This post explains for the Contactor.
The Part Number is 3TK2804.
The function of this semiconductor is Contactor Safety Combination.
Manufacturer: Siemens
Preview images :
Description
3TK2804 IS CONTACTOR COMBINATION FOR SAFETY CIRCUITS ENABLING AND SIGNALLING CIRCUIT. ( 4NO, 1NO+1NC DC OPERATION DC 24V )
A contactor is an electrical switching device that is used to control the flow of electricity in an electric circuit. It is an electromagnetic relay with high current capacity, typically used to switch heavy loads in industrial and commercial applications. Contactors are designed to handle large electrical currents and are commonly used to control electric motors, heating elements, lighting systems, and other high-power devices.
1. Switching High Currents: Contactors are designed to handle high electrical currents, making them suitable for controlling devices that require a lot of power, such as electric motors used in industrial machinery.
2. Electromagnetic Operation: Contactors use an electromagnetic coil to control the opening and closing of electrical contacts. When an electric current is applied to the coil, it generates a magnetic field that attracts a movable armature, closing the contacts and allowing current to flow through.
Functions and connections :
The internal control circuit of the contactor safety combination is designed according to DIN EN 60204, Part 1 (VDE 0113, Part 1), para. 9.4.2.2, so that in the case of a fault in one of the contactor relays the function of the safety circuit is maintained.
The supply voltage must meet the requirements of the DIN EN 60204 (VDE 0113, Part 1) (the terminals “L-/N; A2“ must be connected to that side of the control current circuit which is linked to the protective
conductor system).
Applications:
The contactor safety combinations can be used in EMERGENCY-OFF circuits and for monitoring protective devices (e.g. protective screens).
Other data sheets are available within the file: 3TK2804-0BB4
