Simplify installation and safety control system complexity with the 440R DI/DIS Guardmaster Safety Relays by Rockwell Automation. These units consolidate the functionality of two safety relays into a convenient single 22.5 mm housing electromechanical relay (DI) or solid state (DIS) outputs.

With the Guardmaster family of safety relays, many important components in a control system such as safety interlock switches, pressure sensitive safety mats, emergency stop devices, and OSSD devices such as safety light curtains are compatible with the same relay without added configuration, saving you time and money. These 440R DI/DIS Safety Relays help you to minimise downtime through reliable, fast fault detection which prevents risk of damage to machinery and protects personnel from injury.

These units can replace a pair of the following Guardmaster safety relays: MSR127, MSR131, MSR142, MSR144, MSR30.

• Suitable for applications up to PLe, Cat. 4 per ISO 13849-1 and SIL CL3 per IEC 62061
• Two dual channel inputs
• TÜV-approved single rotary switch sets the function of the safety relay - configures auto/manual or monitored manual reset and AND/OR logic of inputs
• Single wire safety input and output to cascade safety relays and expand with output modules while maintaining SIL 3, PLe
• “AND / OR” logic between single wire safety input and standard inputs can be configured in a variety of safety functions for zoning and muting
• Universal inputs are compatible with interlocks, light curtains, safety mats, E-stops, and SensaGuard™

The 440R-D22R2 Safety Relay has 2 Dual Channel Universal Inputs, 24V DC power supply and removable terminals. It features 1 Single Wire Safe Input and 1 Single Wire Safe Output, ensuring ease-of-installation and system flexibility. It is AND / OR Logic Rotary configured and also has configured Automatic/Manual or Manual Monitored Reset, offering optimal versatility for your application. This device has 2NO immediate safety outputs and 1NC Solid State immediate auxiliary output. For diagnostics, it has LED indicators, 1 PNP Aux, optical bus. This compact unit can be DIN rail mounted (22.5 mm) to save space and energy.

Safety relays are devices which are used to monitor 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.