DH48G Digital Timer Relay – 3A, On/Off/Cycle Delay, 9999h

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DH48G Series Digital Time Relay – Advanced Multifunction Timing with Dual Display

The DH48G series is a high-performance, panel‑mount digital time relay designed to meet the most demanding timing requirements in industrial automation, process control, and building management systems. Available in two models – DH48G-2Z (dual‑contact output) and DH48G-1Z (single‑contact output with reset/pause function) – this series offers exceptional flexibility with multiple timing modes, including power on‑delay, release delay, trigger delay, and cycle delay. Featuring a large dual‑row digital display (DH48G-2Z) or single‑row display (DH48G-1Z), a wide range of AC/DC power supply options, and robust 3A output contacts, the DH48G series is the ideal choice for applications ranging from motor control and conveyor sequencing to HVAC management and irrigation scheduling. Its advanced functions, high accuracy, and long service life make it a trusted component for engineers, panel builders, and maintenance professionals worldwide.

Wide Power Supply Compatibility for Global Use

The DH48G series offers an extensive range of power supply options to suit virtually any installation:

· AC voltages: 12VAC, 24VAC, 36VAC, 110VAC, 220VAC, 380VAC (50Hz)
· DC voltages: 24VDC
· Universal AC/DC: 12‑48VAC/DC and 100‑240VAC/DC

This broad compatibility allows the relay to be used in control systems worldwide – from low‑voltage DC logic circuits to standard AC mains up to 380V. The universal power supply options eliminate the need for multiple relay models for different voltages, simplifying inventory and reducing costs. Low power consumption ensures minimal heat generation inside enclosures, making it suitable for densely populated panels.

Compact Panel‑Mount Design with Clear Digital Display

Designed for front‑panel installation, the DH48G series features a compact form factor suitable for standard panel cutouts. The DH48G-2Z model offers a dual‑row digital display, allowing simultaneous viewing of the set value and the elapsed or remaining time – a significant advantage for monitoring timing progress without toggling between displays. The DH48G-1Z features a single‑row display with a clear, easy‑to‑read interface. Both models include intuitive setting buttons for adjusting time values and selecting timing modes, enabling quick, tool‑free configuration. The digital display provides precise, accurate timing information, eliminating the guesswork associated with analog dial settings.

Advanced Timing Modes for Maximum Flexibility

The DH48G series supports multiple timing functions to cover a wide range of applications:

Power On‑Delay: When power is applied, the relay starts timing. After the preset delay, the output contacts change state. This is the most common timing mode, used for star‑delta starting, conveyor delays, and equipment sequencing.

Release Delay (Off‑Delay): When power is removed, the relay continues timing. After the preset delay, the output contacts return to their normal state. Ideal for fan cooling delays, pump shut‑off timing, and equipment cooldown periods.

Trigger Delay: A separate trigger signal (instead of the power supply) initiates the timing sequence. This allows the relay to be controlled independently of the power source, providing greater flexibility in complex control systems.

Cycle Delay: The relay repeatedly cycles between ON and OFF states, with independently adjustable ON and OFF times. Perfect for applications such as alarm flashing, periodic ventilation, irrigation pulsing, and alternating pump control.

Reset/Pause Function (DH48G-1Z only): The DH48G‑1Z includes a dedicated reset/pause input, allowing the user to reset the timing cycle or pause the count at any time. This is particularly useful in batch processing, manual override situations, and test applications.

Two Models for Different Output Requirements

DH48G-2Z: This model features two independent output contacts, allowing a single relay to control two separate circuits simultaneously. It supports power on‑delay, release delay, and cycle delay functions with dual‑contact output. The dual‑row display shows both the set value and current timing status simultaneously. This model is ideal for applications requiring coordinated control of two loads – for example, starting a fan and a pump with a single timing command.

DH48G-1Z: This model features one output contact with the added benefit of reset and pause functions. It supports power on‑delay, release delay, trigger delay, and cycle delay functions. The reset input allows the timing to be reset to zero at any time, while the pause input temporarily stops the timing without losing the accumulated value. This model is ideal for applications where manual intervention or process interruption is common.

Wide Timing Range (Normal and Cycle Delay)

The DH48G series offers two distinct timing modes with generous ranges:

Normal Delay: Up to 9999 seconds, 9999 minutes, or 9999 hours – suitable for very long‑duration timing tasks such as maintenance reminders, extended irrigation cycles, and environmental chamber monitoring.

Cycle Delay: Up to 99 seconds, 99 minutes, or 99 hours – perfect for cyclic operations such as flashing alarms, periodic ventilation, pump alternation, and pulsed dosing.

The ability to switch between seconds, minutes, and hours provides exceptional flexibility, allowing a single relay to handle both short‑duration and long‑duration applications without hardware changes.

Robust Output Contacts for Direct Load Switching

Equipped with output contacts rated at 3A at 380V AC (AC‑15) and 3A at 24V DC (DC‑13), the DH48G series can directly switch a variety of loads, including contactor coils, solenoid valves, small motors, indicator lamps, fans, and resistive heaters. The AC‑15 rating indicates suitability for controlling inductive loads such as contactors and solenoids, while the DC‑13 rating covers DC inductive loads. This versatility makes the relay suitable for direct control of many industrial devices without the need for external contactors.

Long Service Life for Reliable Operation

The DH48G series is built for long‑term reliability:

· Mechanical life: 1 × 10⁶ operations – ensuring years of trouble‑free mechanical performance.
· Electrical life: 1 × 10⁵ operations – guaranteeing reliable switching even in high‑cycle applications.
· Reset time: ≤1s – allowing rapid reset between timing cycles for improved productivity.

Typical Applications

The versatility of the DH48G series makes it ideal for countless applications:

· Motor Control: Star‑delta starting (on‑delay), compressor anti‑short cycling (on‑delay), motor cooldown (release delay).
· Conveyor Systems: Sequential start/stop of belt sections (on‑delay), accumulation zone timing (cycle delay).
· HVAC: Fan delay on/off (on‑delay/release delay), defrost timing (cycle delay), filter maintenance reminders (normal delay).
· Lighting Control: Staircase lighting (on‑delay), corridor occupancy (on‑delay), signage flashing (cycle delay).
· Pump Control: Alternating pump operation (cycle delay), well pump delay (on‑delay), pump cooldown (release delay).
· Industrial Machinery: Welding timers (on‑delay), cooling fan delays (release delay), batch process timing (normal delay).
· Irrigation & Agriculture: Automated watering cycles (cycle or normal delay).
· Test Equipment: Aging tests (normal delay), vibration table cycles (cycle delay).

Easy Installation and Operation

Mounting the DH48G series is straightforward: cut the appropriate panel hole, insert the relay, and secure it with the included brackets. Connect the power supply and load to the appropriate terminals. Use the front‑panel buttons to select the timing mode 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 DH48G series of digital time relays combines advanced multifunction timing capability, a clear digital display, universal AC/DC power supply options, and robust 3A output contacts in a compact panel‑mount design. With support for power on‑delay, release delay, trigger delay, and cycle delay functions, and timing ranges up to 9999 hours, it offers exceptional flexibility for both short and long‑duration control tasks. The choice between the dual‑contact DH48G‑2Z and the reset/pause‑equipped DH48G‑1Z allows engineers to select the exact model for their application. Whether you need precise on‑delay timing for a packaging line or a 9999‑hour maintenance reminder, the DH48G series delivers consistent, repeatable performance. For engineers, panel builders, and maintenance professionals seeking a versatile, high‑precision timing solution, the DH48G series 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.