Time Delay Relays

For specifications, features, wiring diagrams, and general information refer to reference section.

For timer cross reference to NCC of popular brands and time/voltage ranges refer to Time Delay Cross Reference sheet. For obsolete NCC timers, refer to substitution list for appropriate replacement.

To establish time range on fixed resistor timers, use the following formula:
RT= (Time required – Time minimum) / (Time maximum – Time minimum) x 1,000,000 ohms
For example on a Q1F-00060-311 timer with the range from 3 to 60 seconds, find resistor value for 30 seconds.
RT = (30s – 3s) / (60s – 3s) x 1Mohm
RT = 27s / 57s x 1Mohm
RT = .473684 x 1Mohm
RT = approx 474K ohms resistor to achieve the desired time range 


Q. For the applications that require a start switch, can I use a voltage source to trigger the timer activation?

A. No, the start switch must be a dry contact closure. If the application has voltage to trigger the timer to activate, use the universal voltage input buffer part ASY-INPUT-BUFR. 


Q. What timer logic do I require for my application? Delay on Make, Delay on Break, Interval, Single Shot, Repeat Cycle, or Flasher?

A. Refer to TMM Installation Instructions in reference section for complete detail on logic functions of timers. 


Q. The relay contacts on my time delay are not putting out any voltage.

A. The relay contacts are dry and isolated from the timer’s power source. 


If your application requires a specific function and time range not found in our standard catalog, contact NCC for your special needs. Minimum ordering quantity will apply. 

Can't find your answer here then e-mail our "Ask Our Expert" and we will get back to you shortly with the answer.