Time Delay Relays

Modification to Order a Product that is Normally an 8 Pin Product with 11 Pins (-H Suffix) No Longer Available

Tuesday: December 1, 2015

Issue: In the past I have purchased a time delay relay with the H option, but it is now obsolete. What can I do? Solution/Resolution: We certainly apologize that this option is no longer available and therefore, may cause some inconvenience for you. This option was to take a time delay relay that normally came

Understanding Time Delay Relay Functions

Tuesday: December 1, 2015

Issue: What is the difference between On Delay, Off Delay, Single Shot, Interval On and all these other time delay functions? Solution/Resolution: Understanding the differences between all the functions available in time delay relays can sometimes be a daunting task. When designing circuits using time delay relays, questions such as what initiates a time delay relay,

What is a True Off Delay Timer?

Monday: November 30, 2015

Issue: What is the difference between an "Off Delay" & a "True Off Delay" time delay relay, and when is the True Off Delay function used? Solution/Resolution: Pneumatic time delay relays worked great, but they were normally very large & very expensive.  In addition, they were only available in two functions: On Delay with Normally 

Time Delay Relay Functions w/ Different ON & OFF Times

Wednesday: November 4, 2015

Issue: 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

Non-Standard Control (Trigger) Switch Pin Configurations

Sunday: November 1, 2015

Issue: I have a time delay relay with a trigger switch that is not connected to pins 5 & 6 as shown in your catalog. It looks like my product has some type of special wiring configuration. Is there anyway I can order a drop-in replacement product from Macromatic? Solution/Resolution: While the industry standard for 

Control Switch Jumpered on TD-7 Digital-Set Time Delay Relay

Thursday: October 22, 2015

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? Will the unit operate satisfactorily? Solution/Resolution: No control switch is required when the

Changes to TAA1U & TAA2U Products

Monday: October 5, 2015

Issue: I noticed there are different input voltage ratings for the TAA1U & TAA2U products. When did this happen & are there other changes? Solution/Resolution: Early in 2012, Macromatic made two changes to our TAA1U & TAA2U 1/16 DIN Analog-Set Time Delay Relays: The input voltage rating was changed to “100-240VAC & 24-240VDC” from “24-240VAC"

Troubleshooting a Unit with a Control Switch Trigger

Saturday: August 29, 2015

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? Solution/Resolution: Normally when we receive this question, the problem is traced to a blown resistor in the control switch trigger circuit. Most of the time

DC Input Voltages on Time Delay Relays

Saturday: August 29, 2015

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. Solution/Resolution: Any of our time delay relays that operate on dc are polarity dependent. This means that it is important to connect the “+” & “-” wires to 

Definition of Repeat Accuracy

Saturday: August 29, 2015

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. For example, our TR-6 Series programmable & TR-5 Series non-programmable units have a repeat

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