DH48S-S 5A Universal Timer – 0.1s-99h Digital Relay

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Description:
DH48S-S Compact Digital Time Relay – Wide Timing Range 0.1s to 99h in a Single Unit

The DH48S-S is a versatile, panel‑mount digital time relay engineered to deliver precise and reliable delay control across a broad spectrum of industrial, commercial, and automation applications. Featuring a universal AC/DC power supply (DC12‑48V and AC24‑380V 50Hz), low power consumption, and a robust 5A output contact, this relay offers exceptional flexibility in a space‑saving 45×45 mm panel cutout. With a single wide timing range from 0.1 seconds to 99 hours – covering short pulses, medium delays, and long‑duration cycles – the DH48S‑S eliminates the need for range switching, simplifying operation and reducing setup errors. Its digital setting method provides exact and repeatable timing, making it superior to analog potentiometer‑based timers. Weighing ≈150g, it is lightweight yet durable, making it an ideal choice for control panels, OEM equipment, and field upgrades worldwide.

Universal Power Supply for Global Deployment

The DH48S‑S operates on a wide voltage range: DC12V‑48V and AC24V‑380V (50Hz). This universal compatibility allows the relay to be used in virtually any control system – from low‑voltage DC logic circuits (e.g., PLC outputs, battery‑backed systems, sensors) to standard AC mains up to 380V, covering industrial power systems across the globe. This eliminates the need for multiple relay models for different voltages, simplifying inventory and reducing costs. The power consumption is remarkably low: DC1.0W / AC1.0VA, which minimizes heat generation inside enclosures and reduces the load on control circuits, making it suitable for energy‑sensitive applications and densely populated panels.

Compact Panel‑Mount Design with Digital Display

Designed for front‑panel installation, the DH48S‑S requires a 45×45 mm mounting hole – a compact footprint that allows high‑density placement on control cabinets, machine consoles, or portable test boxes. Weighing ≈150g, it is lightweight yet sturdy. The front panel features a clear digital display (typically 4‑digit LED or LCD) and intuitive setting buttons for adjusting the time value. The digital display provides precise, easy‑to‑read timing information, eliminating the guesswork associated with analog dial settings. The intuitive layout enables quick, tool‑free setting of the delay, reducing setup errors and training time. The single‑range design means users simply set the desired time – no range selection switches to confuse or misconfigure.

Single Wide Timing Range: 0.1S to 99H

The DH48S‑S offers a single, continuous timing range from 0.1 seconds to 99 hours (99 hours = approximately 4.1 days). This wide range covers virtually all industrial timing needs:

Typical Applications Time Range Examples

High‑speed packaging, welding timers 0.1‑10 seconds
Conveyor delays, fan timing, compressor anti‑short cycling 10 seconds‑10 minutes
HVAC defrost, pump alternation, batch processing 10‑60 minutes
Irrigation cycles, filter maintenance, equipment soak times 1‑99 hours

The single‑range design offers several advantages

· Simplified operation: No need to select between seconds, minutes, or hours ranges – just set the desired value.
· Reduced errors: Eliminates the risk of setting the wrong range and causing unexpected delays.
· Intuitive adjustment: Users can adjust the time continuously across the entire range without jumping between scales.
· Versatility: One relay handles everything from short machine pulses to multi‑day cycles.

The digital setting provides 0.1‑second resolution for short delays and 1‑hour resolution for long delays, with automatic scaling based on the set value. This ensures precise adjustment regardless of the time magnitude.

Robust Output Contact for Direct Load Switching

Equipped with a control output rated at 5A at 220V AC, the DH48S‑S can directly switch a variety of loads, including contactor coils, solenoid valves, small motors, indicator lamps, fans, and resistive heaters. The output contact is designed for long‑term reliability, with a mechanical life of 10⁷ operations and an electrical life of 10³ operations at rated load. This durability makes it suitable for high‑cycle applications such as packaging machinery, conveyor systems, and repetitive industrial processes.

High Insulation and Dielectric Strength for Safety

Safety is paramount in any electrical installation. The DH48S‑S offers an insulation resistance of ≥100MΩ at DC500V, ensuring excellent isolation between the power supply, timing circuit, and output contact. Dielectric strength is rated at 1500V AC between coil/electronics and contacts (BCC) and 1000V AC between open contacts (BOC), guaranteeing protection against voltage surges and reducing the risk of arcing or breakdown. These characteristics make the relay suitable for use in industrial environments where electrical noise and transients are common.

Reliable Performance in Diverse Environments

The DH48S‑S is built to operate reliably under typical industrial conditions:

· Operating temperature: -10°C to +50°C – suitable for unheated workshops, outdoor enclosures, and climate‑controlled rooms.
· Humidity: 35% to 85% (non‑condensing) – performs well in most environments without risk of moisture damage.

These specifications ensure stable timing accuracy and long life even in moderately demanding settings.

Typical Applications

The versatility of the DH48S‑S makes it ideal for countless applications:

· Motor Control: Star‑delta starting (3‑10 seconds), anti‑short cycling for compressors (30‑60 seconds), sequential motor starting.
· Conveyor Systems: Delayed start of belt sections (1‑30 seconds), accumulation zone timing (5‑60 seconds).
· HVAC: Fan delay on/off (30‑60 seconds), defrost timing (5‑30 minutes), filter maintenance reminders (1‑99 hours).
· Lighting Control: Staircase lighting delay (1‑60 seconds), corridor occupancy control (1‑10 minutes), signage flashing.
· Pump Control: Alternating pump operation (10‑60 minutes), well pump delay after power restoration (1‑10 minutes).
· Industrial Machinery: Welding timers (0.1‑5 seconds), cooling fan delays (30‑60 seconds), batch process timing (5‑60 minutes).
· Irrigation & Agriculture: Automated watering cycles (1‑99 hours).
· Test Equipment: Aging tests (1‑99 hours), vibration table cycles, data logging intervals.
· Maintenance Scheduling: Equipment run‑time tracking and service reminders (hours).

Easy Installation and Operation

Mounting the DH48S‑S is straightforward: cut a 45×45 mm square hole in the panel, insert the relay, and secure it with the included brackets. Connect the power supply (DC12‑48V or AC24‑380V) and the load to the appropriate terminals. Use the front‑panel buttons to set the desired time value – from 0.1 seconds to 99 hours. The clear digital display provides real‑time feedback of the set value and timing status. No complex programming or external tools are needed. The single‑range design means no range selection switches to configure, minimizing wiring errors and reducing installation time.

Conclusion

The DH48S‑S Compact Digital Time Relay combines a space‑saving 45×45 mm panel‑mount design, universal AC/DC power supply (24‑380V AC / 12‑48V DC), low power consumption, and a robust 5A output with a single wide timing range from 0.1 seconds to 99 hours. Its digital display, high precision, and long mechanical life ensure reliable operation in demanding industrial environments. The single‑range design simplifies operation, reduces setup errors, and eliminates the need for range selection – making it particularly user‑friendly for operators and maintenance personnel. Whether you need a precise 0.1‑second delay for a packaging line or a 99‑hour cycle for an irrigation system, the DH48S‑S delivers consistent, repeatable performance. For engineers, panel builders, and maintenance professionals seeking an affordable, versatile, and easy‑to‑use timing solution, the DH48S‑S is the perfect choice. Install it once and enjoy years of dependable service.

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Competitive Advantage:

Advantages of Wenzhou DAQUAN Electric Co., Ltd

1. Innovation Leadership
With 258 patents and 27 years of industry experience, we lead in R&D of industrial control devices like relays and timers, ensuring cutting-edge product performance.

2. Global Certifications
Our products hold CE, ROHS, IEC, TUV certifications plus ISO9001, meeting strict international standards for seamless global market access.

3. Scale Supply Stability
Backed by a 7,800㎡ factory, 499-strong team, and 70M RMB annual output, we guarantee efficient production and timely delivery for bulk orders.