Time relay in electrical control system is a very important components. Generally divided into conduction delay and the power-off time delay of two types. From the action principle on the electronic, mechanical. Electronic type is the use of charge and discharge of a capacitor coupled with the electronic element principle to achieve the delay action. Mechanical style more, use of airbags, spring bag type.
Time relay wiring method
First, control wiring: you see it as a DC relay to consider. 3, 7 to 12V control voltage; 2, 7 are used to connect the 24V control voltage. 7 of them as DC negative, when used to zero line. 2 then 220V firewire.
Second, job control: Although the control voltage is connected with the upper, but whether the controls on the panel decision, timer.
Third, function to understand: it is a switch, single pole double throw, a flexible point active arm, just like the common switch movable knife arm. 8 is 5 points, is normally closed, the relay is not moved, they two. The action, 8, 6.
Fourth: the load connection: power supply zero line or the negative electrode is connected with electric appliances Zero line or a negative pole. The live wire of the power supply or the positive electrode of 8 feet, with electrical wire end or the positive electrode 6 foot, 5 foot idle.
Working principle: fifth, 8, 5 time inactive period, connected, equivalent to our usual lamp switch off. Effective, relay, 8, 6 are connected with electrical appliances, electrical work, equivalent to our ordinary lamp switch connected to the state
Connection plug: 8 needle circular plug pin definition: connection mode 1 ( domestic routine ) needle stitch definition 1 relay B public end 1 external switch public end 2 power zero line N ( AC85-265V ) B 3 relay normally-open contacts 3 time reset terminal ( RESET ) / on effective 4 relay B normally-closed contacts 4 time allowed terminal ( GATE ) / disconnect 5 relay 6 relay A A normally closed contact normally open contacts 7 power line L ( AC85-265V ) 8 relay 8 relay A A public end public terminal 2 ( OMRON, Germany and so on foreign conventional ) common type are the 1.2 coil. 34 normally open, normally closed normally open 35, 67, 68 normally closed (energized delay time relay wiring diagram type )
1, 2 is the power, the first group of 3, 4 is 3, 5 is normally open, normally closed,,, second groups of 6, 7 is normally open, 68 closed
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