Introduction
The ManHua TB118N is a robust mechanical timer switch designed for precise control of electrical circuits. It features a 24-hour cycle with a minimum setting time of 15 minutes, making it suitable for various applications such as charging timing, street light control, advertising, and indoor power saving. This manual provides essential information for the safe and effective installation, operation, and maintenance of your TB118N timer switch.
Safety Information
- Always disconnect power before installing or servicing the timer switch to prevent electric shock.
- Installation should be performed by a qualified electrician or competent person.
- Ensure all wiring connections are secure and comply with local electrical codes.
- Do not exceed the specified voltage and current ratings of the device.
- Keep the device away from moisture and extreme temperatures.
- The transparent protective cover should always be in place during operation to prevent accidental contact with live parts.
Product Overview
The ManHua TB118N mechanical timer switch is designed for ease of use and reliability. Below are the key components and their functions:
- Dial Plate: The central rotating dial marked with 24 hours, used for setting the current time and programming ON/OFF cycles.
- Present Time Indicator: A small arrow or mark indicating the current time on the dial.
- Manual ON/OFF Switch: A toggle switch to manually override the timer program (ON, OFF, or AUTO).
- Mounting Hole: For securing the timer switch during installation.
- Spare Time-Setting Pin Storage: A compartment to store unused ON/OFF pins.
- Power Terminals (S1, S2): Connections for the incoming power supply (100-240VAC).
- Load Terminals (L1, L2): Connections for the device or circuit to be controlled.
- Battery: The unit includes a battery for power failure backup, rated at 15A 100VAC.
Specifications
| Attribute | Value |
|---|---|
| Brand Name | ManHua |
| Model Number | TB118N |
| Type | Mini |
| Theory | Mechanical |
| Use | Timer Switch |
| Origin | Mainland China |
| Power Voltage | 100-240VAC |
| Operating Voltage | 100VAC |
| Frequency | 50-60Hz |
| Min. Setting Time | 15 minutes |
| Cycle | 24 hours |
| Circuit Quantity | 1 circuit |
| Power Consumption | 2W |
| Time Precision | ±5s/month (at 25℃) |
| Environment Temperature | -10~50 celsius |
| Environment Humidity | Less than 85% |
| Battery Included | Yes |
| High-concerned chemical | None |
Setup
Mounting
The TB118N timer switch is designed for Din Rail mounting. Ensure the Din Rail is securely installed in a suitable electrical enclosure. Snap the timer switch onto the Din Rail until it clicks into place.
Wiring Diagram
Refer to the circuit diagram below for proper wiring. Ensure all connections are tight and correct before applying power.
Wiring Instructions:
- Connect the incoming power supply (100-240VAC, 50-60Hz) to terminals S1 and S2.
- Connect the load (device to be controlled) to terminals L1 and L2.
- Ensure the total current of the load does not exceed the timer's maximum rating.
Operating Instructions
Setting the Current Time
- Rotate the central dial plate clockwise until the present time indicator aligns with the current time of day. The dial is marked in 24-hour format.
Programming ON/OFF Cycles
The dial plate has small segments around its perimeter. Each segment represents 15 minutes. To program an ON or OFF period:
- Push the pins outwards for the periods you want the connected device to be ON.
- Leave the pins inwards for the periods you want the connected device to be OFF.
- Each pin corresponds to a 15-minute interval. For example, to set a device ON for 1 hour, push out 4 consecutive pins.
Manual Override Switch
The manual ON/OFF switch allows you to temporarily override the programmed settings:
- ON: The connected device will remain ON continuously, regardless of the program.
- OFF: The connected device will remain OFF continuously, regardless of the program.
- AUTO (Timer Symbol): The timer will operate according to the programmed ON/OFF cycles.
Always return the switch to the AUTO position for programmed operation.
Maintenance
- Regularly inspect the timer switch for any signs of damage or loose connections.
- Keep the unit clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- The internal battery provides backup power in case of a power outage. If the timer loses time after a power interruption, the battery may need to be replaced by a qualified technician.
- Ensure the transparent protective cover is always clean and securely closed.
Troubleshooting
- Timer not switching ON/OFF:
- Check if the manual override switch is set to AUTO (timer symbol).
- Verify that the ON/OFF pins are correctly set for the desired times.
- Ensure the current time is correctly set on the dial.
- Check for power supply to the S1/S2 terminals.
- Timer not keeping accurate time:
- The internal battery might be low or depleted. Consult a qualified technician for battery replacement.
- Ensure the power supply is stable and within the specified voltage range.
- Device connected to timer is not working:
- Check the load connections (L1/L2).
- Ensure the connected device itself is functional.
- Verify that the timer is receiving power and is in an ON state (either programmed or manual override).
User Tips
- For applications requiring frequent changes to the schedule, consider marking your most common ON/OFF pin configurations for quick setup.
- When setting the current time, ensure you rotate the dial clockwise to avoid damaging the internal mechanism.
- Utilize the transparent protective cover to shield the dial and pins from dust and accidental adjustments.
- The mechanical nature of this timer makes it highly reliable for consistent daily scheduling.
Warranty and Support
For warranty information or technical support, please refer to the documentation provided with your purchase or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.