Time Delay Relays
Dedicated - Delay-on-Make
KSD1 SERIES
Delay-on-Make Timer
Description
The KSD1 Series features two-terminal, series-connection
with the load. The KSD1 Series is an ideal choice for delay-on-
make timing applications. This series is designed for general
purpose commercial and industrial applications where a small,
cost effective, reliable solid-state timer is required. The factory
calibration for fixed time delays is within 5% of the target time
delay. The repeat accuracy, under stable conditions, is 0.5% of
the selected time delay. This series is designed for popular AC
and DC voltages. Time delays of 0.1 seconds to 1000 minutes
are available in 6 ranges. The output is rated 1A steady and 10A
inrush. The modules are totally solid state and encapsulated to
protect the electronic circuitry.
Operation (Delay-on-Make)
Upon application of input voltage, the time delay begins. The
output is de-energized before and during the time delay. At
the end of the time delay, the output energizes and remains
energized until input voltage is removed.
Reset:
Removing input voltage resets the time delay and output.
N/L2
Wiring Diagram
L1
Features & Benefits
FEATURES
Microcontroller based
Load may be
connected to
terminal 3 or 1.
R
T
is used when
external adjustment
is ordered.
BENEFITS
Repeat Accuracy + / - 0.5%,
+ / -5% time delay accuracy
Allows flexiblility for OEM applications
Provides 100 million operations in typical conditions.
No moving parts to arc and wear out over time and
encapsulated to protect against shock, vibration,
and humidity
Compact, low
cost design
1A Steady solid-state
output, 10A inrush
Totally solid state
and 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.
ADJUSTMENT
TIME DELAY
Ordering Information
MODEL
INPUT VOLTAGE
KSD11120S
KSD1123
KSD1230
KSD1320
KSD1412S
KSD14130S
KSD1420
KSD16130S
12VDC
12VDC
24VAC
24VDC
120VAC
120VAC
120VAC
230VAC
Fixed
External
Onboard
External
Fixed
Fixed
External
Fixed
20s
0.1 - 10m
0.1 - 10s
0.1 - 10s
2s
30s
0.1 - 10s
30s
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
constructed with an insulator barrel to provide
strain relief.
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/ksd1
Rev: 1-A-062116
Time Delay Relays
Dedicated - Delay-on-Make
KSD1 SERIES
Accessories
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.
Specifications
Time Delay
Range
Repeat Accuracy
Tolerance
(Factory Calibration)
Recycle Time
Time Delay vs. Temperature
& Voltage
Input
Voltage
Tolerance
AC Line Frequency
Output
Type
Form
Maximum Load Current
Minimum Holding Current
OFF State Leakage Current
Voltage Drop
Protection
Circuitry
Dielectric Breakdown
Insulation Resistance
Polarity
Mechanical
Mounting
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Humidity
Weight
0.1s - 1000m in 6 adjustable ranges or fixed
±0.5% or 20ms, whichever is greater
≤ ±5%
≤ 150ms
≤ ±10%
24, 120, or 230VAC; 12 or 24VDC
±20%
50/60 Hz
Solid state
NO, open during timing
1A steady state, 10A inrush at 60°C
≤ 40mA
≅
7mA @ 230VAC
≅
2.5V @ 1A
Encapsulated
≥ 2000V RMS terminals to mounting surface
≥ 100 MΩ
DC units are reverse polarity protected
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 connect
terminals
External Resistance vs. Time Delay
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
T
terminals; as the resistance increases the tie
delay increases.
When selecting an external R
T
, add the tolerances of the timer and the R
T
for the full time range adjustment.
Examples:
1 to 50 S adjustable time delay, select time delay range 1 and
a 50 K ohn R
T
. For 1 to 100 S use a 100 K ohm R
T
.
-40° to 60°C / -40° to 85°C
95% relative, non-condensing
≅
2.4 oz (68 g)
Function Diagram
DELAY-ON-MAKE (ON-DELAY)
V = Voltage
NO = Normally
Open Contact
NC = Normally
Closed Contact
TD = Time Delay
R = Reset
= Undefined
Time
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/ksd1
Rev: 1-A-062116
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