DH48S-2Z 5A Timer – 0.01s-99h, Dual Output Delay Relay

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Description:
DH48S-2Z Digital Time Relay – High Precision Timing with Dual Output Contacts

The DH48S-2Z is a high‑performance, panel‑mount digital time relay engineered to deliver precise and reliable delay control across a wide spectrum of industrial, commercial, and automation applications. Featuring a universal AC/DC power supply (DC12‑48V and AC24‑380V 50Hz), low power consumption, a robust 5A output contact, and dual independent output contacts (2Z), this relay offers exceptional flexibility in a space‑saving 45×45 mm panel cutout. With three selectable timing ranges – 0.01S~99.99S (high‑resolution seconds), 1S~99M99S (minutes and seconds), and 1M~99H99M (hours and minutes) – the DH48S‑2Z can handle everything from ultra‑short machine pulses to long‑duration cycles in HVAC, lighting, motor control, and process automation. 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‑2Z 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‑2Z 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 and selecting the timing range. 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.

Three Timing Ranges for Maximum Flexibility

The DH48S‑2Z offers three independent timing ranges, each continuously adjustable via front‑panel buttons:

Time Range Resolution Typical Applications

0.01S ~ 99.99S 0.01 second High‑speed packaging, welding timers, pulse stretching, precise short delays
1S ~ 99M99S 1 second / 1 minute Conveyor sequencing, fan delays, compressor anti‑short cycling, general industrial timing
1M ~ 99H99M 1 minute / 1 hour Irrigation scheduling, HVAC defrost, maintenance reminders, long‑duration processes

Range 1 (0.01S~99.99S): With a resolution of 0.01 seconds, this range is ideal for applications requiring very precise short‑duration timing, such as high‑speed packaging lines, welding controllers, pulse stretching, and precision testing equipment. The 0.01‑second resolution ensures that even the shortest delays can be set with exceptional accuracy.

Range 2 (1S~99M99S): This range offers timing up to 99 minutes and 99 seconds, with a resolution of 1 second or 1 minute. It is perfect for conveyor belt sequencing, fan delay after motor stop, compressor anti‑short cycling, and other general industrial timing applications where moderate duration and good resolution are required.

Range 3 (1M~99H99M): With a maximum of 99 hours and 99 minutes, this range is designed for long‑duration processes such as irrigation scheduling, environmental chamber cycling, filter maintenance reminders, and equipment soak times. The combination of hours and minutes display provides clear, intuitive reading of long time periods.

Dual Output Contacts (2Z) for Coordinated Control

A key feature of the DH48S‑2Z is its two independent output contacts (2Z). This allows a single relay to control two separate circuits simultaneously – for example, starting a fan and a pump with a single timing command, or controlling both a main load and an auxiliary indicator. The two contacts can be configured for different functions depending on the timing mode selected (on‑delay, off‑delay, cycle delay, etc.), providing exceptional control flexibility.

Each output contact is rated at 5A at 220V AC, capable of directly switching a variety of loads, including contactor coils, solenoid valves, small motors, indicator lamps, fans, and resistive heaters. The output contacts are 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‑2Z offers an insulation resistance of ≥100MΩ at DC500V, ensuring excellent isolation between the power supply, timing circuit, and output contacts. 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‑2Z 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‑2Z makes it ideal for countless applications:

· Motor Control: Star‑delta starting (using 0.5‑10s in range 1), anti‑short cycling for compressors (30‑60s in range 2).
· Conveyor Systems: Delayed start of belt sections (range 2), accumulation zone timing (range 1 or 2).
· HVAC: Fan delay on/off (range 2), defrost timing (range 2 or 3), filter maintenance reminders (range 3).
· Lighting Control: Staircase lighting delay (range 2), corridor occupancy control (range 2), signage flashing.
· Pump Control: Alternating pump operation (range 2 or 3), well pump delay (range 2).
· Industrial Machinery: Welding timers (range 1 with 0.01s resolution), cooling fan delays (range 2), batch process timing (range 3).
· Irrigation & Agriculture: Automated watering cycles (range 3).
· Test Equipment: Aging tests (range 3), vibration table cycles, precision timing experiments (range 1).

Easy Installation and Operation

Mounting the DH48S‑2Z 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 loads to the appropriate output terminals. Use the front‑panel buttons to select the timing range and set the desired time value. The clear digital display provides real‑time feedback of the set value and timing status. No complex programming or external tools are needed. The clear labeling and logical layout minimize wiring errors and reduce installation time.

Conclusion

The DH48S‑2Z 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 robust 5A dual output contacts with three selectable timing ranges covering 0.01 seconds to 99 hours 99 minutes. Its high precision (0.01s resolution), digital display, and long mechanical life ensure reliable operation in demanding industrial environments. Whether you need a precise 0.01‑second delay for a packaging line or a 99‑hour cycle for an irrigation system, the DH48S‑2Z delivers consistent, repeatable performance. For engineers, panel builders, and maintenance professionals seeking an affordable, versatile, and high‑precision timing solution, the DH48S‑2Z 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.