1. Introduction
The SINOTIMER TM919B is a 30A 7-day programmable electronic timer switch designed for automatic control of various electrical equipment. It allows you to set specific ON/OFF times over a 24-hour or 7-day cycle, providing convenience and energy efficiency for applications such as streetlights, lamps, water heaters, air conditioners, and more.
Key Features:
- Ideal for household use in DB Boards.
- High capacity: 5000 Watt / 30 Amps.
- Flexible programming: 24 Hours / 7 Days a Week Programmable.
- Automatic time error correction: +/- 30 seconds weekly.
- Multiple programs: Repeat programs with 16 ON/OFF settings.
- Manual ON/OFF control.
2. Product Overview
Figure 1: Front view of the TM919B timer switch, displaying the LCD screen with time and day, and the array of control buttons including P, D+, H+, M+, RESET, and MANUAL.
Figure 2: Angled view of the TM919B timer switch, showing its side profile and the clear protective cover over the buttons.
Figure 3: Side view of the TM919B timer switch, detailing the wiring terminals (L, N, 1, 2, 3, 4, 5) and product specifications like voltage and current ratings.
3. Specifications
| Parameter | Value |
|---|---|
| Temperature Range | -20°C to +50°C |
| Operating Voltage (Ui) | 110V |
| Power Consumption | 4.5 VA (MAX) |
| Display | LCD |
| Switching Contact | 1 changeover switch |
| Programs | 16 ON/OFF settings per day or week |
| Hysteresis | 2 sec/day (at 25°C) |
| Minimum Interval | 1 minute |
| Capacity | 30A 250V AC |
| Black-out Memory | 60 days |
| Timer Range | 1 minute to 168 hours |
| Average Error | 1 second/24 hours (at 25°C) |
| Item Weight | 5.3 ounces (0.2kg) |
| Package Dimensions | 3.95 x 3.2 x 2 inches |
| Screen Size | 1.5 Inches |
4. Installation and Wiring
The TM919B timer switch is designed for DIN rail mounting, making it suitable for integration into electrical distribution boards. Ensure all power is disconnected before attempting installation.
Wiring Diagram:
Figure 4: Wiring diagram for the TM919B. Terminals 1 and 2 are for power input (L and N). Terminals 3, 4, and 5 are for the output, typically used for NO (Normally Open) and NC (Normally Closed) connections to control the load.
- Power Input: Connect the live (L) and neutral (N) wires to terminals 1 and 2 respectively. Ensure the voltage matches the timer's specification (110V for this model).
- Load Connection: The timer has a single changeover switch.
- Terminal 3: Normally Closed (NC) contact.
- Terminal 4: Common (COM) contact.
- Terminal 5: Normally Open (NO) contact.
- Connect your load (e.g., lamp, motor) between the common terminal (4) and either the NO (5) or NC (3) terminal, depending on whether you want the load to be ON or OFF when the timer is in its default state.
- Securely fasten all wires to prevent loose connections.
- Once wiring is complete, restore power and proceed with programming.
5. Operating Instructions and Programming
The TM919B timer allows for up to 16 ON/OFF programs. Follow these steps to set the current time and program the timer.
Button Functions:
- P (Program): Enters programming mode.
- D+ (Day): Adjusts the day of the week.
- H+ (Hour): Adjusts the hour.
- M+ (Minute): Adjusts the minute.
- RESET: Resets all settings to factory defaults. Use a pointed object to press.
- MANUAL: Toggles between ON, AUTO, and OFF modes.
Setting Current Time:
- Press the D+ button to set the current day of the week.
- Press the H+ button to set the current hour.
- Press the M+ button to set the current minute.
- The time will automatically save after a few seconds of inactivity.
Programming ON/OFF Times (Up to 16 Programs):
- Press the P button once. The display will show "1 ON". This is for setting the first ON time.
- Press H+ and M+ to set the desired hour and minute for the first ON event.
- Press D+ to select the days of the week for this program. Options include: every day, specific days (e.g., MO-FR, MO-SA, SA-SU), or individual days. If you want the same setting every day, you do not need to press D+.
- Press the P button again. The display will show "1 OFF". This is for setting the first OFF time.
- Press H+ and M+ to set the desired hour and minute for the first OFF event.
- Press D+ again if you need to specify different days for the OFF event, or leave it if it matches the ON event's days.
- Repeat steps 1-6 for programs 2 through 16 (e.g., "2 ON", "2 OFF", etc.).
- After setting all desired programs, press the MANUAL button repeatedly until "AUTO" is displayed. This ensures the timer operates according to your programmed schedule.
Manual Control:
Press the MANUAL button to cycle through the operating modes:
- ON: The output is continuously ON, overriding programmed settings.
- OFF: The output is continuously OFF, overriding programmed settings.
- AUTO: The timer operates according to the programmed ON/OFF schedules. Ensure the timer is in AUTO mode for automatic operation.
6. Maintenance
The TM919B timer switch requires minimal maintenance. Keep the device clean and free from dust. Do not expose it to excessive moisture or extreme temperatures. If the display becomes dim or unresponsive, check the power supply. The internal battery provides backup for settings during power outages for up to 60 days.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Timer not turning ON/OFF at programmed times. | Not in AUTO mode; incorrect programming; power issue. | Press MANUAL until "AUTO" is displayed. Review programming steps carefully. Check power supply to the timer. |
| Display is blank or dim. | No power supply; internal battery low (unlikely for display). | Check power connections. Ensure the timer is receiving power. |
| Cannot set time or programs. | Buttons unresponsive; unit frozen. | Press the RESET button using a pointed object. This will clear all settings, so you will need to reprogram. |
| Load not switching. | Incorrect wiring; faulty load; timer output issue. | Verify wiring according to the diagram. Test the load independently. If issues persist, contact support. |
8. Warranty and Support
This SINOTIMER product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For warranty claims or technical support, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.
For further assistance, visit the official SINOTIMER store: SINOTIMER Store on Amazon
