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Examples of use

You can use ETD timer relays to control numerous industrial applications that require extremely precise time sequences.You can also save time and money by making settings without software and through fast wiring.

Switch-on delay

Switch-on delay  

First switch on conveyor belt 1, then conveyor belt 2

With the switch-on delay, you can start pumps or motors one by one, for example, to reduce the starting current.

You can protect against overload when switching on conveyor belts as follows:

  • First switch on conveyor belt 1
  • Once the set time has elapsed, switch on conveyor belt 2

Switch-off delay

Switch-off delay  

First switch off conveyor belt 2, then conveyor belt 1

With the switch-off delay, you can set a coasting function for fans, for example, or protect against overload when switching off pumps and motors.

You can protect against overload when switching off conveyor belts as follows:

  • First switch off conveyor belt 2
  • Once the set time has elapsed, switch off conveyor belt 1

Pulse generator

The pulse generator function can be used to specify pulse and pause times.

Use the pulse generator function of the ETD timer relay in the following applications:

  • Signal lamps, lighthouses
  • Filter backwash
  • Flushing water pipes
  • Movement of air dampers (avoiding tight fit)
  • Pump startup (avoiding tight fit)

Flashing

Using the flashing function, set a pulse/pause ratio of 1:1.

In the following examples, use timer relays with flashing function: triggering display elements such as fault indicators, warning lights, position lights.

Pulse sequence evaluation

pulse sequence evaluation  

If no goods are on the belt during the preset time, it will be shut down

With pulse sequence evaluation, you can specify a time frame in which the control contact must be actuated – this is known as a watchdog function.

This example illustrates automatic shutdown and/or error indication for a conveyor belt. If there is no pulse within the adjustable time, the conveyor belt is shut down or a message is sent.


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Further information

Phoenix Contact UAB

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03228, Vilnius
+370 5 2106321