1. Introducció
The GEYA GRT8-S1 is an asymmetric cycle time relay designed for various industrial and home automation applications. It offers two primary time functions: cycler beginning with a pulse (ON first) and cycler beginning with a pause (OFF first). This relay features a wide time scale from 0.1 seconds to 100 days, divided into 10 time ranges, and is equipped with an LED indicator for relay status. Its ultra-small size allows for convenient 35mm DIN rail mounting.
This manual provides detailed instructions for the safe installation, configuration, and operation of your GRT8-S1 relay.
Figure 1: GEYA GRT8-S1 Asymmetric Cycle Time Relay
2. Informació de seguretat
- Always disconnect power before installation, wiring, or maintenance to prevent electric shock.
- La instal·lació ha de ser realitzada per personal qualificat d'acord amb els codis i les normatives elèctriques locals.
- Assegureu-vos del volum del relétage and current ratings match your application requirements.
- No exposeu el dispositiu a la humitat, temperatures extremes ni ambients corrosius.
- Comproveu que totes les connexions estiguin segures abans d'aplicar energia.
3. Producte acabatview
The GRT8-S1 features clearly labeled terminals and adjustment potentiometers for easy configuration. The front panel includes LED indicators for power supply and output status.
Figure 2: GRT8-S1 Component Layout and Indicators
Components clau:
- Supply Terminals (A1, A2): Per connectar la font d'alimentació.
- Function Selection (S-A1 Jumper): Determines the starting state of the cycle.
- Indicació LED: Green LED for power supply (Un), Red LED for output (R).
- T1 ON Time Adjustable Potentiometer: Sets the duration of the ON state.
- T2 OFF Time Adjustable Potentiometer: Sets the duration of the OFF state.
- Output Terminals (15, 16, 18): Single Pole Double Throw (SPDT) contacts for controlling the load.
4. Configuració
4.1 Muntatge
The GRT8-S1 is designed for 35mm DIN rail mounting. Simply clip the relay onto the DIN rail in your electrical enclosure. Ensure it is securely fastened.
4.2 Esquema de cablejat
Connect the power supply and load according to the wiring diagrams below. The GRT8-S1 is a 1SPDT (Single Pole Double Throw) relay, meaning it has one common terminal (15), one normally closed (NC) terminal (16), and one normally open (NO) terminal (18).
Figure 3: GRT8-S1 Wiring Diagram
Example Wiring for a Load:
Figura 4: Example Wiring with a Bulb
En aquest example, the bulb works for a period (T1), stops for a period (T2), and continues to cycle until the relay is powered off.
4.3 Selecció de la funció
The GRT8-S1 offers two operating modes, selected by an external jumper between terminals S and A1:
- Cycler beginning with pulse (ON first): No jumper between S and A1. The load turns ON for T1, then OFF for T2.
- Cycler beginning with pause (OFF first): Jumper connected between S and A1. The load turns OFF for T1, then ON for T2.
Figure 5: Function Selection and Timing Diagrams
4.4 Configuració de l'hora
The relay has two potentiometers for setting the ON time (T1) and OFF time (T2), each with a time range selector and a percentage knob. The time scale ranges from 0.1 seconds to 100 days.
Figure 6: How to Set Time (T1 and T2)
To set a specific time:
- Select Time Range: Use the upper knob (1 or 3) to select the desired time range (e.g., 1s-10s, 1min-10min, 1h-10h, 1d-10d).
- Adjust Percentage: Use the lower knob (2 or 4) to set the percentage within the selected time range. For example, if the range is 10 minutes and the percentage is 50%, the time will be 5 minutes.
Figure 7: Time Setting Example Càlcul
5. Funcionament
Once wired and configured, apply power to terminals A1 and A2. The green LED (Un) will illuminate, indicating the power supply is active. The red LED (R) indicates the status of the output relay.
- Cycler beginning with pulse (No S-A1 jumper): The red LED will turn ON for the set T1 duration, then turn OFF for the set T2 duration. This cycle repeats as long as power is supplied.
- Cycler beginning with pause (S-A1 jumper): The red LED will remain OFF for the set T1 duration, then turn ON for the set T2 duration. This cycle repeats as long as power is supplied.
Video 1: GEYA GRT8-S1 Product Overview and Operation Demonstration
6. Manteniment
The GEYA GRT8-S1 is designed for reliable, long-term operation with minimal maintenance. Periodically inspect the relay and its connections for any signs of damage, loose wiring, or overheating. Ensure the environment remains within the specified operating temperature and humidity ranges. No user-serviceable parts are inside the unit.
7. Solució De Problemes
- El relé no s'activa: Check the power supply to terminals A1 and A2. Ensure the green 'Un' LED is illuminated. Verify wiring connections to the load.
- Incorrect timing: Recheck the settings on the T1 and T2 potentiometers, including both the time range and percentage knobs. Ensure the selected function (pulse first or pause first) is correct for your application.
- Relay failure or erratic behavior: If the relay fails prematurely or behaves erratically, ensure the connected load's current and voltage do not exceed the relay's rated capacity, especially for inductive loads. Inductive loads (e.g., motors, solenoids) can cause high inrush currents or voltage spikes that may damage the relay if not properly managed or if the relay's specifications are exceeded. Consider using an external contactor for high inductive loads.
- No output indication: If the red 'R' LED does not illuminate when expected, check the load circuit for open connections or faults.
8. Especificacions
The following table details the technical specifications for the GEYA GRT8-S1 Asymmetric Cycle Time Relay:
Figura 8: Paràmetres tècnics
| Paràmetre | Value (GRT8-S1) |
|---|---|
| Funció | Asymmetric cycler time relay |
| Supply Terminals | A1-A2 |
| Voltage Rang | AC/DC 12-240V (50-60Hz) |
| Càrrega | AC 0.09-3VA/DC 0.05-1.7W |
| Entrada de potència | max. 6VA/1.3W |
| Supply Indication | LED verd |
| Intervals de temps | 0.1s-100 days (10 ranges) |
| Configuració de l'hora | Potenciòmetre |
| Time Deviation | 10% mechanical setting |
| Precisió de repetició | 0.2% set value stability |
| Coeficient de temperatura | 0.05%/°C, at 20°C (68°F) |
| Sortida | 1 × SPDT |
| Valoració actual | 1 × 16A (AC1) |
| Switching Voltage | 250VAC/24VDC |
| Min. Breaking Capacity DC | 500 mW |
| Indicació de sortida | LED vermell |
| Vida mecànica | 1 × 107 |
| Electrical Life (AC1) | 1 × 105 |
| Restablir l'hora | max. 200ms |
| Temperatura de funcionament | -20 °C a +55 °C (-4 °F a 131 °F) |
| Temperatura d'emmagatzematge | -35 °C a +75 °C (-22 °F a 158 °F) |
| Mounting/DIN Rail | DIN rail EN/IEC 60715 |
| Grau de Protecció | IP40 per panell frontal/terminals IP20 |
| Posició operativa | Qualsevol |
| Overvoltage Categoria | III. |
| Grau de contaminació | 2 |
| Max. Cable Size (mm²) | Solid wire max. 1x2.5 or 2x1.5 / with sleeve max. 1x2.5 (AWG 12) |
9. Garantia i Suport
GEYA products are manufactured to high-quality standards and are typically covered by a manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact GEYA customer support.
For technical assistance, troubleshooting, or product inquiries, please visit the official GEYA store or contact their customer service department. You can find more information and contact details on the GEYA Brand Store.
