TDR1A22 - TDR Series

Series: TDR Questions? Contact Littelfuse Support
Littelfuse Recycle Time Delay Relays
The TDR Series of time-delay relays are comprised of digital circuitry and an isolated, 10A relay output. The on and off delays are selected by means of two, ten position binary switches, which allow the setting of the desired delay to be precise every time.


Operation (Recycling - ON Time First)

Upon application of input voltage, the green LED glows, the output relay is energized, the red LED glows, and the T1 ON time begins. At the end of the ON time, the output deenergizes, the red LED turns OFF and the T2, OFF time begins. At the end of the OFF time, the output relay energizes and the cycle repeats as long as input voltage is applied.
Reset: Removing input voltage resets the output and time delays, and returns the sequence to the first delay.


Operation (Recycling - OFF Time First)

Upon application of input voltage, the green LED glows, the T1 OFF time begins, the load is OFF. At the end of the OFF time, the T2 ON time begins, the load energizes, and the red LED glows. At the end of the ON time the load de-energizes and the red LED turns OFF. The cycle repeats until input voltage is removed.
Reset: Removing input voltage resets the output and the sequence to the OFF time.

Property (Mouseover for details) Value
Input Voltage (V) 12VDC
Input Tolerance (%) -15% - 20%
Input DC Ripple (%) ≤10%
Output Type Electromechanical relay
Output Form DPDT
Output Load Rating (VA) 10A resistive @ 120/240VAC and 30VDC; 1/3hp @ 230VAC
Time Delay Type Microcontroller circuitry
Time Delay Range ON time first: 1 - 1 023s in 1s increments; OFF: 1 - 1 023s in 1s increments
Recycle Time (ms) ≤500ms
Reset Time (ms) ≤150ms
Repeat Accuracy (%) ±0.1% or 20ms whichever is greater
Setting Accuracy ≤±2% or 50ms whichever is greater
Setpoint vs Ambient Temperature and Operating Voltage (%) ≤ ±2%
Indication Input Green: LED on when input voltage is applied; Relay Red: LED ON when output relay energizes
Insulation Resistance ≥100 MΩ
Isolation Voltage (V) ≥1500V RMS input to output
Polarity DC units are reverse polarity protected
Life Mechanical - 1 x 107; Electrical - 1 x 105
Power Consumption ≤2W
Termination Type Octal 8-pin plug-in
Mounting Method Plug-in socket
Operating Temperature -20° to 60°C (-4°F to 140°F)
Storage Temperature (F/C) -30° to 85°C (-22°F to 185°F)
Dimensions 3.20 x 2.39 x 1.78 in. (81.3 x 60.7 x 45.2mm)
Weight (lbs/g) ≅6.0oz (170g)
Sample capable No