SINOTIMER TM919 Digital Programmable Timer Switch User Manual

1. Introduction

The SINOTIMER TM919 is a versatile digital programmable timer switch designed for automating various electrical loads. It is suitable for controlling lighting, household appliances, and other systems in homes, buildings, and industrial settings. This manual provides detailed instructions for the safe and efficient use of your TM919 timer switch.

Key Features:

• Easy-to-read LCD display with LED indicators.
• Up to 16 ON/OFF programs per day, with 15 combinations for weekly scheduling.
• 24-hour / 7-day programmable operation.
• Countdown function with a maximum of 24 hours to OFF.
• Internal CR2032 battery for memory backup, retaining programs during power failures.
• Manual ON/OFF control.
• Designed for 35mm DIN Rail mounting.

2. Specifications

3. Installation and Wiring

The TM919 timer switch is designed for 35mm DIN rail mounting. Ensure all power is disconnected before installation and wiring.

3.1 Battery Installation

The timer requires a CR2032 battery for memory backup. Install the battery into the compartment as shown in the diagram.

Figure 1: Timer switch with CR2032 battery for memory backup.

3.2 Wiring Diagrams

Connect the timer switch according to the appropriate wiring diagram for your application. Always ensure correct voltage and current ratings.

Figure 2: Simple wiring diagram for direct load control (e.g., light bulb). Connect Live (L) and Neutral (N) to terminals 1 and 2. Connect the load between terminal 3 (Normally Open) and Neutral (N). Terminal 4 is Normally Closed.

Figure 3: Wiring diagram for controlling a contactor. Connect Live (L) and Neutral (N) to terminals 1 and 2. Connect terminal 3 (Normally Open) to the contactor coil (e.g., A1) and the other side of the coil (e.g., A2) to Neutral (N). The load is then controlled by the contactor's main contacts.

For detailed wiring instructions for various models (16A, 30A), refer to the comprehensive diagram below. Note the different terminal configurations for each model.

Figure 4: Detailed wiring diagrams for TM-919 (16A) and TM-919 (30A) models, along with button functions and setting instructions.

4. Operating Instructions

The TM919 timer switch features an LCD display and several buttons for setting time and programs. The buttons are typically labeled as P (Program), D+ (Day), H+ (Hour), M+ (Minute), Manual, and Reset.

4.1 Button Functions:

• P (Program): Enters program setting mode.
• D+ (Day): Adjusts the day of the week.
• H+ (Hour): Adjusts the hour.
• M+ (Minute): Adjusts the minute.
• Manual: Toggles between ON, AUTO, and OFF modes.
• Reset: Clears all settings and resets the timer.

4.2 Setting Current Time:

1. Press the "Clock" button (often combined with "P" or a dedicated clock icon).
2. Press D+, H+, M+ to set the current day, hour, and minute.
3. Release the "Clock" button to save the settings.
4. To switch between 24-hour and 12-hour format, hold the "Clock" button for more than 3 seconds.

4.3 Programming ON/OFF Times:

The timer supports up to 16 ON/OFF programs. Follow these steps to set a program:

1. Press the "P" button once. The display will show "1 ON".
2. Press D+, H+, M+ to set the desired ON time for the first program. You can select specific days or combinations of days (e.g., Mon-Fri, Sat-Sun, every day).
3. Press "P" again. The display will show "1 OFF".
4. Press D+, H+, M+ to set the desired OFF time for the first program.
5. Repeat steps 1-4 for additional programs (up to 16).
6. After setting all desired programs, press the "Clock" button to exit programming mode and save.

The timer switch will automatically turn ON/OFF according to the set programs when it is in "AUTO" mode.

4.4 Manual Control:

Press the "Manual" button to cycle through the operating modes:

• ON: The output is continuously ON.
• AUTO: The output operates according to the programmed schedule.
• OFF: The output is continuously OFF.

4.5 Countdown Function:

The timer includes a countdown function for temporary OFF states:

1. While in normal time display, press the "Countdown" button (often combined with "M+" or a dedicated icon).
2. Use H+ and M+ to set the desired countdown duration (up to 24 hours).
3. Press the "Countdown" button again to start the countdown. The output will turn OFF for the set duration.

4.6 Demonstration Video:

5. Maintenance

The SINOTIMER TM919 is designed for low maintenance. The primary maintenance task is replacing the internal CR2032 battery when it runs low.

5.1 Battery Replacement:

If the display becomes dim or the timer loses its settings frequently, the CR2032 battery may need replacement. To replace the battery:

1. Ensure the timer switch is disconnected from the main power supply.
2. Locate the battery compartment, usually on the side or back of the unit (refer to Figure 1).
3. Carefully open the compartment and remove the old CR2032 battery.
4. Insert a new CR2032 battery, ensuring correct polarity (+/-).
5. Close the battery compartment securely.
6. Reconnect the timer to the power supply and reset the current time and programs if necessary.

6. Troubleshooting

• Timer loses settings after power outage: The internal CR2032 battery might be low or not installed correctly. Replace the battery and ensure it's properly seated.
• Display is dim or blank: Check the power supply connection. If power is present, the internal battery might be depleted. Replace the CR2032 battery.
• Timer not switching load:
  1. Verify the timer is in "AUTO" mode.
  2. Check the programmed ON/OFF times for accuracy.
  3. Ensure the load is correctly wired to the timer's output terminals (3 and 4).
  4. Confirm the load's power requirements do not exceed the timer's 16A/3500W capacity. For higher loads, use a contactor as shown in Figure 3.
  5. Check for loose wiring connections.
• Timer not working in extreme cold (-30°C): While the timer is designed for a wide temperature range, extreme cold might affect the LCD display's visibility. The internal mechanism should still function, but visibility may be reduced.

7. User Tips

• Greenhouse Automation: This timer is highly effective for automating greenhouse lighting or irrigation systems. You can set daily or weekly schedules to ensure consistent operation.
• Power Outage Resilience: The internal battery ensures that your programmed schedules are retained even during power interruptions, making it reliable for critical applications.
• Versatile Control: Use the 16 ON/OFF programs to create complex schedules for various devices, from pool pumps to security lights.

8. Warranty and Support

For warranty information and technical support, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.