Time Delay Relays

I have noticed that most time delay relays with functions such as Repeat Cycle, Delayed Interval & ON/OFF Delay have as standard the same range available for both ON & OFF times. I need a 5 second ON time and a 30 minute OFF time, but no available one range covers both times. What can I do?

Issue: What is the difference between On Delay, Off Delay, Single Shot, Interval On and all these other time delay functions?

Issue: I have been told not to use solid state input devices such as proximity or photoelectric switches with solid state time delay relays. Why not and what can I do?

Issue: When I apply 120V to the input terminals of a time delay relay, why don’t I get 120V out of the output contacts to control my load? 

Issue: What does "repeat accuracy" mean in the Application Data section of your time delay relays?Solution: Repeat accuracy is the percent variance of time within consecutive timing cycles once a time delay relay is set to the required time delay.

Issue: I am using a time delay relay with a triggered function. My trigger switch will be closed before I apply voltage to the time delay relay. Will this work? 

Depending on the function selected, not every time delay is possible with this unit.  For example, time delays of 12.55 Seconds or 145.5 Minutes are not valid settings for Single Mode functions. 

This simple solution can be done with one Interval ON (TD1) & two Single Shot (TD2 & TD3) time delay relays.

Issue: The output relay appears to be already energized on my True Off Delay timer without any input voltage applied.  It was that way when I received it or I found it in that state during installation.  What happened and how do I fix it?

Macromatic's classic TR-6 Series Time Delay Relays have undergone major enhancements with an innovative design making them ideal for a variety of applications.

Issue #1: I have the control switches from 5 separate OFF Delay time delay relays  wired in parallel so one switch operates all 5 at once.  When I replaced one unit with yours, the Macromatic product operated once and then stopped working. 

The THS-1054A series offers accurate and reliable operation as a Low Pressure Switch Bypass or “Bypass Timer”.

Issue: How do I set the THL-8 Series Time Delay Relay?

Issue: I am using a TR-61626 Programmable Time Delay Relay with a special pin configuration with the trigger switch between pins 7 and 10 that needs to be replaced but now I am told it is no longer available.  What can I do?

Pneumatic time delay relays worked great, but they were normally very large & very expensive.

I have noticed that most time delay relays with functions such as Repeat Cycle, Delayed Interval & ON/OFF Delay have as standard the same range available for both ON & OFF times.

Issue: It looks like my time delay relay has some type of special wiring configuration. Is there anyway I can order a drop-in replacement product from Macromatic? 

Issue: What happens if I put a jumper across the control switch terminals (Pins 5 & 6) on the TD-7 Digital-Set time delay relay, but I have the function set to On Delay, which doesn't need a Control Switch to initiate it? 

Issue: I am using one of your products that has the control switch trigger between Pins 5 & 6, and the unit is not operating. What could possibly be wrong?

Issue: What does "repeat accuracy" mean in the Application Data section of your time delay relays? Solution/Resolution: Repeat accuracy is the percent variance of time within consecutive timing cycles once a time delay relay is set to the required time delay.

Issue: I have applied 24VDC input voltage to one of your time delay relays, but the product still doesn’t operate. I know the voltage supply is good. What's the solution?

Issue: Is the dial setting on your time delay relays linear? Solution/Resolution: Since most time delay relays use a potentiometer to adjust the time delay, the actual dial setting is not linear. Any markings along the dial are normally for reference only. Here is how to be most accurate.

We frequently receive technical support calls from installers that can't get their plug-in product to function correctly. This is understandable because unless you work with plug-in products on a regular basis; there are several idiosyncrasies to these products that are not common knowledge. These trouble-shooting tips cover the most common issues.

Issue: On a time delay relay with a range of 0.3-30 seconds, how come I get less than a 0.3 second setting at the “MIN” setting and/or more than a 30 second delay at “MAX”? 

There may be an application requiring the setting of the time delay "remotely" or at some distance from the time delay relay itself.

Issue: I would like to get a time delay relay with a fixed time delay vs. adjustable to both make it easy to set up & to avoid anyone from later changing the setting. What options do I have with either your plug-in or encapsulated products?

Understanding the differences between all the functions available in time delay relays can sometimes be a daunting task.

The Macromatic TAA2U and TAD1U offer a wide variety of functionality and application versatility by offering START, INHIBIT and RESET inputs. This article explains the functionality of these 3 circuits.