Series Input Adjustment Time T olerance Time Delay * Operating
Sequence
HRD3 X X X X X
–1 - 12 V DC –1 -–A - +/-1% –0 - 0.1 ... 10 s
–2 - 24 V AC –2 -Blank - +/-5% –1 - 1 ... 100 s –A - ON
–3 - 24 V DC –2 - 10 ... 1000 s Time First
–4 - 120 V AC –3 -–3 - 0.1 ... 10 m –B - OFF
–6 - 230 V AC –4 - 1 ... 100 m Time First
Fixed
Onboard
Knob
External
Adjust
Low Voltage Products & Systems5.170
Accessories
Description
The HRD3 Series combines an electromechanical relay output with microcontroller timing circuitry. It offers 12
to 230 V operation in five ranges and factory fixed, external, or onboard adjustable time delays with a repeat
accuracy of +/-0.5%. The output contact rating allows for direct operation of heavy loads such as compressors,
pumps, blower motors, heaters, etc. This series is ideal for OEM applications where cost is a factor.
Operation (ON Time First)
Upon application of input voltage, the output relay
energizes and the T1 ON time begins. At the end of
the ON time, the output de-energizes and the T2 OFF
time begins. At the end of the OFF time, the output
relay energizes and the cycle repeats as long as input
voltage is applied.
Reset: Removing input voltage resets the output and
time delays, and returns the sequence to the first
delay.
See accessory pages for
specifications.
HRD3Gen 10.03.05
Equal ON and OFF Delays
30 A SPDT N.O. Output
Contacts
12 ... 230 V Operation in
5 Ranges
Encapsulated Circuitry
Delays from 100 ms ...100 m
in 5 Ranges
+/-0.5% Repeat Accuracy
Fixed, External, or Onboard
Adjustment
Approvals:
Recycling (Flasher)
HRD3 Power-Time
Time Delay Relay
Connection
Example P/N:
Function
B
Mounting bracket
P/N: P1023-6
Female quick
connect P/Ns:
P1015-64
(AWG 14/16)
P1015-13
(AWG 10/12)
Quick connect to
screw adaptor
P/N: P1015-18
External adjust
potentiometer
P/Ns:
P1004-95 (fig A)
P1004-95-X (fig B)
Versa-knob
P/N: P0700-7
→
DIN rail adaptor
P/N: P1023-20
←
A
DIN rail P/Ns:
017322005 (Steel)
NOTE: A knob, or terminals 4 & 5 are only included
on adjustable units. RT is used when external
adjustment is ordered. Relay contacts are not
isolated. Dashed lines are internal connections.
* If Fixed Delay is selected, insert
delay [0.1 … 1000] followed by (S)
sec. or [0.1 ... 100] (M) min.
HRD3421A Fixed – HRD341A0.5SB
V = Voltage R = Reset L= Load
T1 = ON Time T2 = OFF Time
T1 ≅ T2
Recycling (ON First)
C103PM (Al)
Ordering T able
C = Common, Transfer Contact
NO = Normally Open L = Load
Recycling (OFF First)
Operation (OFF Time First)
Upon application of input voltage, the T2, OFF time
begins. At the end of the OFF time, the T1, ON time
begins and the load energizes. At the end of the ON
time the load de-energizes, and the cycle repeats
until input voltage is removed.
Reset: Removing input voltage resets the output and
the sequence to the OFF time.
NO
NC
C
Technical Data
Recycling (Flasher)
HRD3 Power-Time
Time Delay Relay
Low Voltage Products & Systems 5.171
Mechanical View
HRD3Gen 10.03.05
Inches (Millimeters)
External Resistance vs Time Delay
Onboard Adjust Detail Replaces
Terminals if Ordered
Time Delay
Input
Output
Protection
Mechanical
Environmental
Type Microcontroller circuitry
Range 100 ms ... 100 m in 5 adjustable ranges or fixed
Repeat Accuracy +/-0.5 % or 20 ms, whichever is greater
Tolerance (Factory Calibration) +/-1%, +/-5%
Reset Time ≤ 150 ms
Time Delay vs. Temperature & Voltage +/-2%
Voltage 12 or 24 V DC; 24, 120, or 230 V AC
Tolerance 12 V DC & 24 V DC -15% ... +20%
24 ... 230 V AC -20% ... +10%
Line Frequency 50 ... 60 Hz
Power Consumption AC ≤ 4 VA; DC ≤ 2 W
Type Electromechanical relay
Form SPDT, non-isolated
Ratings: SPDT-N.O. SPDT-N.C.
General Purpose 125/240 V AC 30 A 15 A
Resistive 125/240 V AC 30 A 15 A
28 V DC 20 A 10 A
Motor Load 125 V AC 1 hp* 1/4 hp**
240 V AC 2 hp** 1 hp**
Life Mechanical -- 1 x 106; Electrical -- 1 x 105, *3 x 104, **6,000
Surge IEEE C62.41-1991 Level A
Circuitry Encapsulated
Dielectric Breakdown ≥ 2000 V RMS terminals to mounting surface
Insulation Resistance ≥ 100 MΩ
Polarity DC units are reverse polarity protected
Mounting Surface mount with one #10 (M5 x 0.8) screw
Package 3 x 2 x 1.5 in. (76.7 x 51.3 x 38.1 mm)
Termination 0.25 in. (6.35 mm) male quick connect terminals
Operating / Storage Temperature -40°C ... +60°C / -40°C ... +85°C
Humidity 95% relative, non-condensing
Weight ≅ 3.9 oz (111 g)
