1. Product Overview
The DIANQI AHC30A and AHC30B are Din Rail mounted weekly programmable electronic timer switches designed for precise timing control of various electrical appliances and systems. These devices can manage up to 18 ON/OFF programs per week, offering flexibility for applications such as street lighting, advertising signboards, water pumps, and other automated systems.
Figure 1: AHC30A (1NO1NC) and AHC30B (1NO) Timer Switches
Figure 2: Side view of the timer switches with protective covers open.
Video: Overview of the DIANQI Din Rail Timer Switch features and design.
2. Technical Specifications
| Feature | Specification |
|---|---|
| Model Numbers | AHC30A, AHC30B |
| Theory | Electronic |
| Use | Timer Switch |
| Working Voltage | AC220V, AC110V, DC12V, DC24V, DC48V |
| Hysteresis | ≤ 1 sec/day (at 25°C) |
| Minimum Interval | 1 minute |
| ON/OFF Operations | 18 ON & 18 OFF |
| Power Consumption | 7.5 VA (max) |
| Service Life | Mechanically: 107, Electrically: 105 |
| Output Mode | AHC30A: 1 On and 1 Off (1NO1NC); AHC30B: Active Output (1NO) |
| Countdown Range | 59 seconds - 99 minutes 59 seconds |
| Load Capacity | Resistive load 30A |
| Switching Contact | 1 changeover switch |
| Power Reserve | 3 years (lithium battery) |
| Ambient Temperature | -10°C to +40°C |
| Ambient Humidity | 35% to 85% RH |
| Weight | Approx. 150g |
Figure 3: Product Dimensions
3. Setup and Installation
3.1 Initial Preparation
- If the protective lid falls off, please reinstall it securely.
- If the screen is not displaying, press the "RESET" button.
- If the screen still doesn't display after resetting, charge the unit for 12 hours and then try pressing the "RESET" button again.
3.2 Wiring Instructions
Wiring should be performed by a qualified professional and according to local electrical codes. Ensure the power supply is disconnected before wiring.
Figure 4: Basic Wiring Diagrams for AHC30A (1NO 1NC) and AHC30B (1NO)
AHC30A (1NO 1NC): Controls the opening and closing of the circuit without load. Connect input N and L, and output terminals 5, 4, 3 as shown in Figure 4 (left).
AHC30B (1NO): Directly controls the product and provides load (power). Connect input N and L, and output terminals N and L as shown in Figure 4 (right).
Important Wiring Notes:
- The load capacity must not exceed the rated capacity of this switch (30A resistive load).
- If the load capacity exceeds 4.5kW, or if using inductive loads, it is recommended to use AC contactors (e.g., CJX1, LC1) in conjunction with the timer switch to protect the unit. Refer to advanced wiring diagrams if using contactors.
Figure 5: Detailed Technical Data and Wiring Diagrams (Refer to 'WIRING DIAGRAM' section for specific configurations)
4. Operating Instructions
4.1 Button Functions
Figure 6: LCD Display and Control Buttons
- P (Program): Enters/exits programming mode.
- D+ (Day): Adjusts the day of the week.
- H+ (Hour): Adjusts the hour.
- M+ (Minute): Adjusts the minute.
- RESET: Resets the device.
- MANUAL: Toggles output power ON/OFF manually or starts countdown.
4.2 Setting Current Time
- Press the "P" button.
- Press "D+" to adjust the day of the week.
- Press "H+" to adjust the hour.
- Press "M+" to adjust the minute.
- Press "P" again to save and exit.
4.3 Switching 12h/24h Mode
- The timer switch defaults to 24-hour mode.
- To switch to 12-hour mode, press and hold "D+" for 5 seconds.
- To switch back to 24-hour mode, press and hold "D+" for 5 seconds. The LCD will display "AM" or "PM" in 12-hour mode.
4.4 Programming ON/OFF Times (Up to 18 Programs)
This product supports up to 18 ON/OFF programs per week.
| Step | Key | Action / Display |
|---|---|---|
| 1 | Press P | Set the time of the first opening (1 ON) |
| 2 | Press H+/M+ | Display "1 ON", enter the time for the first opening, adjust hours and minutes. |
| 3 | Press D+ | Choose specific days of the week. Select all days (MO TU WE TH FR SA SU) for daily operation. |
| 4 | Press P | Set the time of the first closing (1 OFF) |
| 5 | Press H+/M+ | Display "1 OFF", enter the time for the first shutdown, adjust hours and minutes. |
| 6 | Press D+ | Choose specific days of the week. Select all days for daily operation. |
| 7 | Repeat steps 2-6 | Set additional 2-18 ON/OFF times as needed. |
| 8 | Press P | End programming. |
Notes on Programming:
- If you do not need all 18 settings, press the "P" key repeatedly until the display returns to clock mode.
- To check current settings, press the "MANUAL" button. To cancel an extra timing program group, press "MANUAL" until the screen displays "---" (not 00:00).
- After installing the wiring, press "P" to return to clock mode, then "MANUAL". The red indicator light on the panel signifies that the output load is energized.
- Press "MANUAL" to temporarily toggle the output power ON or OFF.
- When "ON AUTO" or "AUTO OFF" is displayed, the device is in automatic timing state. The timing will not execute immediately but will activate at the next scheduled time.
4.5 Countdown Setting
- Hold down the "P" key, then hold down the "D+" key and press both keys for 3 seconds. The display will show "00:00".
- Set the desired countdown time. Hold down "P" and press "H+" to adjust hours, and "M+" to adjust minutes.
- To start the countdown, press "MANUAL".
- To reset the countdown to 0 midway, press the "P" button.
- To end the countdown, hold down the "P" button, then press the "D+" button for 3 seconds.
4.6 Three-Ring Setting (for short pulse applications)
This feature allows for a brief ON/OFF cycle, useful for applications like an electric bell. If the opening and closing times are set to be the same (e.g., 8:00 ON and 8:00 OFF), the timer will activate for 10 seconds and then stop.
5. Maintenance
- Keep the device clean and free from dust.
- Avoid working in humid, corrosive, or high-heat environments. Exposure to oil or water can affect normal operation.
- Do not disassemble the product. Electronic dry scratches can occur if tampered with.
- The internal lithium battery provides a power reserve of approximately 3 years for memory backup, ensuring programmed settings are retained during power outages.
6. Troubleshooting
- Screen not displaying: First, ensure the protective lid is properly installed. If the screen is still blank, press the "RESET" button. If the issue persists, charge the unit for 12 hours and then press "RESET" again.
- Programming issues: Ensure that the timing settings correspond to the correct day of the week. When setting multiple programs, avoid crossing times (e.g., setting a program from 0 to morning, then morning to afternoon, etc., without overlap).
- Program lost after power outage: The device has a built-in lithium battery for power reserve (approx. 3 years) to retain programming during power loss. If programs are lost, ensure the battery is functional and try resetting and reprogramming.
- Output not switching: Verify wiring connections are correct and secure. Check if the red indicator light is on when the output should be energized. Ensure the load capacity does not exceed 30A and consider using an AC contactor for higher loads.
- Three-Ring and Countdown functions not working: Note that the Three-Ring and Countdown functions cannot be used simultaneously.
7. User Tips
- For optimal performance and longevity, avoid installing the timer switch in environments with extreme temperatures, high humidity, or corrosive substances.
- Regularly check the display to ensure the current time is accurate, especially after initial setup or extended power outages.
- When programming, double-check the ON/OFF times and selected days to prevent unintended operation.
- The internal battery provides approximately 3 years of power reserve for settings. If the device is stored for a long time without power, it may require an initial charge to activate the display and retain settings.
8. Warranty and Support
For any technical assistance, warranty claims, or support inquiries, please contact the seller or manufacturer directly. Keep your purchase records for reference.
