function, while multi-function relays can oversee different activities. Safety relays can also be connected to each other. They are often used in industrial environments such as factories, as part of a safety control circuit for dangerous machines. Typical applications include: safety mats, emergency stop push-buttons, light curtains, and magnetic switches. Rockwell Automation offer high-quality, reliable safety relays which give exceptional performance and ensure maximum protection and productivity.