National Controls Corporation-Time Delay Relays (Model:T1 Series)

Operating Logic: Upon application of voltage to the input terminals, the time delay cycle starts. At the end of the preset time delay, the relay coil is energized and the contacts transfer. Reset is accomplished by the removal of input voltage.

• 100% functionally tested
• Digital timing circuit
• ±1% repeatability
• Time calibrated dial
• Superior transient protection
• Fiberglass reinforced circuit board
• Internal components supported by heavy-duty chassis
• Reinforced base locator pin
• Flame-retardant polycarbonate housing

1) Remote potentiometer leads should be shielded when running close to other wires;

2) The minimum time setting on external resistor-adjustable time delay relays is obtained by shorting together the external resistor terminals of the relay;

3) The maximum time setting within tolerance limits is obtained by using a 1 megohm resistor;

4) Timing values between the minimum and maximum limits are linear with resistance within 10%;

5) Recommend 1/4 W minimum resistor be used.