1. Introducció
The CERTEON REX-C700 is a high-precision digital PID temperature controller designed for industrial applications requiring stable and accurate temperature management. It features a dual-color digital tube display, intelligent stability, and over-temperature protection. This manual provides essential information for the safe and effective installation, operation, and maintenance of your REX-C700 controller.
Figure 1: REX-C700 Digital PID Temperature Controller Overview
2. Informació de seguretat
- Desconnecteu sempre l'alimentació abans de la instal·lació o el manteniment per evitar descàrregues elèctriques.
- Assegureu-vos de posar a terra correctament per evitar riscos elèctrics.
- Do not operate the device in environments exceeding specified temperature and humidity ranges, or where corrosive gases or strong electromagnetic radiation are present.
- Només personal qualificat ha de realitzar la instal·lació i el cablejat.
- Comproveu que totes les connexions estiguin segures abans d'aplicar energia.
3. Producte acabatview
3.1. Panel Analysis
The REX-C700 features a clear dual-color digital tube display and intuitive control buttons for easy operation and monitoring.
Figure 2: Front Panel Layout and Indicators
- PV (Measured Value / Mode Display Value): Displays the current process value or parameter codes during setup.
- SV (Set Value / Mode Content Display): Displays the target set value or parameter settings.
- ALM1 Indicator: Illuminates when Alarm 1 is active.
- OUT1 Indicator: Illuminates when Output 1 is active.
- ALM2 Indicator: Illuminates when Alarm 2 is active.
- AT (PID Auto-tuning Indicator): Illuminates during the auto-tuning process.
- SET/Mode Key: Used to enter setup modes and confirm settings.
- Tecla Majúscules (<): Used to move the cursor during parameter adjustment.
- Decrease Key (v): Used to decrease numerical values or navigate options.
- Increase Key (^): Used to increase numerical values or navigate options.
3.2. Característiques clau
- High Control Precision: Utilizes PID fuzzy control for accurate temperature regulation.
- Estructura compacta: Designed for efficient space utilization.
- Anti-interferències: Industrial-grade design with surge, radiation, electrostatic discharge, and lightning protection.
- Llarga vida útil: Enhanced by a stable power supply with a copper transformer.
- Automatic Protection Function: Built-in mechanisms for reliable operation.
- Mètodes d'entrada múltiples: Supports K, E, J, S, PT100, CU50 sensor types.
- Opcions de sortida: Available with Relay or SSR (Solid State Relay) outputs.
Figure 3: Internal Components and Terminal Quality
4. Especificacions
| Paràmetre | Especificació |
|---|---|
| Model | REX-C700 |
| Mida del panell | 72x72mm |
| Retall de muntatge | 68x68mm |
| Embedded Depth | 100 mm |
| Longitud total | 112 mm |
| Pes | 0.240 kg |
| Interval de temperatura | 0–1200°C (Universal Input) / 0-999°C (Default K-type) |
| Voltage | 220V~±10% 50Hz (Also available in 100-240VAC, 24VDC) |
| Consum d'energia | 4W |
| Mètode de control | PID fuzzy control |
| Rang d'alarma | Full range adjustable |
| Mètode de connexió | Connexió de terminal |
| Entorn de funcionament | 0~50°C, 35–85% RH, no corrosion or EM radiation |
| Precisió | ±0.1%FS±1 digit or ±0.5%FS±1 digit |
| Opcions de sortida | Relay, SSR (Solid State Relay) (optional) |
| Opcions d'entrada | K/E/J/S/PT100/CU50 (selectable) |
Note: Some specifications may vary based on specific model configurations. Contact support for detailed information on custom requirements.
5. Instal·lació
5.1. Muntatge
The REX-C700 is designed for panel mounting. Ensure the panel cutout dimensions are accurate for a secure fit.
- Mida del panell: 72x72mm
- Retall de muntatge: 68x68mm
- Embedded Depth: 100 mm
Figure 4: REX-C700 Dimensions and Terminal Layout
5.2. Cablatge
Refer to the wiring diagram provided on the side of the unit and in Figure 4. Ensure all connections are made correctly and securely. Incorrect wiring can damage the unit or lead to unsafe operation.
- Font d'alimentació: Connect to terminals 1 and 2 (220V AC) or appropriate DC terminals if using a 24VDC model.
- Sensor d'entrada: Connect your temperature sensor (K-type, PT100, etc.) to the designated input terminals (e.g., 9, 10, 11 for K-type). The controller supports multiple input types as shown in Figure 5.
- Sortida: Connect your control device (e.g., SSR, relay) to the output terminals (e.g., 4 and 5 for SSR output).
- Sortides d'alarma: Connect alarm devices to the alarm output terminals (e.g., 6 and 7 for ALM1, 8 and 9 for ALM2).
Figure 5: Supported Input Sensor Types
Important: This controller does not measure temperature directly; it requires an external sensor (thermocouple or RTD) appropriate for your application. The universal input version supports up to 1200°C, while the default K-type input supports up to 999°C.
6. Funcionament
6.1. Funcionament bàsic
- Encès: After ensuring all wiring is correct, apply power to the controller. The display will light up, showing the current measured value (PV) and the set value (SV).
- Setting the Target Temperature (SV):
- Premeu el botó SET key once to enter the set value adjustment mode. The SV display will flash.
- Utilitza el ^ (Augmentar) i v (Decrease) keys to adjust the target temperature.
- Utilitza el < (Shift) key to move the cursor for faster adjustment of individual digits.
- Premeu el botó SET key again to confirm the new set value and exit the adjustment mode.
6.2. PID Auto-tuning
The auto-tuning function helps the controller automatically calculate optimal PID parameters for your specific heating system, ensuring stable and precise temperature control.
- Ensure the system is at a stable temperature or at room temperature.
- Manteniu premut el botó SET key for a few seconds until the parameter menu appears.
- Navegueu pels paràmetres utilitzant el SET key until you find the auto-tuning parameter (often labeled "AT" or similar).
- Change the value of the auto-tuning parameter to "1" (or "ON") using the ^ or v claus.
- Premeu SET to confirm. The AT indicator will light up, and the controller will begin the auto-tuning process.
- The system will cycle through heating and cooling to determine the optimal parameters. This process may take some time.
- Once auto-tuning is complete, the AT indicator will turn off, and the controller will operate with the newly calculated PID parameters.
Figure 6: Intelligent Auto-tuning Principle
7. Manteniment
- Neteja: Wipe the display and panel with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Condicions ambientals: Ensure the operating environment remains within specified ranges (0~50°C, 35–85% RH, no corrosive gases or strong EM radiation).
- Comprovacions de connexió: Periodically inspect wiring connections for looseness or corrosion.
- Integritat del sensor: Ensure the external temperature sensor is clean and undamaged for accurate readings.
8. Solució De Problemes
- Sense pantalla/alimentació:
- Comproveu les connexions de la font d'alimentació i el volumtage.
- Ensure the power switch (if external) is ON.
- Lectura de temperatura inexacta (PV):
- Verify the external sensor is correctly connected and not damaged.
- Ensure the sensor type configured in the controller matches the actual sensor used.
- Check for environmental interference (e.g., strong electromagnetic fields).
- Temperature Not Reaching Set Value (SV) or Unstable:
- Confirm the output wiring to the heating/cooling element is correct and the element is functioning.
- Perform PID auto-tuning to optimize control parameters for your system.
- Check if the control output indicator (OUT1) is active when expected.
- Alarm Not Functioning:
- Verify alarm settings (e.g., high/low limit, deviation).
- Check wiring to the alarm device.
9. Consells d'usuari
- Selecció del sensor: Always choose an external temperature sensor (thermocouple or RTD) that is appropriate for your specific temperature range and application. The controller itself does not measure temperature directly.
- Personalització: If your application requires specific panel sizes, input types, or output configurations beyond the standard REX-C700 (72x72mm, K-type input, Relay/SSR output), contact the manufacturer for customized solutions. Other models like REX-C100 (48x48mm), REX-C400 (96x48mm), and REX-C900 (96x96mm) are also available.
- Configuració inicial: For best performance, always perform PID auto-tuning after initial installation or significant changes to your heating/cooling system. This optimizes the controller's response.
10. Garantia i Suport
This product is manufactured under strict quality control standards. For warranty information, technical support, or inquiries regarding custom configurations, please contact CERTEON customer service or your local distributor.
For technical consultations or bulk orders, you may contact:
- Correu electrònic: celiachen008@gmail.com
- WhatsApp: +86-19542723588
