800.238.7474 | www.macromatic.com | [email protected] 60 Function/Code Operation Timing Chart ON DELAY Delay on Operate Delay on Make Upon application of input voltage, the time delay (t) begins. At the end of the time delay (t), the output is energized. Input voltage must be removed to reset the time delay relay & de-energize the output.. INTERVAL ON Interval Upon application of input voltage, the output is ener- gized and the time delay (t) begins. At the end of the time delay (t), the output is de-energized. Input voltage must be removed to reset the time delay relay. OFF DELAY Delay on Release Delay on Break Delay on De-Energization Upon application of input voltage, the time delay relay is ready to accept a trigger. When the trigger is applied, the output is energized. Upon removal of the trigger, the time delay (t) begins. At the end of the time delay (t), the output is de-energized. Any application of the trigger during the time delay will reset the time delay (t) and the output remains energized. SINGLE SHOT One Shot Momentary Interval Upon application of input voltage, the time delay relay is ready to accept a trigger. When the trigger is applied, the output is energized and the time delay (t) begins. During the time delay (t), the trigger is ignored. At the end of the time delay (t), the output is de-energized and the time delay relay is ready to accept another trigger. Understanding the differences between all the functions available in time delay relays can sometimes be a daunting task. To be- gin with, time delay relays are simply control relays with a time delay built in. Their purpose is to control an event based on time. Typically, time delay relays are initiated or triggered by one of two methods, depending on the function: application of input voltage application of a trigger These triggers can be one of two signals: a control switch (dry contact), i.e., limit switch, push button, float switch, etc., or volt- age (commonly known as a power trigger). CAUTION: any time delay relay that is designed to be initiated with a dry contact control switch trigger could be dam- aged if voltage is applied to the trigger switch terminals. Only products that have a “power trigger” should be used with voltage as the trigger. To help understand, some definitions are important: Input Voltage - control voltage applied to the input terminals. Depending on the function, input voltage will either initiate the unit or make it ready to initiate when a trigger is applied. Trigger- on certain timing functions, a trigger is used to initiate the unit after input voltage has been applied. As noted above, this trigger can either be a control switch (dry contact switch) or a power trigger (voltage). Output (Load) - every time delay relay has an output (either mechanical relay or solid state) that will open & close to control the load. Note that the user must provide the voltage to power the load being switched by the output contacts of the time delay relay. In all wiring diagrams, the output is shown in the normal de-energized position. Below and on the following pages are both written and visual descriptions on how the common timing functions operate. A Tim- ing Chart shows the relationship between Input Voltage, Trigger (if present) and Output. If you cannot find a product to fit your requirements or have any questions, Macromatic’s Application Engineers offer technical information along with product selection and application assistance. Call us at 800-238-7474 or e-mail us [email protected]. DEFINITION OF TIMING FUNCTIONS t ime de l ay r elay s | defi n i ti on of ti ming fu nctions
