Siemens 3TK2821-2CB30 Safety Relay

The safety relay, also known as safety module or emergency stop relay, with type number 3TK2821-2CB30 from Siemens is an electrical relay for monitoring and controlling safety-relevant functions in machines and systems. It has the dimensions 11 x 2 x 13 cm and weighs 0.2 kg. Safety relays are used to detect malfunctions and prevent hazardous conditions by ensuring a safe shutdown of machines or system parts when necessary. Typical applications are found in automation technology, mechanical engineering, for example, for safeguarding safety doors, light curtains, or emergency stop switches on presses and conveyor systems.