Omron H3DS-ML — 8-Mode Multi-Function Timer
SKU: H3DS-MLUSD 30.00
H3DS-series 17.5 mm DIN-rail multi-function timer, 8 timing modes, 0.1 s to 120 h range, 24–230 VAC / 24–48 VDC supply, SPDT output, dial-locking — only multi-mode timer in the catalog.
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Product Overview
The H3DS-ML is a compact 17.5 mm DIN-rail multi-mode timer from the Omron H3DS family. It is the broadest-coverage timer in the Hengyixin catalogue — eight timing functions selectable from the front dial, eight overlapping time ranges from 0.1 s to 120 hours, and a single universal supply that accepts 24 to 230 VAC or 24 to 48 VDC. The 'ML' suffix decodes as: 'M' for multi-mode (eight timing functions), 'L' for the locking dial feature that prevents inadvertent change of the time-range or mode setting.
Eight timing modes from one unit
The H3DS-ML collapses what would otherwise be eight separate timing relays into one part number.
Time-range dial, eight overlapping ranges
The Time Range selector switches between 0.1 to 1 s, 1 to 10 s, 0.1 to 1 min, 1 to 10 min, 0.1 to 1 h, 1 to 10 h, 0.1 to 1 h × 10 (i.e. 1 to 10 h × 10 = effectively 10 to 100 h), and 1 to 10 h × 10 (10 to 100 h). The latter two ranges stretch the timer to its 120 h ceiling for weekend off-delay applications and pump-station purge cycles.
Key Features
- 17.5 mm wide DIN-rail enclosure — half the width of standard H3 timers
- Eight selectable timing functions in one part number
- Eight overlapping time ranges from 0.1 s to 120 h, including star-delta transfer time
- Universal supply: 24 to 230 VAC and 24 to 48 VDC on the same unit
- SPDT output, 5 A at 250 VAC / 30 VDC resistive
- Time accuracy ±0.5 % FS at 25 °C, ±1 % at -10 to +55 °C
- Lockable mode and range dials — optional Y92S-2 lock key to prevent operator tampering
- Smart Dial: concentric inner/outer time-setting dials for fast range/setting without ambiguity
- SKU: H3DS-ML
- Series: H3DS (DIN-rail mounted solid-state timer)
- Voltage: 24 TO 230 VAC
- I/O: 1 I/O
Best-Fit Applications
- Star-delta motor starting — timer transfers from star winding to delta winding with adjustable transfer pause on 22 kW pumps.
- Conveyor restart time delay after E-stop — ON-delay prevents instant restarts that crowd workers into moving parts
- Pump station purge cycle — interval mode retriggers the timer every 24 hours to cycle solenoid flushing valves
- Heater pre-heat before machine start — long ON-delay on packaging-machine shrink tunnels
Buying Checklist
- Pick the H3DS-ML when you need any of the 8 timing functions in one part number — minimises stock-keeping
- Pick the H3DS-ML when panel space is tight — half-width 17.5 mm saves space vs the 22.5 mm H3CR series it replaces
- Pick the H3DS-ML when you need 230 VAC and 24 VDC supply acceptance on the same unit — only one SKU to stock
- Pick the H3DS-AL when you need AC-only timing without control input
- Pick the H3DS-SL when you need only 24 VAC/DC supply
- Pick the H3DS-FL for star-delta only with star-to-delta transfer
Technical Specifications
| Model | H3DS-ML AC/DC |
|---|---|
| Series | H3DS (DIN-rail mounted solid-state timer) |
| Mounting Width | 17.5 mm (W) × 80 (H) × 73 (D) mm |
| Operating Modes | 8 (ON-delay, ON-delay with control, OFF-delay, Flicker-OFF start, Flicker-ON start, Interval, One-shot, Star-delta) |
| Time Range | 0.1 s to 120 h across 8 ranges |
| Time Setting Range | 0.1 s to 1 s, 1 to 10 s, 0.1 to 1 min, 1 to 10 min, 0.1 to 1 h, 1 to 10 h, 1 to 10 h, 10 to 120 h |
| Supply Voltage | 24 to 230 VAC 50/60 Hz and 24 to 48 VDC (one universal range) |
| Power Consumption | ≤ 4 VA at 230 VAC; ≤ 2 W at 24 VDC |
| Output | SPDT (1 Form C), 5 A / 250 VAC resistive, 5 A / 30 VDC resistive |
| Operating Temperature | -10 to +55 °C (no icing/condensation) |
| Storage Temperature | -25 to +65 °C |
| Certifications | UL, CSA, CCC, CE (EN 61812-1) |
Resources & Downloads
FAQ for H3DS-ML
How do I know which timing mode is currently selected on the H3DS-ML?
The mode dial is on the front face behind a flip-up window. The current mode is printed on the dial: 'A' = ON-delay, 'B' = ON-delay with control input, 'C' = OFF-delay, 'D' = Flicker-OFF start, 'E' = Flicker-ON start, 'F' = Interval, 'G' = One-shot, 'Y' = Star-delta. The label is printed in a window next to the dial, and the timer comes with a quick-reference card that lists the timing chart for each mode.
Can the H3DS-ML be used to start a 22 kW motor in star-delta?
Yes — the Star-delta mode (Y) is the classical motor starting sequence. Wire the SPDT contact in series with the delta contactor; the timer's transfer time is the star-to-delta pause and is settable on the 0.1 to 1 s range for typical 30–100 ms transitions. Set the time range to the slowest setting that ensures the motor has pulled into star synchronism — usually 5 to 8 seconds for 22 kW.
What replaces the older H3CR-H8L timer?
The H3DS-ML is the direct replacement for the discontinued H3CR-H8L (8-mode, 11-pin plug-in timer) and H3CR-A8 (8-mode, 11-pin with control input) — it offers identical 8 timing functions in a half-width 17.5 mm DIN-rail package instead of the H3CR's 22.5 mm plug-in body. If the panel was wired for 11-pin octal socket, add the Y92F-78 8-pin to 11-pin adapter or move the wiring to a screw-terminal block.
Why is there a 230 VAC supply option on a 24 VDC timer?
Industrial panels commonly mix 24 VDC control circuits with 230 VAC power for contactor coils. The H3DS-ML AC/DC version accepts both, which means panel builders don't have to specify two different timers for each voltage. The internal power supply uses a switching regulator, so input voltage variation has negligible effect on timing accuracy.
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