KRPDD2121MB

**Time Delay Relays** Dedicated - Dual Function 

## ~~KR~~ PD S ~~ERI~~ ES 

## Relay Output  Timer 

## **Description** 

The KRPD Series is a factory programmed time delay relay available with 1 of 12 standard dual functions. The time delays can be factory fixed, onboard or externally adjustable or a combination of fixed and adjustable. The SPDT 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 KRPD Series is a cost effective approach for OEM applications that require small size, isolation, accuracy and long life. 

## **Features & Benefits** 

|FEATURES|BENEFITS|
|---|---|
|**Microcontroller based**|Repeat Accuracy + / - 0.5%|
|**Compact design**|Allows flexiblility for OEM applications|
|**Isolated, 10A, SPDT**<br>**output contacts**|Allows control of loads for AC or DC voltages|
|**Encapsulated**|Encapsulated to protect against shock, vibration,<br>and humidity|



## **Accessories** 

## **Wiring Diagram** 

L1 N/L2 

V = Voltage C = Common, Transfer Contact NC = Normally Closed NO = Normally Open S1 = Initiate Switch UTL = Untimed Load 

A knob is supplied for adjustable units or RT terminals for external adjust. The untimed load is optional. S1 is not used for some functions. 

## **P1004-95, P1004-95-X Versa-Pot** 

Panel mountable, industrial potentiometer recommended for remote time delay adjustment. 

## **P0700-7 Versa-Knob** 

Designed for 0.25 in (6.35 mm) shaft of Versa-Pot. Semi-gloss industrial black finish. ~~&~~ : **P1015-64** (AWG 14/16) , **Female Quick Connect** ~~—|~~ These 0.25 in. (6.35 mm) female terminals are ; 5 constructed with an insulator barrel to provide strain relief. 

**P1015-18 Quick Connect to Screw Adapter** ~~ee~~ Screw adapter terminal designed for use with all modules with 0.25 in. (6.35 mm) male quick Nal connect terminals. 

## **C103PM (AL) DIN Rail** 

35 mm aluminum DIN rail available in a 36 in. (91.4 cm) length. 

## **P1023-20 DIN Rail Adapter** 

Allows module to be mounted on a 35 mm DIN type rail with two #10 screws. 

## **Ordering Information** 

|MODEL|INPUT|ADJUSTMENT 1|TIME DELAY 1|ADJUSTMENT 2|TIME DELAY 2|FUNCTION|
|---|---|---|---|---|---|---|
|KRPD215S190SMB<br>KRPD417M113MRXD<br>KRPDA175S130SMI<br>KRPDA2129RXE<br>KRPDD2121MB|24VAC<br>120VAC<br>24 to 240VAC/DC<br>24 to 240VAC/DC<br>12 to 48VDC|Fixed<br>Fixed<br>Fixed<br>Onboard<br>Onboard|5s<br>7m<br>75s<br>0.1 - 10s<br>0.1-10s|Specifications<br>Fixed<br>90s<br>Delay-on-Make/Delay-on-Break<br>Fixed<br>13m<br>Recycling/Off Time First<br>Fixed<br>30s<br>Delay-on-Make/Interval<br>Onboard<br>10 - 1000h<br>Recycling<br>Onboard<br>0.1-10s<br>Delay-on-Make/Delay-on-Break|||



If you don’t find the part you need, call us for a custom product 800-843-8848 

© 2016 Littelfuse Protection Relays & Controls www.littelfuse.com/krpd 

Rev: 1-A-062116 

**Time Delay Relays** Dedicated - Dual Function 

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## ~~KR~~ PD S ~~ERI~~ ES 

## **Output Current/Ambient Temperature** 

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## **Function Diagrams** 

## V = Voltage 

DELAY-ON-MAKE / DELAY-ON-BREAK 

S1 = Initiate Switch NO = Normally Open Contact NC = Normally Closed Contact TD1, TD2 = Time Delay R = Reset 

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**----- Start of picture text -----**<br>
DELAY-ON-MAKE / INTERVAL<br>**----- End of picture text -----**<br>


= Undefined Time 

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RECYCLE (OFF TIME FIRST)<br>RECYCLING (ON FIRST)<br>ACCUMULATIVE<br>DELAY-ON-MAKE / INTERVAL<br>**----- End of picture text -----**<br>


## **Specifications** 

**Time Delay Type** Microcontroller circuitry **Range** 0.1s - 1000h in 9 adjustable ranges or fixed (to 999) **Repeat Accuracy** ±0.5% or 20ms, whichever is greater 

**Repeat Accuracy** ±0.5% or 20ms, whichever is greater **Tolerance (Factory Calibration)** ≤ ±2% **Reset Time** ≤ 150ms **Initiate Time** ≤ 40ms; 750 operations per minute **Time Delay vs. Temperature & Voltage** ≤ ±2% **Input Voltage** 12 to 48VDC; 24 to 240VAC/DC **Tolerance 12 to 48VDC** -15% - 20% **24 to 240VAC/DC** -20% - 10% **AC Line Frequency/DC Ripple** 50/60 Hz / ≤ 10% **Power Consumption** AC ≤ 2VA; DC ≤ 2W **Output Type** Isolated relay contacts **Form** SPDT **Rating (at 40°C)** 10A resistive @ 125VAC 5A resistive @ 230VAC & 28VDC 1/4 hp @ 125VAC **Max. Switching Voltage** 250VAC **Life (Operations)** Mechanical - 1 x 10[[7]] ; Electrical - 1 x 10[5] 

**Max. Switching Voltage** 250VAC **Life (Operations)** Mechanical - 1 x 10[[7]] ; Electrical - 1 x 10 **Protection Circuitry** Encapsulated **Isolation Voltage** ≥ 1500V RMS input to output **Insulation Resistance** ≥ 100 MΩ **Polarity** DC units are reverse polarity protected **Mechanical Mounting** Surface mount with one #10 (M5 x 0.8) screw **Dimensions H** 50.8 mm (2”); **W** 50.8 mm (2”); 

Surface mount with one #10 (M5 x 0.8) screw **H** 50.8 mm (2”); **W** 50.8 mm (2”); **D** 30.7 mm (1.21”) 0.25 in. (6.35 mm) male quick connects 

**Termination Environmental Operating/Storage Temperature** -40° to 60°C / -40° to 85°C **Humidity** 95% relative, non-condensing **Weight** ≅ 2.6 oz (74 g) 

© 2016 Littelfuse Protection Relays & Controls www.littelfuse.com/krpd 

Rev: 1-A-062116