Time Delay Relays
Dedicated - Single Shot
ORS SERIES
Description
The ORS Series’ open PCB construction offers the user good
economy without sacrificing performance and reliability. The
output relay is available in isolated, 10A, DPDT or SPDT forms.
The time delay may be ordered as factory fixed, onboard knob,
or external adjustment. All connections are 0.25 in. (6.35 mm)
male quick connect terminals.
Operation (Single Shot)
Input voltage must be applied before and during timing. Upon
momentary or maintained closure of the initiate switch (leading
edge triggered), the output relay energizes for a measured
interval of time. At the end of the time 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
L1
N/L2
L1
N/L2
Features & Benefits
FEATURES
Open PCB construction
V = Voltage
S1 = Initiate Switch
Relay contacts are
isolated.
R
T
is used when
external adjustment
is ordered.
BENEFITS
Reduces cost without sacrificing performance
and reliability
Repeat accuracy + / - 2%,
Factory calibration + / - 10%
Allows control of loads for AC or DC voltages
Separate control voltage is not required
for operation
Analog circuitry
Isolated, 10A, SPDT or
DPDT output contacts
Line voltage initiation
Accessories
P1004-12, P1004-12-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
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.
SPDT
DPDT
Ordering Information
MODEL
INPUT
VOLTAGE
ADJUSTMENT
TIME DELAY
OUTPUT
FORM
ORS120A150SD
ORS230A150SD
120VAC
Fixed
Fixed
50s
50s
DPDT
DPDT
230VAC
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/ors
Rev: 1-A-062216
Time Delay Relays
Dedicated - Single Shot
ORS SERIES
Selection Guide
Specifications
Time Delay
Type
Range
Repeat Accuracy
Tolerance
(Factory Calibration)
Reset Time
Initiate Time
Time Delay vs Temp.
& Voltage
Input
Voltage
Tolerance
24VAC
120 & 230VAC
AC Line Frequency
Power Consumption
Output
Type
Form
Rating
Life
Protection
Isolation Voltage
Mechanical
Mounting
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Weight
Analog circuitry
0.05 - 300s in 5 adjustable ranges or fixed
±2% or 20ms, whichever is greater
Adjustable: guaranteed range
Fixed: ±10%
≤ 50ms
≤ 70ms
≤ ±10%
24, 120, or 230VAC
-15% - 20%
-20% - 10%
50/60 Hz
2.25W
Electromechanical relay
Isolated, SPDT or DPDT
10A resistive @ 120/240VAC & 28VDC;
1/3 hp @ 120/240VAC
Mechanical - 1x10
7
; Electrical - 1x10
6
≥1500V RMS input to output
Surface mount with four #6 (M3.5 x 0.6) screws
H
53.8 mm (2.12”);
W
93.7 mm (3.69”);
D
47.8 mm (1.88”)
0.25 in. (6.35 mm) male quick connect terminals
Function Diagram
SINGLE SHOT
(PULSE FORMER)
V = Voltage
S1 = Initiate Switch
NO = Normally
Open Contact
NC = Normally
Closed Contact
TD = Time Delay
R = Reset
-20° to 65°C / -30° to 85°C
≅
2.7 oz (77 g)
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/ors
Rev: 1-A-062216
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