Time Delay Relays
Dedicated - Interval
KRDI SERIES
Description
The KRDI Series is a compact time-delay relay measuring only
2 in. (50.8 mm) square. Its solid-state timing circuit provides
excellent repeat accuracy and stability. Encapsulation protects
against shock, vibration, and humidity. The KRDI Series is a cost
effective approach for OEM applications that require small size,
isolation, reliability, and long life.
Operation (Interval)
Upon application of input voltage, the time delay begins. The
output relay energizes during the time delay. At the end of the
time delay, the output de-energizes and remains de-energized
until input voltage is removed.
Reset: Removing input voltage resets the time delay and
the output.
Wiring Diagram
Features & Benefits
FEATURES
BENEFITS
Compact, low cost
design measuring 2 in.
(50.8mm) square
L1 N/L2
Allows flexiblility for OEM applications
V = Voltage
C = Common,Transfer Contact
NO = Normally Open
NC = Normally Closed
Repeat Accuracy + / - 0.5%,
Factory calibration + / - 5%
Microcontroller based
Isolated, 10A, SPDT
output contacts
Allows control of loads for AC or DC voltages
Protects against shock, vibration, and humidity
A knob is supplied for
Encapsulated
adjustable units, or R
T
terminals 4 & 5 for external
adjust. See external
adjustment vs time delay
chart.
Accessories
P1004-95, P1004-95-X Versa-Pot
Panel mountable, industrial potentiometer
recommended for remote time delay adjustment.
Relay contacts are isolated.
P1023-6 Mounting bracket
The 90° orientation of mounting slots makes
installation/removal of modules quick and easy.
P0700-7 Versa-Knob
Designed for 0.25 in (6.35 mm) shaft of
Versa-Pot. Semi-gloss industrial black finish.
Ordering Information
P1015-13 (AWG 10/12), P1015-64 (AWG 14/16)
Female Quick Connect
These 0.25 in. (6.35 mm) female terminals are
constructed with an insulator barrel to provide
strain relief.
MODEL
INPUT VOLTAGE ADJUSTMENT
TIME DELAY
KRDI120
KRDI121
KRDI122
KRDI2110S
KRDI2160S
KRDI220
KRDI320
KRDI420
KRDI424
12VDC
Onboard knob
Onboard knob
Onboard knob
Fixed
0.1 - 10s
1 - 100s
10 - 1000s
10s
12VDC
12VDC
P1015-18 Quick Connect to Screw Adapter
Screw adapter terminal designed for use with
all modules with 0.25 in. (6.35 mm) male quick
connect terminals.
24VAC/VDC
24VAC/VDC
24VAC/VDC
24VDC
Fixed
60s
Onboard knob
Onboard knob
Onboard knob
Onboard knob
0.1 - 10s
0.1 - 10s
0.1 - 10s
1 - 100m
120VAC
120VAC
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2018 Littelfuse Protection Relays & Controls
www.littelfuse.com/krdi
Rev: 1-A-101018