Allen-Bradley 440R-EM4R2 Guardmaster Monitoring Safety Relay The Allen-Bradley 440R-EM4R2 is a Guardmaster Expansion Module Safety Relay designed to enhance the output capacity of safety systems. Operating at 24V DC, this module provides four normally open (N.O.) immediate safety outputs and one normally closed (N.C.) solid-state auxiliary output, facilitating reliable and efficient safety monitoring in industrial applications. Key Features Expansion Capability: Integrates seamlessly with existing Guardmaster safety relays to expand output capacity. Output Configuration: Equipped with four N.O. immediate safety outputs and one N.C. solid-state auxiliary output for versatile control options. Single Wire Safety (SWS) Input: Utilizes a single wire safety input for simplified wiring and system flexibility. Power Supply: Operates on a 24V DC power supply, standard for industrial safety systems. Removable Terminals: Features removable screw terminals to facilitate easy installation and maintenance. Compact Design: DIN rail mountable with dimensions of 119.4 mm (height) x 22.5 mm (width) x 113.6 mm (depth), optimizing space within control panels. Safety Compliance: Meets SIL 3 (IEC 61508) and PLe (ISO 13849-1) safety standards, ensuring high-level safety performance. Technical Specifications Model: 440R-EM4R2 Type: Expansion Module Power Consumption: 3.5 W Safety Output Rating: 2A at 24V DC (0.1 Hz), DC-13 (UL: B300) Wire Size: 0.2 to 2.5 mm² Operating Voltage: 20.4 V Mechanical Life Operations: 10,000,000 cycles Vibration Resistance: 10…55 Hz, 0.35 mm Shock Resistance: 10 g, 16 ms Enclosure Protection: IP40 (NEMA 1) Applications The 440R-EM4R2 is ideal for expanding the output capabilities of safety systems in various industrial settings, including: Emergency stop monitoring Safety gate and interlock systems Presence sensing with safety light curtains Presses, conveyors, and automated machinery General machine safety in industrial automation By integrating the 440R-EM4R2 into your safety system, you can achieve enhanced control and monitoring capabilities, ensuring compliance with stringent safety standards and promoting a safer working environment.