© 2016 Littelfuse Protection Relays & Controls

Time Delay Relays

Dedicated - Delay-on-Make

www.littelfuse.com/hrdm

Rev: 1-A-062116

External Resistance vs.Time Delay

Function Diagram

DELAY-ON-MAKE (ON-DELAY)

V = Voltage

NO = Normally

Open Contact

NC = Normally

Closed Contact

TD =Time Delay

R = Reset

= Undefined

Time

HRDM SERIES

Specifications

Time Delay

Type

Microcontroller circuitry

Range

0.1s - 100m in 5 adjustable ranges or fixed

Repeat Accuracy

±0.5% or 20 ms, whichever is greater

Tolerance

(Factory Calibration)

±1%, ±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

Non-isolated, SPDT

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

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

3 x 2 x 1.5 in. (76.7 x 51.3 x 38.1mm)

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)