1. Product Overview
The Allen-Bradley TNR00305F is an industrial timing relay designed for precise control of electrical circuits based on a set time delay. This device operates at 115VAC and provides a timing range of up to 15 seconds. It is commonly used in automation, control panels, and various industrial machinery to sequence operations or provide delayed actions.
Figure 1: Front view of the TNR00305F Timing Relay, showing the adjustment dial for setting the time delay.
2. Setup and Installation
Proper installation is crucial for the safe and reliable operation of the TNR00305F timing relay. Always ensure power is disconnected before beginning any installation work.
2.1 Safety Precautions
- Disconnect all power to the circuit before installation or maintenance.
- Installation should only be performed by qualified personnel.
- Ensure the operating voltage (115VAC) matches the relay's specifications.
- Protect the device from moisture, excessive heat, and vibration.
2.2 Mounting and Wiring
The TNR00305F is designed for panel mounting or socket installation. Refer to the specific wiring diagram provided with your equipment or consult the manufacturer's official documentation for correct terminal connections.
Figure 2: Rear view of the TNR00305F Timing Relay, illustrating the pin configuration for electrical connections.
Ensure all connections are secure and properly insulated to prevent short circuits or electrical hazards. The relay typically connects to a compatible socket that provides the necessary pin configuration for power input, output contacts, and timing control.
3. Operating Instructions
The TNR00305F timing relay features an adjustable dial on its front face to set the desired time delay.
3.1 Setting the Time Delay
- Identify the timing range of the relay (e.g., 0-15 seconds).
- Rotate the black adjustment dial on the front of the relay to align the desired time value with the indicator mark. The dial is marked from 0 to 10, representing a percentage or fraction of the total timing range. For a 15-second relay, a setting of '5' would typically correspond to 7.5 seconds.
- Once the power is applied, the timing sequence will initiate according to the relay's specific function (e.g., On-Delay, Off-Delay).
Consult the specific application's control schematic to understand the exact timing function and how it integrates into the overall system.
4. Maintenance
The Allen-Bradley TNR00305F timing relay is a robust industrial component designed for long-term reliability with minimal maintenance. Regular inspection is recommended to ensure optimal performance.
4.1 General Inspection
- Periodically inspect the relay for any signs of physical damage, such as cracks, discoloration, or loose connections.
- Ensure the mounting is secure and the relay is not exposed to excessive vibration.
- Check for any accumulation of dust or debris, especially around the terminals, and clean if necessary using a dry, soft cloth.
4.2 Cleaning
If cleaning is required, ensure the power is disconnected. Use a dry, lint-free cloth to wipe the exterior of the relay. Do not use liquid cleaners or solvents, as these can damage the internal components or markings.
This device contains no user-serviceable parts. Any internal issues require replacement of the unit.
5. Troubleshooting
If the TNR00305F timing relay is not functioning as expected, consider the following common issues and troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Relay does not energize/time | No power supply; Incorrect wiring; Faulty relay. | Verify 115VAC power is present at the input terminals. Check wiring against schematic. Replace relay if power and wiring are confirmed correct. |
| Incorrect timing | Dial setting incorrect; External interference; Faulty relay. | Re-adjust the dial setting. Check for stable power supply and absence of strong electromagnetic fields. Replace relay if timing remains inaccurate. |
| Contacts not switching | Overload; Worn contacts; Faulty relay. | Ensure load current does not exceed contact rating. Replace relay. |
If troubleshooting steps do not resolve the issue, it is recommended to contact a qualified electrician or the product supplier for further assistance.
6. Specifications
The following specifications are for the Allen-Bradley TNR00305F Timing Relay:
Figure 3: Product label of the TNR00305F, detailing electrical specifications.
- Brand: Allen-Bradley
- Model: TNR00305F
- Function: Timing Relay
- Time Range: 15 Seconds
- Operating Voltage: 115 VAC
- Contact Rating:
- 10 Amps Resistive at 115 VAC
- 1/6 H.P. at 115 VAC
- 1/3 H.P. at 230 VAC
- Manufacturer: INDUSTRIAL MRO
- ASIN: B091FZPX97
7. Warranty and Support
For specific warranty information regarding the Allen-Bradley TNR00305F Timing Relay, please refer to the terms and conditions provided by the original seller or manufacturer at the time of purchase. As this item may be new surplus or remanufactured, warranty coverage can vary.
For technical support or inquiries, please contact the vendor from whom the product was purchased. Provide them with the product model number (TNR00305F) and ASIN (B091FZPX97) for efficient assistance.
Legal Disclaimer: Surplus Item - Package Condition/Type May Vary.