1. Introduction
The SINOTIMER TM919A-2 is a programmable digital time switch designed for precise control of electrical appliances. It features a clear LCD display, 16 ON/OFF programs per day, and a countdown function, making it suitable for various household and industrial applications. This manual provides detailed instructions for the safe and efficient use of your time switch.
2. 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.
- Built-in CR2032 battery for memory backup, retaining programs during power failures.
- Manual ON/OFF control capability.
- Designed for 35mm DIN Rail mounting.
- Functions include Clock display (12hr/24hr format), Timer, and Countdown.
3. Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | TM919A-2 |
| Power Supply | 220V AC 50/60Hz |
| Capacity | 16A |
| Timing Range | 1 minute to 168 hours |
| Programs | 16 ON/OFF per day |
| Power Consumption | Less than 5VA |
| Black-out Memory | 90 days (program retention) |
| Average Error | Less than 2 seconds per day |
| Temperature Range | -10°C to 50°C |
| Humidity | Less than 95% |
| Installation Dimensions | 87 x 65 x 36mm |
| Output | Switch Output 1NO+1NC |
| Material | ABS |
| Color | White |
| Backup Battery | CR2032 |
4. Package Contents
- 1 x TM919A-2 Timer Switch
- 1 x English User Manual
5. Installation
WARNING: Installation should only be performed by a qualified electrician. Ensure power is disconnected before installation to prevent electric shock.
- Mounting: The TM919A-2 is designed for 35mm DIN rail mounting. Snap the timer onto the DIN rail securely.
- Wiring: Refer to the wiring diagram below. Connect the power supply and load according to the labels on the timer.
- Terminals 1 (L) and 2 (N): Connect to the AC 220V power supply.
- Terminals 3 (Common), 4 (NO - Normally Open), and 5 (NC - Normally Closed): These are the switch output terminals. Connect your load (e.g., light, fan) between the common terminal (3) and either the Normally Open (4) or Normally Closed (5) terminal, depending on your application's requirements. For most applications, you will use NO (4) to switch the load ON when the timer activates.
6. Operating Instructions
6.1 Initial Setup and Clock Setting
- Power On: After connecting the power, the LCD display will light up.
- Reset: Press the RESET button (usually a small recessed button, use a pointed object) to clear all previous settings and initialize the timer.
- Set Current Time:
- Press and hold the CLOCK button (often indicated by a clock icon, or implied when setting time).
- While holding CLOCK, press D+ to set the current day of the week.
- While holding CLOCK, press H+ to set the current hour.
- While holding CLOCK, press M+ to set the current minute.
- 12/24 Hour Format: Press the CLOCK button and then the MANUAL button simultaneously to toggle between 12-hour and 24-hour display formats.
6.2 Programming ON/OFF Cycles
The timer supports up to 16 ON/OFF programs. Each program consists of an ON time and an OFF time.
- Press the P (Program) button once. The display will show "1 ON".
- Press D+ to select the day(s) for this program. You can choose a single day, weekdays, weekends, or various combinations (e.g., Mon-Fri, Mon-Sat, etc.).
- Press H+ to set the hour for the first ON event.
- Press M+ to set the minute for the first ON event.
- Press P again. The display will show "1 OFF".
- Repeat steps 2-4 to set the day(s), hour, and minute for the first OFF event.
- Continue pressing P to cycle through "2 ON", "2 OFF", up to "16 ON", "16 OFF", setting each program as needed.
- After setting all desired programs, press the CLOCK button to exit programming mode and return to the current time display.
6.3 Manual Control
The MANUAL button allows you to override the programmed settings temporarily.
- Press MANUAL repeatedly to cycle through the modes: AUTO ON, AUTO OFF, ON, OFF.
- AUTO ON: The timer will follow the programmed schedule, and the output is currently ON.
- AUTO OFF: The timer will follow the programmed schedule, and the output is currently OFF.
- ON: The output is forced ON, overriding any programmed OFF times.
- OFF: The output is forced OFF, overriding any programmed ON times.
6.4 Countdown Function
The countdown function allows you to set a specific duration after which the timer will switch OFF.
- From the main clock display, press the COUNTDOWN button (if available, or a combination of buttons might be used, refer to specific button labels if different from generic).
- Use H+ and M+ to set the desired countdown duration (up to 24 hours).
- Press COUNTDOWN again to start the countdown. The display will show the remaining time.
- Once the countdown reaches zero, the output will switch OFF.
7. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: The internal CR2032 battery provides memory backup. If the display becomes dim or programs are lost frequently during power outages, the battery may need replacement. Carefully open the battery compartment (usually on the back or side) and replace the CR2032 battery, ensuring correct polarity.
- Environmental Conditions: Ensure the timer is operated within the specified temperature (-10~50°C) and humidity (less than 95%) ranges to ensure optimal performance and longevity.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | No power supply or weak internal battery. | Check power connections. Replace CR2032 backup battery. |
| Programs are not running. | Timer is in manual ON/OFF mode, or programs are incorrectly set. | Press MANUAL until "AUTO ON" or "AUTO OFF" is displayed. Recheck program settings. |
| Time is inaccurate. | Internal clock drift (minimal, less than 2s/day). | Reset and set the current time periodically if high precision is required. |
| Load does not switch. | Incorrect wiring or faulty load. | Verify wiring according to the diagram. Test the load independently. Ensure the timer's capacity (16A) is not exceeded. |
| Programs are lost after power outage. | Backup battery is dead or missing. | Replace the CR2032 backup battery. |
9. User Tips
No specific user tips from reviews or Q&A are available at this time. However, general tips for using programmable timers include:
- Always perform a full reset after installation or if you encounter unexpected behavior.
- Double-check your ON/OFF program times and selected days to ensure they match your desired schedule.
- For critical applications, periodically verify the timer's operation.
10. Warranty and Support
This 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.
