Time Delay Relays Dedicated - Delay-on-Break KRDB SERIES Description The KRDB Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its microcontroller timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and humidity. The KRDB Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. Operation (Delay-on-Break) Input voltage must be applied before and during timing. Upon closure of the initiate switch, the output relay energizes. The time delay begins when the initiate switch is opened. The output remains energized during timing. At the end of the time delay, the output de-energizes. The output will energize if the initiate switch is closed when input voltage is applied. Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the time delay and output. Features & Benefits FEATURES BENEFITS Wiring Diagram Repeat accuracy + / - 0.5%, Microcontroller based L1 N/L2 Factory calibration + / - 5% V = Voltage Isolated, 10A, SPDT S1 = Initiate Switch Provides 100 million operations in typical conditions. output contacts C = Common, Transfer Contact No moving parts to arc and wear out over time and NO = Normally Open Totally solid state and encapsulated to protect against shock, vibration, NC = Normally Closed encapsulated and humidity UTL = Untimed Load (optional) Compact, low cost design measuring 2 in. Allows flexiblility for OEM applications A knob is supplied for (50.8mm) square adjustable units. The untimed load is optional. Relay contacts are isolated. Accessories P1004-95, P1004-95-X External Adjust Potentiometer Panel mountable, industrial potentiometer recommended for remote time delay adjustment. P1023-6 Mounting bracket The 90 orientation of mounting slots makes installation/removal of modules quick and easy. Ordering Information MODEL INPUT VOLTAGE ADJUSTMENT TIME DELAY MODEL INPUT VOLTAGE ADJUSTMENT TIME DELAY KRDB1110S 12VDC Fixed 10s KRDB217S 24VAC/DC Fixed 7s KRDB112.5S 12VDC Fixed 2.5s KRDB222 24VAC/ Fixed 120s KRDB1120M 12VDC Fixed 20m KRDB415S 120VAC Fixed 5s KRDB115M 12VDC Fixed 5m KRDB420 120VAC Onboard 0.1 - 10s KRDB1160M 12VDC Fixed 60m KRDB421 120VAC Onboard 1 - 100s KRDB120 12VDC Onboard 0.1 - 10s KRDB422 120VAC Onboard 10 - 1000s KRDB121 12VDC Onboard 1 - 100s KRDB424 120VAC Onboard 1 - 100m KRDB124 12VDC Onboard 1 - 100m KRDB425 120VAC Onboard 10 - 1000m KRDB125 12VDC Onboard 10 - 1000m If you dont find the part you need, call us for a custom product 800-843-8848 2016 Littelfuse Protection Relays & Controls Rev: 0-A-000016 www.littelfuse.com/krdbTime Delay Relays Dedicated - Delay-on-Break KRDB SERIES Accessories Specifications Time Delay P0700-7 Versa-Knob Type Microcontroller with watchdog circuitry Designed for 0.25 in (6.35 mm) shaft of Range 0.1s - 1000m in 6 adjustable ranges or fixed Versa-Pot. Semi-gloss industrial black finish. Repeat Accuracy 0.5% or 20ms, whichever is greater Tolerance (Factory Calibration) 5% P1015-64 (AWG 14/16), P1015-13 (AWG 10/12) Recycle Time 150ms Female Quick Connect Initiate Time 40ms These 0.25 in. (6.35 mm) female terminals are Time Delay vs Temp. constructed with an insulator barrel to provide & Voltage 5% strain relief. Input P1015-18 Quick Connect to Screw Adapter Voltage 12, 24, 110VDC 24, 120 or 230VAC Screw adapter terminal designed for use with Tolerance all modules with 0.25 in. (6.35 mm) male quick 12VDC & 24VDC/AC -15% - 20% connect terminals. 110VDC, 120 or 230VAC -20% - 10% C103PM (AL) DIN Rail AC Line Frequency/DC Ripple 50/60 Hz / 10% 35 mm aluminum DIN rail available in a 36 in. Power Consumption AC 2VA DC 2W (91.4 cm) length. Output Type Isolated relay contacts P1023-20 DIN Rail Adapter Form SPDT Allows module to be mounted on a 35 mm DIN Rating (at 40C) 10A resistive 125VAC type rail with one 10 screws. 5A resistive 230VAC & 28VDC 1/4 hp 125VAC Max. Switching Voltage 250VAC Life (Operations) Mechanical - 1 x 107 Electrical - 1 x 105 External Resistance vs. Time Delay Protection Circuitry Encapsulated Isolation Voltage 1500V RMS input to output Insulation Resistance 100 M Polarity DC units are reverse polarity protected Mechanical Mounting Surface mount with one 10 (M5 x 0.8) screw Dimensions H 50.8 mm (2.0) W 50.8 mm (2.0) D 30.7 mm (1.21) Termination 0.25 in. (6.35 mm) male quick connect terminals Environmental Operating/Storage Temperature -40 to 60C / -40 to 85C Humidity 95% relative, non-condensing Weight 2.6 oz (74 g) This chart applies to externally adjustable part numbers. The time delay is adjustable over the time delay range selected by varying the resistance across the R terminals as the resistance increases the tie T Function Diagram delay increases. When selecting an external R , add the tolerances of the timer and the R T T for the full time range adjustment. DELAY-ON-BREAK (OFF-DELAY) V = Voltage Examples: 1 to 50 S adjustable time delay, select time delay range 1 and S1 = Initiate Switch a 50 K ohn R . For 1 to 100 S use a 100 K ohm R . T T NO = Normally Open Contact NC = Normally Output Current/Ambient Temperature Closed Contact TD = Time Delay t = Incomplete Time Delay R = Reset = Undened Time 2016 Littelfuse Protection Relays & Controls Rev: 0-A-000016 www.littelfuse.com/krdb