KRPSD10.1SF - KRPS Alternating Timer Series

Littelfuse Alterating Timers
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The KRPS Series is a factory programmed time delay relay available with 1 of 15 functions and measures only 2 inches square. The KRPS offers a wide range of fixed, onboard, or externally adjustable time delays. The output relay contacts offer a full 10A rating with complete isolation. Its microcontroller timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and humidity. The KRPS Series is a cost effective approach for OEM applications that require small size, isolation, accuracy, and long life. Special time ranges and functions are available.


Operation (Alternating)
Input voltage must be applied at all times for proper operation. The operation begins with the output relay de-energized. Closing S1 enables the next alternating operation. When S1 opens (trailing edge triggered), the time delay begins. At the end of the time delay, the output energizes and remains energized until S1 is (re-closed and) re-opened. Then the output relay de-energizes and remains until S1 opens again. Each time S1 opens the time delay occurs and the output transfers.
Reset: Removing input voltage resets the output and the time delay.

Property (Mouseover for details) Value
Input Voltage (V) 12 to 48VDC
Input Tolerance (%) -15% - 20%
Input DC Ripple (%) ≤10%
Output Type Isolated relay contacts
Output Form SPDT
Output Load Rating (VA) 10A resistive @ 125VAC; 5A resistive @ 230VAC and 28VDC; 1/4hp @ 125VAC
Time Delay Type Microcontroller circuitry
Time Delay Range 0.1s fixed
Time Delay Tolerance (%) ±2%
Reset Time (ms) ≤150ms
Initiate Time (ms) ≤40ms; 750 operations per minute
Repeat Accuracy (%) ±0.5% or 20ms whichever is greater
Setpoint vs Ambient Temperature and Operating Voltage (%) ≤ ±2%
Switching Voltage Maximum (V) 250VAC
Insulation Resistance ≥100 MΩ
Isolation Voltage (V) ≥1500V RMS input to output
Circuitry Encapsulated
Polarity DC units are reverse polarity protected
Life Mechanical - 1 x 107; Electrical - 1 x 105
Power Consumption ≤ 2W
Termination Type 0.25 in. (6.35mm) male quick connect terminals
Mounting Method Surface mount with one #10 (M5 x 0.8) screw
Operating Temperature -40° to 60°C (-40°F to 140°F)
Storage Temperature (F/C) -40° to 85°C (-40°F to 185°F)
Humidity 95% relative non-condensing
Dimensions 2.00 x 2.00 x 1.21 in. (50.8 x 50.8 x 30.7mm)
Weight (lbs/g) ≅2.6oz (74g)
Sample capable No