1. Product Overview
The SINOTIMER MC401-611 is a smart LCD display thermostat designed for precise temperature control in various applications. It features a universal input, allowing users to select their desired input signal, and supports both Fahrenheit and Celsius temperature units. The device provides one set of control output, configurable as either relay or SSR (Solid State Relay) integral output. It utilizes a high-quality anti-interference chip for stable performance and offers a clear, concise LCD digital display with a minimum resolution of 0.1°C/0.1°F.
Key Features:
- Universal input, user can change desired input signal.
- Fahrenheit/Celsius switchable according to user needs.
- One set of control output (relay/SSR integral).
- Thermometer signal input with digital display and decimal point.
- High-quality anti-interference chip for reliable operation.
- Concise and clear LCD display.
Figure 1: Front view of the MC401-611 Thermostat, displaying Process Value (PV) and Set Value (SV) with control buttons below.
2. Specifications
| Feature | Detail |
|---|---|
| Model Number | MC401-611 |
| Input | K (default setting) |
| Output | Relay/SSR |
| Accuracy Class | 0.5 |
| Alarm | ALM 1 |
| Temperature Unit | Fahrenheit/Celsius switchable |
| Power Supply | 100-240V AC 50/60Hz |
| Operating Temperature Range | 0-1300℃ |
| Product Dimensions (L x W x H) | 4.80 x 9.60 x 10.00 cm (1.89 x 3.78 x 3.94 inches) |
| Item Weight | 0.237 kg (6.9 ounces) |
Figure 2: Product dimensions of the MC401-611 Thermostat.
3. Setup and Installation
3.1 Package Contents:
- 1 x MC401-611 Temperature Controller
- 2 x Mounting Accessories
- 1 x English User Manual (this document)
Figure 3: Package contents of the MC401-611 Temperature Controller.
3.2 Mounting Instructions:
The MC401-611 is designed for panel mounting. Use the provided mounting accessories to secure the device. Ensure adequate ventilation around the unit.
- Cut a rectangular opening in your panel according to the product dimensions (refer to Figure 2).
- Insert the MC401-611 into the opening from the front.
- Attach the two mounting accessories to the sides of the controller from the rear, tightening the screws to secure the unit firmly in place.
Figure 4: Rear view of the MC401-611 showing wiring terminals.
Figure 5: Angled rear view showing terminal connections and mounting points.
3.3 Wiring Diagram:
Important: All wiring should be performed by a qualified electrician and with power disconnected to prevent electric shock. Refer to the diagram on the side of the unit for specific terminal assignments.
The unit supports K-type thermocouple input and offers relay/SSR output. Connect the power supply (100-240V AC 50/60Hz) to the designated terminals. Connect your heating element or control device to the output terminals.
Figure 6: Side label with wiring and specification details.
4. Operating Instructions
4.1 Display Overview:
The LCD display shows two main values:
- PV (Process Value): The current measured temperature.
- SV (Set Value): The desired target temperature.
Figure 7: Close-up of the LCD display showing PV and SV.
4.2 Button Functions:
- SET button: Enters parameter setting mode or confirms a setting.
- R/S (Return/Shift) button: Used to shift digits during setting or return to the main display.
- ▲ (Up) button: Increases the value of a parameter or setpoint.
- ▼ (Down) button: Decreases the value of a parameter or setpoint.
4.3 Setting the Temperature:
- Press the SET button once. The SV display will start flashing.
- Use the ▲ and ▼ buttons to adjust the desired temperature (SV).
- Use the R/S button to move the cursor between digits if needed.
- Press SET again to confirm the new set value. The display will stop flashing.
4.4 Changing Temperature Unit (Celsius/Fahrenheit):
The unit allows switching between Celsius (℃) and Fahrenheit (℉). Refer to the detailed user manual (101 series manual) included in the package for specific steps on accessing and changing this parameter, as it typically involves entering a deeper parameter menu.
5. Maintenance
The MC401-611 Smart LCD Display Thermostat is designed for long-term reliable operation with minimal maintenance.
- Cleaning: Gently wipe the display and casing with a soft, dry cloth. Do not use abrasive cleaners or solvents, as they may damage the plastic or screen.
- Ventilation: Ensure that the ventilation slots on the sides and rear of the unit are not obstructed to prevent overheating.
- Connections: Periodically check wiring connections to ensure they are secure and free from corrosion. Disconnect power before checking connections.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank. | No power supply. | Check power connections (100-240V AC). Ensure power source is active. |
| PV reading is incorrect or "HHHH" / "LLLL". | Thermocouple not connected, faulty, or incorrect type. | Ensure K-type thermocouple is correctly wired to the input terminals. Check for breaks in the thermocouple wire. |
| Output (heating) not activating. | SV is set too low, wiring issue, or internal fault. | Verify SV is above PV. Check output wiring to the heating element. Consult a qualified technician if issues persist. |
| Unit not responding to button presses. | Temporary software glitch. | Disconnect power for 10 seconds, then reconnect. If problem persists, contact support. |
7. Warranty and Support
This SINOTIMER MC401-611 Smart LCD Display Thermostat comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package or contact SINOTIMER customer support for details regarding warranty terms and conditions.
For technical support, troubleshooting assistance beyond this manual, or warranty claims, please contact SINOTIMER customer service through their official website or the contact information provided with your purchase.
You can visit the official SINOTIMER store on Amazon for more information: SINOTIMER Store
