1. Introduction
This manual provides detailed instructions for the installation, setup, programming, and operation of your SINOTIMER CN101S Digital LCD Timer Switch. This device is a 7-day weekly programmable time relay designed for precise control of electrical appliances with intervals as short as 1 second. Please read this manual thoroughly before use to ensure proper functionality and safety.

Figure 1: SINOTIMER CN101S Digital LCD Timer Switch
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to the device:
- Ensure the power supply is disconnected before installation or maintenance.
- Installation should be performed by a qualified electrician.
- Do not exceed the maximum load capacity of 16A (resistive) or 8A (inductive).
- Keep the device away from water and excessive humidity.
- Do not attempt to disassemble or repair the device yourself.
3. Product Overview
3.1. Components and Display

Figure 2: Front Panel and LCD Display Overview
The timer features an easy-to-read LCD display and several buttons for operation:
- Working Indicator: Red LED, indicates power and operation status.
- LCD Screen: Displays time, day, ON/OFF status, and programming details.
- MANUAL Button: Used for manual ON/AUTO/OFF switching.
- P (Timer) Button: Enters programming mode.
- D+ (Day) Button: Adjusts the day of the week or selects programming combinations.
- H+ (Hour) Button: Adjusts the hour.
- M+ (Minute) Button: Adjusts the minute.
- S+ (Second) Button: Adjusts the second.
- R (Reset) Button: Resets the timer.
3.2. Product Demonstration Video
Video 1: Product features and operation demonstration. This video showcases the compact design, easy wiring, 12/24-hour clock formats, 8 ON/OFF programs, 15 programming combinations, 1-second intervals, copy function, countdown timer, automatic time correction, summer time, random mode, manual switch, and energy-saving sleep mode.
4. Specifications
| Feature | Specification |
|---|---|
| Model Number | CN101S |
| Theory | Digital |
| Type | Mini Timer Switch |
| Power Supply Options | 5VDC, 12VDC, 24VDC, 110VAC, 200-250VAC (50/60Hz) |
| Max Load Capacity | Resistive 16A, Inductive 8A (3600W) |
| Power Consumption | <5VA |
| Timing Range | 1 second to 168 hours |
| Minimum Interval | 1 second |
| Programs | 8 ON/OFF settings per day |
| Programming Combinations | 15 Groups (e.g., daily, weekdays, weekends) |
| Memory Backup (Black-out) | 60-90 days (via internal 1.2V rechargeable battery) |
| Average Error | <±2 seconds/day |
| Operating Temperature | -10°C to 50°C |
| Operating Humidity | <95% |
| Dimensions | 60mm x 60mm x 32mm |
| Installation | Panel/Wall mounted |
| Certifications | CE, RoHS, EMC, LVD |
5. Installation
5.1. Wiring Diagrams
Ensure the correct voltage version of the timer is used for your application. Disconnect all power before wiring.

Figure 3: Wiring Diagram for CN101S (200-250VAC)
For 200-250VAC models:
- Connect the Line (L) and Neutral (N) of the power supply to terminals 1 and 2 (INPUT).
- Connect the load (e.g., general electric appliance) to terminals 4 and 5 (POWER OUTPUT). Terminal 3 is Neutral for the output.
- The timer acts as a switch for the Line (L) to the load.

Figure 4: Wiring Diagram for CN101S (5VDC, 12VDC, 24VDC)
For DC models (5VDC, 12VDC, 24VDC):
- Connect the positive (+) and negative (-) of the DC power supply to terminals 1 and 2 (INPUT).
- Connect the DC load to terminals 4 and 5 (POWER OUTPUT). Terminal 3 is not used for DC models.
- The timer switches the positive (+) line to the load.
5.2. Mounting
The CN101S timer is designed for panel or wall mounting. The dimensions are 60x60x32mm.

Figure 5: Installation Diagram
6. Initial Setup
6.1. Setting Current Time
To set the current time and day:
- Set Hour: Press and hold the P button, then press the H+ button to adjust the hour.
- Set Minute: Press and hold the P button, then press the M+ button to adjust the minute.
- Set Day: Press and hold the P button, then press the D+ button to adjust the day of the week.
6.2. 12-hour / 24-hour Format
To switch between 12-hour (AM/PM) and 24-hour clock formats, press and hold the S+ and M+ buttons simultaneously for 3 seconds.
7. Programming and Operation
The CN101S allows for 8 ON/OFF programs per day with 15 flexible programming combinations over a week, and intervals as short as 1 second.
7.1. Setting ON/OFF Programs
- Enter Programming Mode: Press the P button. The LCD will display "1 ON".
- Set 1st ON Time: Use the H+, M+, and S+ buttons to set the desired hour, minute, and second for the first ON event.
- Select Days for 1st ON: Press the D+ button to cycle through 15 different day combinations (e.g., Mon-Sun, Mon-Fri, Sat-Sun, individual days, etc.).
- Set 1st OFF Time: Press the P button again. The LCD will display "1 OFF". Use the H+, M+, and S+ buttons to set the desired hour, minute, and second for the first OFF event.
- Select Days for 1st OFF: Press the D+ button to select the days for the first OFF event.
- Repeat for Additional Programs: Repeat steps 2-5 for up to 8 ON/OFF programs. After setting the 8th OFF program, pressing P will return to the clock display.
- Exit Programming: Press the Clock button to exit programming mode and return to the current time display.
7.2. Manual ON/AUTO/OFF Switching
Press the MANUAL button to cycle through the operating modes: ON (always on), AUTO (follows programmed schedule), and OFF (always off). The current mode is displayed on the LCD.
7.3. Countdown Timer
The timer includes a countdown function, allowing you to set a countdown up to 23 hours, 59 minutes, and 59 seconds. Refer to the product demonstration video (Video 1) for a visual guide on setting this feature.
7.4. Copy Function
The copy function allows you to duplicate previous settings instantly, eliminating the need to reprogram from scratch. This is particularly useful for repeating complex schedules. Refer to the product demonstration video (Video 1) for a visual guide on using this feature.
7.5. Random Mode
For enhanced security, especially when away from home, the random mode can be activated. This mode will randomly adjust the ON/OFF times of your programmed events by a small margin, making it appear as if someone is home. Look for the "RND" indicator on the display when this mode is active. Refer to the product demonstration video (Video 1) for a visual guide on activating this feature.
7.6. Automatic Time Correction
The timer features automatic time correction, with an average error of less than ±2 seconds per day, ensuring high accuracy over time. The video demonstrates a ±30s correction capability.
7.7. Summer Time Adjustment
The timer supports a summer time adjustment feature, allowing for easy switching between standard and daylight saving time. Refer to the product demonstration video (Video 1) for a visual guide on using this feature.
7.8. Energy-Saving Sleep Mode
To conserve energy, the timer can enter an energy-saving sleep mode where the display turns off. Press the R button to activate or deactivate this mode. Refer to the product demonstration video (Video 1) for a visual guide.
8. User Tips
- Precise Programming: The 1-second interval programming allows for very accurate control, ideal for applications requiring short, precise ON/OFF cycles.
- Load Capacity: The timer can handle loads up to 1.5 kilowatts (approximately 16A at 110V or 8A at 220V) without overheating, making it suitable for various household appliances and lighting.
- Power Outage Protection: The internal rechargeable battery ensures that your programmed settings are retained for up to 60-90 days during power failures, so you don't need to reprogram after an outage.
- Versatile Applications: Users have successfully used this timer for automatic lighting (including plant grow lights), pumps, and other electronic equipment. Ensure you select the correct voltage model for your specific application.
9. Maintenance
- Cleaning: Wipe the device with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Battery: The internal 1.2V rechargeable battery provides memory backup during power outages. This battery is designed for long-term use and typically does not require user replacement.
- Storage: If storing the device for an extended period, ensure it is kept in a dry, cool place.
10. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or unresponsive. | No power, or device in sleep mode. | Check power connection. Press the R button to exit sleep mode. |
| Programs not executing. | Timer is in MANUAL ON or OFF mode, or incorrect programming. | Press MANUAL button until "AUTO" is displayed. Review programming steps carefully. |
| Device does not respond after pressing Reset. | Temporary software glitch. | Disconnect power for a few minutes, then reconnect. If the issue persists, contact support. |
| Time is inaccurate. | Minor drift over time. | Adjust the current time as described in Section 6.1. The device has automatic time correction, but occasional manual adjustment may be needed. |
11. Warranty and Support
For any issues not covered in this manual, or for warranty claims, please contact your seller or the manufacturer directly. Please have your product model (CN101S) and purchase details ready.
A detailed user manual in PDF format is available for download: View User Manual (PDF)