DIN Rail Digital Programmable Timer Switch

1. Introduction

The SINOTIMER TM624-2 is a digital programmable timer switch designed for controlling circuits with a predetermined program. It is ideal for applications such as school or factory bell control, offering up to 40 programmable ON/OFF groups with bell durations from 1 to 99 seconds. This device operates on AC 220V 50/60Hz and is designed for DIN rail mounting or screw installation.

2. Safety Information

Please read and understand all instructions before installation and operation. Failure to follow these instructions may result in electric shock, fire, or serious injury. This product should only be installed by a qualified electrician in accordance with local electrical codes.

• Ensure power is disconnected before installation or maintenance.
• Do not exceed the specified load ratings.
• The switch is designed for AC 220V power supply only. Do not connect to other power sources.
• Keep the device away from moisture and extreme temperatures.

3. Specifications

Figure 1: Outside dimensions and installation dimensions of TM624-2.

4. Package Contents

• 1 x SINOTIMER TM624-2 Digital Programmable Timer Switch
• 1 x Instruction Manual

5. Setup and Installation

The TM624-2 timer switch can be installed using a 35mm DIN rail or by screws. Ensure the power supply is disconnected before proceeding with wiring.

5.1 Wiring Methods

Choose the appropriate wiring method based on your load and power supply configuration:

5.1.1 Direct Single-Phase Controlled Method

For single-phase controlled appliances where the working current does not exceed the rated value of this switch (AC-15 220V 3A). If the load has a great starting current impact, consider using an AC contactor expansion control method.

Figure 2: Direct single-phase controlled wiring diagram.

5.1.2 Single-Phase Expansion Controlled Method

For single-phase controlled appliances where the working current exceeds the rated value of this switch. An external AC contactor is required for this method.

Figure 3: Single-phase expansion controlled wiring diagram.

5.1.3 Three-Phase Operating Method (220V Contactor Coil)

For three-phase controlled appliances. An external AC contactor with a 220V coil voltage is required.

Figure 4: Three-phase controlled wiring diagram (220V for contactor coil).

5.1.4 Three-Phase Operating Method (380V Contactor Coil)

For three-phase controlled appliances. An external AC contactor with a 380V coil voltage is required.

Figure 5: Three-phase controlled wiring diagram (380V for contactor coil).

6. Operating Instructions

The control panel features five buttons: MD (mode), R (recall), < (left-shift), - (minus), and + (plus).

6.1 Unlocking the Device

To unlock the device and enable programming, long press the MD button for 3 seconds. The "LOCK" indicator on the display will disappear.

6.2 Setting Current Date and Time

1. Long press the MD button for 3 seconds to unlock the device.
2. Press the < (left-shift) button to select the digit or parameter you wish to adjust (minutes, hours, day of the week). The selected position will flash.
3. Use the - and + buttons to adjust the value.
4. Repeat for all necessary time and date settings.

6.3 Setting Bell Parameters (ON/OFF Times)

The device supports up to 40 ON/OFF groups for bell control.

1. After setting the current time, press the MD button to enter the first bell time setting (e.g., "1 ON").
2. Use the < button to select the minutes, hours, or days of the week for the bell to ring. The selected position will flash.
3. Use the - and + buttons to adjust the values.
4. Press MD again to move to the next bell group setting (e.g., "1 OFF", then "2 ON", etc.).
5. Repeat these steps for all desired bell groups (up to 40).
6. To eliminate a set group, press the R button. The LCD will display "----". Press R again to recall the set group.

6.4 Setting Bell Duration

The bell duration can be set from 1 to 99 seconds.

1. After completing the ON/OFF time settings, press MD and R simultaneously to enter the bell duration setting.
2. Use the - and + buttons to adjust the duration (e.g., 15 seconds).
3. Press the MD button to exit the setting mode.

6.5 Manual/Automatic Mode Switching

To switch between manual and automatic operation modes:

• Press the MD and + buttons simultaneously.
• Continuously pressing these buttons will cycle through the following modes: "AUTO OFF", "ON", "ON AUTO", and "OFF".
• Select "ON AUTO" for the timer to operate according to your programmed schedule.
• Use "ON" or "OFF" for temporary manual control of the circuit.

7. Troubleshooting

• Device not powering on or display not working: Ensure the power supply is correctly connected to AC 220V.
• Automatic control not functioning: Check if "AUTO" is displayed in the lower right corner of the screen. If not, switch to "ON AUTO" mode as described in Section 6.5.
• Relay not activating: The internal battery only powers the LCD display and settings. It does not drive the relay output. Ensure the main power supply (A1, A2 terminals) is connected and active to power the relay.
• Errors or unexpected behavior: If you encounter errors, short terminals 3 and 4 to reset the device. After a reset, all settings will need to be re-entered.
• Bell not ringing: Verify the bell duration is set correctly (Section 6.4) and the ON/OFF times are programmed as desired (Section 6.3).

8. Maintenance

The SINOTIMER TM624-2 requires minimal maintenance. Keep the device clean and free from dust. Do not attempt to open or repair the device yourself. Refer to qualified personnel for any servicing needs.

End-of-Life Recycling: When the product reaches the end of its service life, please recycle it and its components responsibly according to local regulations to protect the environment.

9. User Tips

• Flexible Scheduling: The timer's 40 groups allow for highly flexible scheduling. You can set multiple short intervals throughout the day, for example, a 10-second bell every 20 minutes, or a 20-second bell every 12 hours.
• Manual Override: Use the MD + + button combination to quickly switch to ON or OFF mode for immediate manual control of the connected appliance, without disturbing your programmed schedule.
• Wiring Check: If the bell does not ring after setup, double-check all wiring connections, especially the power supply to the bell and the timer's output terminals (15, 16, 18).

10. Warranty and Support

For warranty information and technical support, please contact the seller or refer to the official product documentation. Keep your purchase receipt for warranty claims.

For a detailed user manual, please refer to the official PDF document: SINOTIMER TM624-2 User Manual (PDF)