2. Main Features

• Model: SCP451-11

• Universal multi-input: Thermocouple, RTD Pt100, DC voltage and current signal

• PID auto-tuning control function

• Relay control output

• High precision measurement and control

• LED dual digital display (PV / SP)

• Simple button operation, full parameter setting

• Strong anti-interference, suitable for industrial environment

3. Safety Notes

• Cut off power supply before wiring, installation and maintenance.

• Do not place the controller in high temperature, humid, vibrating, corrosive gas environment.

• Separate power line and signal line wiring to avoid interference.

• Do not disassemble the internal circuit by yourself; only professional personnel can repair and set parameters.

• Avoid water splash and chemical solvent corrosion on the device.

4. Installation

1. Panel mounting type.

2. Open standard mounting hole on the control panel.

3. Insert SCP451-11 into the panel from front side.

4. Fix the fixed buckle at the rear and lock it firmly.

5. Keep the panel surface flat without obvious gap.

5. Terminal Wiring

• Power terminal: Connect AC power supply

• Sensor input terminal: Connect thermocouple / Pt100 / analog signal

• Control output terminal: Relay contact output, connect heater or external contactor

• Alarm output terminal (if equipped): For over temperature alarm and interlock

6. Front Panel Keys & Display

• PV Display: Actual measured temperature / process value

• SP Display: Set target temperature / parameter code and value

• SET Key: Enter parameter menu, confirm setting

• Up / Down Key: Adjust value, select menu item

• Function Key: Switch parameter group, exit setting mode

7. Basic Operation

Power on

Set target temperature

1. Press SET key briefly.

2. Use Up / Down key to adjust the required temperature value.

3. Press SET again to save and return to normal display.

Enter parameter setting

1. Press and hold SET key for 3 seconds to enter parameter menu.

2. Select parameter code by Up / Down key.

3. Press SET to enter value modification.

4. Adjust data by Up / Down key.

5. Press SET to save and enter next parameter.

6. Long press SET to exit parameter menu.

8. Main Parameters

• Input type: Select thermocouple K, J, E, T, R, S, B / Pt100 / 4-20mA / 0-10V

• Control mode: PID / On-Off control

• PID parameter: Proportional band, integral time, derivative time

• Alarm setting: Alarm value, hysteresis, alarm mode

• Scale range: Upper limit and lower limit of measurement

9. Fault & Error Code

• Open sensor: Display sensor break error

• Over range: Input signal exceeds measuring range

• Under range: Input signal lower than measuring range

• Hardware error: Internal circuit abnormal, need professional inspection

10. Specifications

• Model: SCP451-11

• Input: Universal TC, RTD, DC current / voltage

• Control mode: PID auto-tuning / On-Off

• Output: Relay contact output

• Display: Double LED digital tube

• Power: AC 100–240V 50/60Hz

• Working temperature: 0～50°C

• Humidity: 10%～90% RH non-condensing

• Mounting: Standard panel installation

11. Maintenance

• Clean surface with soft dry cloth only.

• Regularly check terminal wiring for looseness.

• Avoid long-term over-temperature working environment.

• Regular calibration is recommended for high precision occasions.