1. Introduction
The SINOTIMER TM618H-4 is a versatile digital programmable timer switch designed to automatically control the power supply to various electrical apparatus based on a preset schedule. This module is ideal for applications such as streetlights, neon signs, billboards, electrical appliances, and broadcast equipment. Featuring a high-accuracy CMOS chip and strong anti-jamming capabilities, it offers reliable performance and ease of use. The integrated LCD display provides clear readability for time and program settings.
2. Safety Information
- Ensure the power supply is disconnected before installation or maintenance to prevent electric shock.
- Installation should be performed by a qualified electrician or knowledgeable individual.
- Do not exceed the maximum current and voltage ratings specified for the device.
- Keep the device away from water, moisture, and extreme temperatures.
- Verify all connections are secure before applying power.
3. Product Overview
The TM618H-4 timer switch features a clear LCD display and intuitive buttons for programming. It supports up to 16 ON/OFF programs per day with 15 combinations for weekly scheduling. A built-in rechargeable battery ensures memory backup for your programs during power failures.
3.1. Features
- 16 ON/OFF programs per day, 15 combinations to a week.
- 24 hours / 7 days a week programmable.
- Built-in battery for memory backup (saves programs during power failure).
- Automatic time error correction: +/- 30 seconds weekly.
- Repeat programs with manual ON/OFF settings.
- Easy-to-read LCD display with LED indicators.
- Excellent load capacity with voltage output.
- CLOCK DISPLAY (12/24hr FORMAT).
- SLEEP MODE function.
3.2. Components
The front panel includes an LCD screen displaying time and status, along with several control buttons:
- WEEK: Sets the day of the week.
- HOUR: Sets the hour.
- MIN: Sets the minute.
- RECALL: Recalls programmed settings.
- CLOCK: Used to set the current time and exit programming mode.
- PROG: Enters programming mode to set ON/OFF times.
- MANUAL: Toggles between ON, AUTO, and OFF modes.
- R (Reset): Resets the device to factory defaults.
4. Specifications
| Parameter | Value |
|---|---|
| Model Number | TM618H-4 |
| Type | Timer Switch (Electronic) |
| Power Supply | 12V DC |
| Max. Current of Output Load | 16A (Resistive Load), 8A (Inductive Load) at 250V AC; 20A at 30V DC |
| Power Consumption | 4.5 VA (MAX) |
| Display | LCD |
| Switching Contact | 1 changeover switch |
| Minimum Interval | 1 minute |
| Maximum Interval | 7 days |
| Countdown OFF Time Range | 1 minute ~ 24 hours |
| Timer Range | 1 minute ~ 168 hours |
| Hysteresis | 2 seconds/day (at 25°C) |
| Average Error | 1 second/24 hours (at 25°C) |
| Memory Backup (Black-out) | 60 days (via built-in 1.2V/40mA rechargeable battery) |
| Operating Temperature Range | -20°C to +50°C |
| Material | ABS + Electronic Components |
| Color | White |
| Origin | Mainland China |
| Approx. Package Weight | 0.081 kg |
| Approx. Package Dimensions | 7 x 7 x 5 cm |
5. Setup
5.1. Wiring Diagram
Refer to the diagram below for correct wiring. Ensure the power source matches the device's 12V DC requirement.
- Terminals 1 & 2: 12V DC Input. Connect your 12V DC power source here. Terminal 1 is negative (-), Terminal 2 is positive (+).
- Terminals 4 & 5: Output. These are the switched contacts. Terminal 4 is for the common connection, and Terminal 5 is the normally open contact. Connect your load (e.g., light, pump) to these terminals. The output can handle up to 16A at 250V AC or 20A at 30V DC.
- Terminal 3: Not used for this model (often a normally closed contact in other configurations).
5.2. Initial Power-up and Reset
- After wiring, apply 12V DC power to the timer.
- Press the R (Reset) button using a pointed object (like a pen tip) to clear all previous settings and reset the device. The LCD display will show "0:00" and "MO".
5.3. Setting Current Time
- Press and hold the CLOCK button.
- While holding CLOCK, press WEEK to set the current day of the week.
- While holding CLOCK, press HOUR to set the current hour (12/24hr format).
- While holding CLOCK, press MIN to set the current minute.
- Release the CLOCK button to save the current time.
6. Operating Instructions
6.1. Programming ON/OFF Times
The timer allows for up to 16 ON/OFF programs. Each program consists of an ON time and an OFF time.
- Press the PROG button once. The display will show "1 ON" (Program 1 ON time).
- Press WEEK to select the day(s) for this program. You can choose individual days, weekdays, weekends, or various combinations (15 options).
- Press HOUR to set the desired ON hour.
- Press MIN to set the desired ON minute.
- Press PROG again. The display will show "1 OFF" (Program 1 OFF time).
- Repeat steps 2-4 to set the OFF day(s), hour, and minute for Program 1.
- Continue pressing PROG to cycle through "2 ON", "2 OFF", up to "16 ON", "16 OFF" to set additional programs. If you don't need all 16 programs, simply press CLOCK to exit programming mode.
- To review programs, press RECALL.
6.2. Manual Control (ON/AUTO/OFF)
Press the MANUAL button to cycle through the operating modes:
- ON: The output is continuously ON, overriding all programmed settings.
- AUTO: The timer operates according to the programmed ON/OFF schedules. This is the standard operating mode.
- OFF: The output is continuously OFF, overriding all programmed settings.
Ensure the timer is set to AUTO mode for programmed operations to function.
7. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery: The built-in rechargeable battery maintains program settings during power outages. It recharges automatically when the device is powered. If the display is blank or programs are lost frequently, the battery may need replacement by a qualified technician.
- Storage: If storing the device for an extended period, ensure it is kept in a dry, cool place.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank. | No power supply or internal battery depleted. | Check 12V DC power connection. If power is present, allow time for the internal battery to charge. If problem persists, the battery may need replacement. |
| Programs are not running. | Timer is not in AUTO mode, or programs are incorrectly set. | Press MANUAL until "AUTO" is displayed. Review and re-enter programs if necessary. Ensure current time is set correctly. |
| Output is always ON/OFF. | Timer is in manual ON or OFF mode. | Press MANUAL until "AUTO" is displayed. |
| Time is inaccurate. | Initial time setting error or significant temperature fluctuations. | Reset and re-set the current time. The device has an auto-correction of +/- 30 seconds weekly. |
9. User Tips
No specific user tips were available from reviews or Q&A for this product. However, general advice for digital timers includes:
- Always perform a full reset (using the R button) before initial setup or if you encounter unexpected behavior.
- Double-check your ON and OFF times and selected days to ensure they match your desired schedule.
- For critical applications, periodically verify that the timer is operating as expected.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.