1. Introduction
Thank you for choosing the RWRAPS TM919B 30A Programmable Digital Timer Switch. This device is designed for automatic control of various electrical equipment, such as lights, fans, and other appliances, based on a pre-set schedule. It offers high accuracy and flexibility with up to 16 ON/OFF programs per day or week. Please read this manual thoroughly before installation and operation to ensure proper use and safety.
2. Product Overview
The RWRAPS TM919B is a DIN rail mountable digital timer switch featuring an LCD display for time and program settings, along with intuitive control buttons.
Figure 2.1: Front view of the RWRAPS TM919B Digital Timer Switch. This image displays the LCD screen showing the current time and "AUTO" mode, along with the control buttons (P, D+, H+, M+, Reset, Manual) and the ON indicator light. The main power input and output terminals are visible at the top and bottom.
Key Components:
- LCD Display: Shows current time, day, and programming status.
- P (Program) Button: Enters or exits programming mode.
- D+ (Day) Button: Adjusts the day of the week during time setting or program setting.
- H+ (Hour) Button: Adjusts the hour during time setting or program setting.
- M+ (Minute) Button: Adjusts the minute during time setting or program setting.
- RESET Button: Clears all settings and resets the device to factory defaults.
- MANUAL Button: Toggles between ON, AUTO, and OFF modes.
- ON Indicator: Red LED light indicating the switch is currently ON.
- Wiring Terminals: Connections for power input and load output.
3. Specifications
Detailed technical specifications for the TM919B timer switch are provided below.
| Feature | Specification |
|---|---|
| Model | TM919B |
| Power Supply Options | AC220V / DC24V / DC12V / DC5V / AC85-265V / AC110V (This specific model is AC220V) |
| Switch Contact | 1 change-over switch (SPDT) |
| Load Capacity | 30A, 250VAC |
| Programmable ON/OFF Cycles | 16 times a day or a week |
| Minimum Interval | 1 minute |
| Timing Range | 1 minute to 168 hours |
| Average Error | ≤ 1 second / 24 hours (at 25°C) |
| Material | ABS + Electronic Components |
| Color | White |
| Item Weight | Approximately 200 grams (7.1 ounces) |
4. Package Contents
Upon opening the package, please verify that all items are present and in good condition.
- 1 x RWRAPS TM919B Digital Timer Switch
- 1 x User Manual (this document)
5. Safety Information
Please observe the following safety precautions to prevent injury or damage to the device:
- Electrical Hazard: Installation and wiring should only be performed by a qualified electrician or competent person. Ensure power is disconnected at the main circuit breaker before any wiring work.
- Voltage Compatibility: Ensure the power supply voltage matches the specifications of your timer switch (AC220V for this model).
- Load Capacity: Do not exceed the maximum load capacity of 30A. Overloading can cause damage to the device and create a fire hazard.
- Environment: Do not expose the device to moisture, extreme temperatures, or corrosive environments.
- Maintenance: Do not attempt to open or repair the device yourself. Refer all servicing to qualified personnel.
6. Installation and Setup
6.1. Dimensions
Before installation, ensure adequate space for the timer switch.
Figure 6.1: Dimensions of the RWRAPS TM919B Digital Timer Switch. The image shows the front, side, and top views with measurements in centimeters, indicating a height of 8.7cm, width of 3.5cm, and depth of 6.5cm.
6.2. Mounting
The TM919B is designed for DIN rail mounting. Snap the device onto a standard 35mm DIN rail in your electrical panel.
6.3. Wiring Diagram
WARNING: Disconnect all power before performing any wiring. Incorrect wiring can cause electric shock or damage to the device.
Figure 6.2: Wiring terminals and diagram on the RWRAPS TM919B Digital Timer Switch. This view clearly labels the L (Live), N (Neutral) input terminals (1, 2) and the output terminals (3, 4, 5) for Normally Open (NO) and Normally Closed (NC) contacts.
Refer to the diagram on the device and the image above for wiring connections.
- Terminals 1 & 2 (L, N): Connect your AC220V power supply (Live and Neutral) to these terminals to power the timer switch.
- Terminals 3, 4, 5 (NO, COM, NC): These are the output contacts for controlling your load.
- Terminal 4 (COM): Common terminal for the switch output.
- Terminal 5 (NO - Normally Open): The circuit between COM and NO is open when the timer is OFF and closes when the timer is ON. Use this for most applications where you want the device to turn ON when the timer activates.
- Terminal 3 (NC - Normally Closed): The circuit between COM and NC is closed when the timer is OFF and opens when the timer is ON. Use this for applications where you want the device to turn OFF when the timer activates.
Connect the load (e.g., light, fan) to the appropriate output terminals (COM and either NO or NC) and the neutral line.
7. Operating Instructions
7.1. Initial Setup and Reset
- After connecting power, the LCD display should light up.
- Press the RESET button (usually a small recessed button requiring a pointed object like a pen) to clear all previous settings and reset the timer to its default state. The display will show "0:00" and "MO" (Monday).
7.2. Setting Current Time and Day
To set the current time and day of the week:
- Press and hold the P button for approximately 3 seconds until the hour digits start flashing.
- Use the H+ button to adjust the hour.
- Use the M+ button to adjust the minute.
- Use the D+ button to adjust the day of the week (MO, TU, WE, TH, FR, SA, SU).
- Once the correct time and day are set, press the P button again to confirm and exit time setting mode. The display will show the current time and "AUTO".
7.3. Programming ON/OFF Cycles
The TM919B allows for up to 16 ON/OFF programs. Each program consists of an ON time and an OFF time.
- Press the P button once to enter programming mode. The display will show "1 ON" and "0:00".
- Use the D+ button to select the day(s) for this program. You can choose a single day, weekdays, weekends, or all days.
- Use the H+ button to set the desired ON hour.
- Use the M+ button to set the desired ON minute.
- Press the P button again. The display will show "1 OFF" and "0:00".
- Repeat steps 2-4 to set the desired OFF time for the first program.
- Press the P button again to move to the "2 ON" program. Continue this process for all desired 16 ON/OFF programs. If you don't need all 16, simply press P repeatedly to cycle through them until you return to the current time display.
- To exit programming mode at any time, press the MANUAL button.
7.4. Manual Override
The MANUAL button allows you to override the programmed settings temporarily.
- Press the MANUAL button repeatedly to cycle through the following modes:
- ON: The output is continuously ON, ignoring programmed OFF times.
- AUTO: The timer operates according to the programmed ON/OFF cycles.
- OFF: The output is continuously OFF, ignoring programmed ON times.
- Ensure the timer is in AUTO mode for automatic operation.
7.5. Keyboard Lock
To prevent accidental changes to settings, the keyboard can be locked.
- To lock the keyboard, press and hold the H+ button for approximately 3 seconds. A lock icon will appear on the display.
- To unlock, press and hold the H+ button again for approximately 3 seconds. The lock icon will disappear.
8. Maintenance
The RWRAPS TM919B Digital Timer Switch requires minimal maintenance.
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Environment: Ensure the installation environment remains dry and free from excessive dust or corrosive fumes.
- Battery: The device contains an internal battery for retaining settings during power outages. This battery is typically long-lasting and not user-replaceable.
9. Troubleshooting
If you encounter issues with your TM919B timer switch, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank. | No power supply; incorrect wiring. | Check power connections to terminals 1 and 2. Ensure main power is ON. Verify wiring according to Section 6.3. |
| Device not turning ON/OFF as programmed. | Timer is not in AUTO mode; incorrect program settings; keyboard locked. |
|
| Buttons are unresponsive. | Keyboard is locked. | Unlock the keyboard by pressing and holding H+ for 3 seconds (Section 7.5). |
| Time is inaccurate. | Minor drift over time (normal for digital clocks). | Recalibrate the current time as described in Section 7.2. The device has an average error of ≤ 1 second per 24 hours. |
10. Warranty and Support
RWRAPS products are manufactured to high-quality standards. For specific warranty information, please refer to the purchase documentation or contact your retailer.
If you require further assistance or have questions not covered in this manual, please contact RWRAPS customer support through your point of purchase.