1. Introducció
This manual provides detailed instructions for the installation, operation, and maintenance of the plplaaoo GRW8-01 Temperature Control Relay. This device is designed to monitor and control temperatures in various applications, offering both heating and cooling modes. Please read this manual thoroughly before use to ensure safe and efficient operation.
2. Informació de seguretat
Observeu sempre les precaucions de seguretat següents:
- Assegureu-vos que l'alimentació estigui desconnectada abans de la instal·lació o el manteniment.
- La instal·lació només l'ha de fer personal qualificat.
- Verify correct wiring connections to prevent damage or malfunction.
- No excedeixi el vol especificattage i qualificacions actuals.
- Protegiu el dispositiu de la humitat i de les temperatures extremes fora del seu rang de funcionament.
3. Producte acabatview
The plplaaoo GRW8-01 is a digital temperature control relay designed for single-phase monitoring. It features selectable heating/cooling modes and LED indicators for operational status.
Característiques principals:
- Monitors high/low temperatures.
- Selectable heating or cooling mode.
- LED indicators for power (green) and output relay (red).
- Wide power supply compatibility: AC/DC 24V-240V, 50/60Hz.
- Adjustable temperature range: -15℃ to +45℃.
- Adjustable hysteresis value: 0.5℃ to 5℃.
- DIN rail installation (35mm).
Contingut del paquet:
- 1 x GRW8-01 Temperature Control Relay
- 1 x sonda de temperatura
- 1 x Manual d'usuari (aquest document)
4. Configuració i instal·lació
The GRW8-01 relay is designed for 35mm DIN rail installation. Follow these steps for proper setup:
4.1 Muntatge
Mount the relay onto a standard 35mm DIN rail in a suitable enclosure. Ensure adequate ventilation and protection from environmental factors.

Figura 4.1: lateral view of the GRW8-01 relay, illustrating the DIN rail mounting mechanism. The red clips at the bottom are used to secure the device to a 35mm DIN rail.
4.2 Connexions de cablejat
Refer to the wiring diagram and terminal labels for correct connections. Ensure all connections are secure and comply with local electrical codes.
- Power Supply (L-N): Connect AC/DC 24V-240V to terminals A1 and A2.
- Temperature Probe (NTC): Connect the provided temperature probe to terminals T1 and T2.
- Output Relay (SPST): Connect the controlled device to terminals 11 and 14. This is a single-pole, single-throw contact.

Figura 4.2: Detailed wiring diagram for the GRW8-01 relay. It shows connections for the power supply (A1, A2), the NTC temperature probe (T1, T2), and the output relay contacts (11, 14).

Figura 4.3: The GRW8-01 temperature control relay shown installed within an electrical panel, demonstrating typical wiring connections to terminals A1, A2, T1, T2, 11, and 14. The front panel controls for temperature and hysteresis are visible.

Figura 4.4: The NTC temperature probe included with the GRW8-01 relay. This probe is essential for accurate temperature measurement and control.
5. Instruccions de funcionament
Once installed and wired, configure the GRW8-01 relay using the front panel controls.
5.1 Encès
Apply power to the A1-A2 terminals. The green "Un" LED indicator will illuminate, indicating the device is powered.
5.2 Selecció de mode (calefacció/refrigeració)
Use the "FUNC" switch to select the desired operating mode:
- CALOR: For heating applications. The output relay will activate when the temperature falls below the set point minus hysteresis.
- GUAI: For cooling applications. The output relay will activate when the temperature rises above the set point plus hysteresis.
5.3 Configuració de la temperatura
Adjust the "Temperature" dial to set the desired temperature set point. The range is -15℃ to +45℃.
5.4 Hysteresis Setting
Adjust the "Hysteresis" dial to set the temperature difference before the relay changes state. The range is 0.5℃ to 5℃. Hysteresis prevents rapid cycling of the controlled device.

Figura 5.1: Close-up of the GRW8-01 relay's front panel, showing the "Un" (power) and "R" (relay output) LED indicators, the "FUNC" switch for heating/cooling mode, and the dials for "Temperature" and "Hysteresis" settings.
5.5 Output Relay Indication
The red "R" LED indicator illuminates when the output relay is active (contacts 11-14 are closed).
6. Manteniment
The GRW8-01 relay requires minimal maintenance. Follow these guidelines:
- Neteja: Keep the device clean and free from dust. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Inspecció: Inspeccioneu periòdicament les connexions del cablejat per comprovar si estan ben ajustades i si hi ha signes de desgast o danys.
- Medi ambient: Assegureu-vos que l'entorn de funcionament es mantingui dins dels rangs de temperatura i humitat especificats.
7. Solució De Problemes
If the GRW8-01 relay is not functioning as expected, refer to the following table:
| Problema | Causa possible | Solució |
|---|---|---|
| No power (Green "Un" LED off) | No power supply to A1-A2 terminals; incorrect voltage. | Comproveu les connexions de la font d'alimentació i el volumtage (AC/DC 24V-240V). |
| Output relay not activating (Red "R" LED off) | Temperature not within set range; incorrect mode (HEAT/COOL); faulty probe. | Verify temperature set point and hysteresis; check FUNC switch; inspect temperature probe connection (T1-T2). |
| Lectures de temperatura inexactes | Faulty temperature probe; probe not correctly positioned. | Check probe connection; ensure probe is in the correct sensing location; replace probe if damaged. |
| Relay cycles too frequently | Hysteresis value set too low. | Increase the hysteresis value using the "Hysteresis" dial. |
Si els problemes persisteixen, poseu-vos en contacte amb el servei d'atenció al client.
8. Especificacions
| Paràmetre | Valor |
|---|---|
| Funció | Monitor high/low temperature |
| Terminal de potència | LN |
| Volum d'alimentació nominaltage | CA/CC 24V-240V |
| Freqüència de potència nominal | 50/60Hz |
| Resistència d'impuls nominal Voltage | 2.5kV |
| Aïllament nominal Voltage | 250 V |
| Consum màxim d'energia | 2VA |
| Power Supply Allowable Fluctuation Range | -15%~+10% |
| Interval d'ajust de temperatura | -15 ℃ a + 45 ℃ |
| Temperature Adjustment Hysteresis Value | 0.5 ℃ a 5 ℃ |
| Mode de treball | Heating-cooling-on and off can be set |
| Indicador d'alimentació | LED verd |
| Paràmetres de sortida | 1xSPST 16A/AC1 250VAC/24VDC |
| Minimum Switching Power | 500 mW |
| Output Relay Indication | LED vermell |
| Vida mecànica | 1 x 107 |
| Electrical Life (resistive Load) | 1 x 105 |
| Temperatura de l'entorn de treball | -20 ℃ ~ + 55 ℃ |
| Storage and Transportation Environment Temperature | -35 ℃ ~ + 75 ℃ |
| Mètode d'instal·lació | Approx. 35mm / 1.4in rail installation |
| Nivell de protecció | IP20 |
| Ubicació d'instal·lació | Qualsevol |
| Grau de contaminació | 2 |
| Capacitat de cablejat | 1x2.5mm² or 2x1.5mm² 0.8Nm |
| Pes de l'article | 3.53 unces |
| Dimensions del paquet | 7.48 x 6.3 x 0.79 polzades |
9. Garantia i Suport
For warranty information or technical support, please refer to the product packaging or contact plplaaoo customer service through the retailer where the product was purchased. Please have your model number (GRW8-01) and purchase date available when contacting support.
Online resources may be available at the plplaaoo Store on Amazon.