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Describes the primary use of the time relay for controlling motor rotation.
Lists key operational characteristics and capabilities of the relay.
Explains the naming convention and specific model details.
Illustrates the electrical connections for the time relay and motor control.
Details the procedure for quickly setting delay time parameters using buttons.
Explains how to enter and modify the relay's functional delay settings.
The GEYA GRT8-FR is a forward and reverse control time relay designed to manage the rotational direction of motors. This device offers precise control over motor operation by allowing users to individually set the forward rotation time, a stop time, and the reverse rotation time. This functionality is crucial in applications where motors need to alternate their direction of movement with specific delays in between.
One of the key features of the GRT8-FR is its ability to provide a forced stop. This means that at any point during operation, the motor's forward or reverse rotation can be immediately halted by pressing a designated button. This safety and control feature is vital for preventing damage or ensuring immediate cessation of movement when necessary. The relay boasts an ultra-wide delay range, allowing for settings from a mere 0.1 seconds up to an extensive 99 days. This versatility makes it suitable for a broad spectrum of applications, from rapid, repetitive tasks to long-term, infrequent operations.
The device provides clear visual feedback on its operational status through an integrated LED indicator. This allows users to quickly ascertain whether the relay is active and in what state it is operating. For installation, the GRT8-FR is designed as a 1-module unit, making it compact and suitable for mounting on a DIN rail, which is a standard method for organizing and securing electrical components in control cabinets.
Setting the delay times is intuitive. The device features a digital display that shows the current time setting. Users can short-press a "Set" button to enter the delay time setting mode for forward rotation (t1), stop time (t2), and reverse rotation (t3). Within each setting, short presses of the "Set" button adjust the parameter value incrementally. For faster adjustments, a long press of the "Set" button enables rapid value changes. If the value exceeds 99, it will loop back to 0, providing a continuous adjustment range. If no operation key is pressed within 60 seconds, the device automatically exits the setting mode, saving the current configuration.
Beyond basic time settings, the GRT8-FR also allows for the configuration of the time base for each delay. By pressing and holding the "Set" button for 3 seconds, users can enter a function setting mode. Here, they can define whether the delay times (t1, t2, t3) are measured in 0.1 days (0.1D), 0.1 hours (0.1H), 0.1 minutes (0.1M), or 0.1 seconds (0.1S). This granular control over the time base further enhances the relay's adaptability to diverse application requirements. Additionally, within this function setting mode, users can choose the timing display mode, opting for either positive timing or a countdown display. Similar to the delay time settings, if there is no key operation within 60 seconds, the device will automatically exit the function setting mode. To manually exit and save settings, users can press and hold the "Set" button for 3 seconds.
In terms of operation, once the relay is energized, the output contacts 15-18 close, initiating the motor's forward rotation. After the programmed forward rotation time (t1) elapses, these contacts open, stopping the motor. Following a programmed stop time (t2), contacts 25-28 close, causing the motor to reverse its rotation. After the programmed reverse rotation time (t3) elapses, contacts 25-28 open, stopping the motor. This sequence then repeats, creating a continuous cycle of forward rotation, stop, reverse rotation, and stop. The forced stop function, activated by a switch on A1-S, immediately halts the motor and pauses the ongoing delay cycle, providing an override capability for critical situations.
For maintenance and safety, it is crucial that the GRT8-FR is installed by qualified electricians. All electrical connections must adhere to appropriate safety standards to ensure reliable and safe operation. When the device reaches the end of its service life, all electrical waste must be disposed of in compliance with current WEEE regulations, emphasizing environmental responsibility. The product's design, with its compact dimensions and DIN rail mounting capability, facilitates straightforward integration into existing control systems and simplifies any future maintenance or replacement procedures.
General| Time Range | 0.1s - 10 days |
|---|---|
| Mounting | DIN Rail |
| Contact Rating | 16A/250V AC |
| Shock Resistance | 10G |
| Type | Time Relay |
| Functions | Time relay |
| Output | 1 SPDT |
| Contact Form | SPDT |
| Operate Time | ≤ 100 ms |
| Electrical Life | 100, 000 cycles |
| Mechanical Life | 10, 000, 000 cycles |
| Insulation Resistance | 100MΩ min |
| Ambient Temperature | -20°C to +55°C |
| Vibration Resistance | 10Hz to 55Hz |
