Omron H3DS-ML Multifunction Analog Timer Relay

Technical Overview

Multifunction solid-state analog timer with 8 modes, 0.1s-120h range, and wide 24-230VAC/24-48VDC supply. Compact 17.5mm DIN rail mount with SPDT output.

Key Features

Eight selectable operating modes including ON-delay, flicker, interval, and one-shot.
Extensive time setting range from 0.1 seconds to 120 hours across 7 selectable scales.
Space-saving 17.5mm width, ideal for high-density control panels.
Wide supply voltage range: 24 to 230 VAC and 24 to 48 VDC.
SPDT (Single Pole Double Throw) relay output with a 5A resistive load rating.
Dual LED indicators for easy monitoring of power (green) and output status (orange).
Conforms to EN61812-1, UL508, and CSA C22.2 No.14 standards.
DIN rail mounting for fast and easy installation.

Technical Specification Matrix

Parameter	Value
Supply Voltage	24 to 230 VAC (50/60 Hz) / 24 to 48 VDC
Operating Voltage Range	85% to 110% of rated supply voltage
Time Setting Range	0.1 s to 120 h
Output Type	Relay, SPDT (1 C/O)
Contact Rating (Resistive)	5 A at 250 VAC, 5 A at 30 VDC
Operating Modes	8 modes (ON-delay, Flicker OFF start, Flicker ON start, Signal ON/OFF-delay, Signal OFF-delay, Interval, Signal ON/OFF-delay, One-shot)
Mounting Type	DIN Rail
Operating Temperature	-10°C to 55°C
IP Rating	IP30 (Body), IP20 (Terminals)
Electrical Life	100,000 operations min. (5 A at 250 VAC)
Mechanical Life	10,000,000 operations min.
Physical Weight (kg)	0.07
Dimensions L x W x H (cm)	7.3 x 1.75 x 8

Industrial Applications

1. Conveyor Belt Sequencing Control

In a material handling system, this timer controls the sequential startup of multiple conveyor belts. An ON-delay function is set for each subsequent conveyor to ensure the receiving belt is already at speed before the feeding belt starts, preventing product pile-ups and system jams.

Problem Solved

Ensures reliable, timed sequencing in automated systems. The wide voltage range (24-230VAC / 24-48VDC) allows for flexible integration into various control panel designs without requiring a specific power supply. The high mechanical life of 10 million operations is ideal for high-cycle conveyor applications.

ON-delayConveyor ControlSequential StartMaterial Handling24VDC

2. Automated Lighting Control for UV Curing

Used in a manufacturing process to control the exposure time of a product to UV light for curing adhesives or coatings. The timer's 'One-shot' or 'Interval' mode is used to energize the UV lamp for a precise duration, from seconds to minutes, ensuring consistent product quality.

Problem Solved

Provides highly accurate and repeatable timing critical for chemical processes like UV curing. The wide time range from 0.1s to 120h allows the same component to be used for different products with varying cure times, and the IP30 rating offers protection from dust within the industrial enclosure.

Interval TimingUV CuringProcess ControlOne-shotSPDT Relay

3. Pump and Fan Control in HVAC Systems

In a commercial HVAC system, the timer manages the delayed shutdown of a fan after the cooling compressor turns off. This 'Signal OFF-delay' function allows the fan to dissipate remaining cool air from the coils, maximizing energy efficiency.

Problem Solved

Improves energy efficiency by programming delayed-off sequences. The timer's ability to operate on standard 230VAC building power simplifies installation, and its SPDT 5A contact rating is sufficient to directly control the coil of a larger fan contactor.

Signal OFF-delayHVAC ControlEnergy EfficiencyFan Control230VAC