Time Delay Relays
Dedicated - Recycle
HRDR SERIES
Recycling Timer
Description
The HRDR Series combines an electromechanical relay and
microcontroller timing circuitry. It offers 12 to 230V operation in
five ranges and factory fixed, onboard or externally adjustable
time delays with a repeat accuracy of ±0.5%. The high switching
capacity of the output contacts allow for direct control of heavy
loads like compressors, pumps, motors, heaters and lighting. A
bypass/reset switch option allows operator to interrupt normal
recycling sequence and energize output relay. An excellent
choice for OEM applications.
Operation (Recycling with Reset Switch)
Upon application of input voltage, the ON time T1 begins and
output relay energizes. At the end of the ON time, the output
relay de-energizes and the OFF time T2 begins. At the end of the
OFF time, the output relay energizes and the cycle repeats as
long as input voltage is applied. Some recycling timers have the
OFF time as the first delay.
Wiring Diagram
L1
N/L2
Reset:
Removing input voltage resets output and time delays,
and returns sequence to the first delay.
NO = Normally Open
S1 = Reset Switch
C = Common, Transfer Contact
L = Load
Terminals 4 & 5 and/or 7 & 8
are only included on externally
adjustable units. Relay
contacts are non-isolated.
RT is included when external
adjustment is ordered.
Terminal 6 is included when
Bypass/Reset is selected.
Bypass/Reset Switch:
Closing the normally open bypass/reset
switch energizes the output relay and resets the time delays.
Opening the switch restarts recycling operation with the
first delay.
Features & Benefits
FEATURES
Microcontroller based
Compact, low
cost design
Isolated, 30A, SPDT,
NO output contacts
Encapsulated
Independent adjustment
of On and Off delays
Bypass/Reset
switch option
BENEFITS
Repeat Accuracy + / - 0.5%
Allows flexiblility for OEM applications
Allows direct operation of heavy loads:
compressors, pumps, blower moters, heaters.
Protects against shock, vibration, and humidity
Provides greater flexibility of timing options
Allows operator to interrupt the timing sequence
and energize the output relay
Ordering Information
MODEL
INPUT
VOLTAGE
EXTERNAL ADJUSTMENT
T1 ON TIME
OPERATING
SEQUENCE
T2 OFF TIME
BYPASS / RESET
OPTION
HRDR121A4R
HRDR321A4R
HRDR322B2R
HRDR330A0R
HRDR331A1
HRDR411SB30MR
HRDR431A1R
12VDC
24VDC
24VDC
24VDC
24VDC
120VAC
120VAC
Both time onboard adj
Both time onboard adj
Both time onboard adj
Both time external adj
Both time external adj
Both times fixed
Both times external adj
1 - 100s
1 - 100s
10 - 1000S
0.1 - 10s
1 - 100s
1s
0.1 - 100s
On time first
On time first
Off time first
On time first
On time first
Off time first
On time first
1 - 100m
1 - 100m
10 - 1000S
0.1 - 10s
1 - 100s
30m
0.1 - 100s
Yes
Yes
Yes
Yes
No
Yes
Yes
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/hrdr
Rev: 1-A-062116
Time Delay Relays
Dedicated - Recycle
HRDR SERIES
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.
P0700-7 Versa-Knob
Designed for 0.25 in (6.35 mm) shaft of
Versa-Pot. Semi-gloss industrial black finish.
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.
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.
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
100ms - 1000m in 6 adjustable ranges or fixed
Repeat Accuracy
±0.5% or 20ms, whichever is greater
Tolerance
(Factory Calibration)
±5%
Reset Time
≤ 150ms
Time Delay vs Temp.
& Voltage
≤ ±2%
Input
Voltage
12 or 24VDC; 24, 120, or 230VAC
Tolerance
12VDC & 24VDC
-15% - 20%
24 to 230VAC
-20% - 10%
AC Line Frequency
50/60 Hz
Power Consumption
AC ≤ 4VA; DC ≤ 2W
Output
Type
Electromechanical relay
Form
SPDT, non-isolated
Ratings
SPDT-NO
SPDT-NC
General Purpose 125/240VAC
30A
15A
Resistive
125/240VAC
30A
15A
28VDC
20A
10A
Motor Load
125VAC
1 hp*
1/4 hp**
240VAC
2 hp**
1 hp**
Life
Mechanical - 1 x 10
6
;
Electrical - 1 x 10
5
, *3 x 10
4
, **6,000
Protection
Surge
IEEE C62.41-1991 Level A
Circuitry
Encapsulated
Dielectric Breakdown
≥ 2000V RMS terminals to mounting surface
Insulation Resistance
≥ 100 MΩ
Polarity
DC units are reverse polarity protected
Mechanical
Mounting
Surface mount with one #10 (M5 x 0.8) screw
Dimensions
H
76.7 mm (3”);
W
51.3 mm (2”);
D
38.1 mm (1.5”)
Termination
0.25 in. (6.35 mm) male quick connect terminals
Environmental
Operating/Storage
Temperature
-40° to 60°C / -40° to 85°C
Humidity
95% relative non-condensing
Weight
≅
3.9 oz (111 g)
External Resistance vs. Time Delay
Function Diagram
RECYCLING WITH
RESET SWITCH
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/hrdr
Rev: 1-A-062116
