ors series - Littelfuse
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.
Features & Benefits
Wiring Diagram
L1
N/L2
L1
N/L2
V = Voltage
S1 = Initiate Switch
Relay contacts are
isolated.
RT is used when
external adjustment
is ordered.
SPDT
FEATURES
BENEFITS
Open PCB construction
Reduces cost without sacrificing performance
and reliability
Analog circuitry
Repeat accuracy + / - 2%,
Factory calibration + / - 10%
Isolated, 10A, SPDT or
DPDT output contacts
Allows control of loads for AC or DC voltages
Line voltage initiation
Separate control voltage is not required
for operation
Accessories
P1004-12, P1004-12-X Versa-Pot
Panel mountable, industrial potentiometer
recommended for remote time delay adjustment.
DPDT
P0700-7 Versa-Knob
Designed for 0.25 in (6.35 mm) shaft of
Versa-Pot. Semi-gloss industrial black finish.
Ordering Information
MODEL
INPUT
VOLTAGE
ADJUSTMENT
TIME DELAY
OUTPUT
FORM
ORS120A150SD
120VAC
Fixed
50s
DPDT
ORS230A150SD
230VAC
Fixed
50s
DPDT
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
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.
Rev: 1-A-062216
Time Delay Relays
Dedicated - Single Shot
ORS SERIES
Selection Guide
Specifications
Function Diagram
SINGLE SHOT
(PULSE FORMER)
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/ors
V = Voltage
S1 = Initiate Switch
NO = Normally
Open Contact
NC = Normally
Closed Contact
TD = Time Delay
R = Reset
Time Delay
Type
Analog circuitry
Range
0.05 - 300s in 5 adjustable ranges or fixed
Repeat Accuracy
±2% or 20ms, whichever is greater
Tolerance
(Factory Calibration)
Adjustable: guaranteed range
Fixed: ±10%
Reset Time
≤ 50ms
Initiate Time
≤ 70ms
Time Delay vs Temp.
& Voltage
≤ ±10%
Input
Voltage
24, 120, or 230VAC
Tolerance
24VAC
-15% - 20%
120 & 230VAC
-20% - 10%
AC Line Frequency
50/60 Hz
Power Consumption
2.25W
Output
Type
Electromechanical relay
Form
Isolated, SPDT or DPDT
Rating
10A resistive @ 120/240VAC & 28VDC;
1/3 hp @ 120/240VAC
Life
Mechanical - 1x107; Electrical - 1x10 6
Protection
Isolation Voltage
≥1500V RMS input to output
Mechanical
Mounting
Surface mount with four #6 (M3.5 x 0.6) screws
DimensionsH 53.8 mm (2.12”); W 93.7 mm (3.69”);
D 47.8 mm (1.88”)
Termination
0.25 in. (6.35 mm) male quick connect terminals
Environmental
Operating/Storage
Temperature
-20° to 65°C / -30° to 85°C
Weight
≅ 2.7 oz (77 g)
Rev: 1-A-062216
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