Time Delay Relays
Dedicated - Single Shot
KRDS SERIES
Single Shot
Description
The KRDS 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 KRDS Series is a cost
effective approach for OEM applications that require small size,
isolation, reliability, and long life.
Operation (Single Shot)
Input voltage must be applied before and during timing. Upon
momentary or maintained closure of the initiate switch, the
output relay energizes for a measured interval of time. At the
end of the delay, the output de-energizes. Opening or reclosing
the initiate switch during timing has no affect on the time delay.
The output will energize if the initiate switch is closed when
input voltage is applied.
Reset: Reset occurs when the time delay is complete and the
initiate switch is opened. Loss of input voltage resets the time
delay and output.
Wiring Diagram
Features & Benefits
L1
N/L2
V = Voltage
FEATURES
BENEFITS
S1 = Initiate Switch
C = Common,Transfer Contact
NO = Normally Open
NC = Normally Closed
UTL = Untimed Load
Compact, low cost
design measuring 2 in.
(50.8mm) square
Allows flexiblility for OEM applications
Repeat Accuracy + / -0.5%,
Factory calibration + / - 5%
Microcontroller based
R
is used when external
T
Isolated, 10A, SPDT
output contacts
Allows control of loads for AC or DC voltages
To protect against shock, vibration, and humidity
adjustment is ordered.
A knob is supplied for adjustable
units.The untimed load is optional.
Relay contacts are isolated.
Encapsulated
Accessories
P1004-95, P1004-95-X Versa-Pot
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
35m
P0700-7 Versa-Knob
Designed for 0.25 in (6.35 mm) shaft of
Versa-Pot. Semi-gloss industrial black finish.
KRDS1135M
KRDS120
KRDS221
KRDS420
KRDS421
KRDS424
KRDS430
12VDC
Fixed
12VDC
Onboard
Onboard
Onboard
Onboard
Onboard
External
0.1 - 10s
1 - 100s
0.1 - 10s
1 - 100s
1 - 100m
0.1 - 10s
24VAC/DC
120VAC
120VAC
120VAC
120VAC
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.
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.
If desired part number is not listed, please call us to see if it is technically possible to build.
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/krds
Rev: 1-A-062216