Siemens APT Relays – What are the functions of relays?

Create Date: 2024-8-30 12:03:23|Source: APT/Siemens Shanghai Ergong

(1) Isolation between input and output circuits;

(2) signal conversion;

(3) Add output circuit;

(4) repetitive signal;

(5) Switch between different voltage or current loads;

(6) Retain the output signal;

(7) Locking circuit;

(8) Provide remote control

The relay is an automatic switching element with isolation function, which is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one of the most important control components. As a control element, in summary, the relay has the following functions:

1) Expand the scope of control. For example, when the control signal of a multi-contact relay reaches a certain value, it can be changed, interrupted, and connected to multiple circuits at the same time according to the different forms of contact groups.

2) Zoom in. For example, sensitive relays, intermediate relays, etc., can control a very large power circuit with a very small amount of control.

3) Composite signals. For example, when a plurality of control signals are input into a multi-winding relay in a specified form, a predetermined control effect is achieved after comparison and synthesis.

4) Automatic, remote control, monitoring. For example, relays on automatics, together with other electrical appliances, can form a programmed control circuit to achieve automatic operation.

Siemens APT Relays – What are the functions of relays?

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