w przeciwieństwie do przekażnika rewersyjnego (z funkcją opóżnionego załączania) czyli on time-delay relay.

Single Function Time Delay Relays, On Delay

ON DELAY: When power is APPLIED to the coil, the ON DELAY timing period begins. The contacts do not transfer at this time. At the end of the ON DELAY time period the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. The contacts stay in the transferred state until power is REMOVED from the coil. They then return to their original state and the unit is ready for a new cycle.

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Single Function Time Delay Relays, Off Delay I

OFF DELAY I: Power is applied to the coil at all times. Upon CLOSURE of the start switch (a "dry" external contact), the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. When the start switch is OPENED, the OFF DELAY timing period begins. The contacts stay in the transferred position until the OFF DELAY timing period ends. They then return to their original position and the unit is ready for a new cycle.

https://www.grainger.com/category/single-function-time-delay...

Timer Relays / Digital Counters / Digital Tachometers

Digital Timer Switches, Time Delay Relays, Miniature Timer Relays, Digital Counters-Timers-Tachometers

Koyo Timer Relays - KT Series

Fuji Timer Relays - MS Series

Fuji Miniature Timer Relays - ST7 Series

Multi-Function Digital Counter-Timer-Tachometer - CTT Series
AutomationDirect offers ON/OFF time delay relays, plug-in timers and digital timer relays from two leaders in the industry, FUJI Electric and Koyo.

https://www.automationdirect.com/adc/Overview/Catalog/Relays...