1. Introduction
This manual provides essential information for the proper use and maintenance of your KERUI 3m Long 5.5x2.1mm DC Cable Extender. Please read these instructions carefully before use to ensure optimal performance and safety. This cable is designed to extend the reach of DC power connections for various devices, including CCTV security cameras and standalone sirens.
2. Safety Information
- Ensure the power source is disconnected before connecting or disconnecting the cable.
- Do not exceed the specified power capability of 5A (approximately 50W at 12V).
- Avoid bending or kinking the cable sharply, as this may damage the internal conductors.
- Keep the cable away from water, excessive heat, and direct sunlight.
- Do not attempt to modify or repair the cable. Contact qualified personnel if damage occurs.
3. Product Overview
The KERUI DC Cable Extender is a 3-meter (9.84 feet) long cable designed to extend the reach of DC power connections. It features a male plug on one end and a female jack on the other, both with standard 5.5mm outer diameter and 2.1mm inner diameter specifications.
Figure 3.1: General view of the KERUI 3m DC Cable Extender. The cable is black, coiled, and features a male plug on one end and a female jack on the other.
3.1. Male Plug
The male plug connects to the power input of your device or another female jack for extension. It has an outer diameter of 5.5mm and an inner diameter of 2.1mm.
Figure 3.2: Close-up of the male DC power plug, indicating an outer diameter of 5.5mm and an inner diameter of 2.1mm.
3.2. Female Jack
The female jack connects to a power adapter's male plug or another male plug for further extension. It also features an outer diameter of 5.5mm and an inner diameter of 2.1mm.
Figure 3.3: Close-up of the female DC power jack, indicating an outer diameter of 5.5mm and an inner diameter of 2.1mm.
4. Specifications
| Cable Type | Extension Cable |
| Connector Type | 5.5x2.1mm DC Male to Female |
| Outer Diameter | 5.5mm |
| Inner Diameter | 2.1mm |
| Cable Length | 3 meters (9.84 feet) |
| Voltage Compatibility | 0-36V DC |
| Current Capability | Up to 5A |
| Conductor Material | Tinned Copper |
| Insulation Material | PVC |
| Color | Black |
| Compatibility | KERUI Standalone Siren Alarm System and its power adapter, CCTV Equipment, Car DC power supply. |
5. Setup and Installation
The KERUI DC Cable Extender is designed for simple plug-and-play installation.
- Identify Connectors: Locate the male plug on your power adapter or device and the female jack on the device requiring power.
- Connect the Extender:
- Insert the male plug of your power adapter into the female jack of the KERUI extender cable.
- Insert the male plug of the KERUI extender cable into the female power input jack of your device (e.g., CCTV camera, siren).
- Secure Connections: Ensure all connections are firm and fully seated to prevent power interruptions.
5.1. Cascading Multiple Cables
For applications requiring longer distances, two or more 3m KERUI extension cables can be cascaded (connected end-to-end) to achieve lengths of 6m or more. Ensure that the total current draw does not exceed the cable's 5A capability.
Figure 5.1: Illustration of two KERUI DC extension cables connected in series to achieve a longer reach. The yellow circle highlights the connection point between the two cables.
5.2. Compatibility Example
This cable is compatible with devices that use a 5.5x2.1mm DC power input, such as the KERUI Standalone Siren Alarm System and its corresponding power adapter.
Figure 5.2: Example setup showing the KERUI DC Cable Extender connecting a power adapter to a KERUI Standalone Siren Alarm System. The power adapter and siren are not included with the cable.
6. Operation
Once the KERUI DC Cable Extender is properly connected between your power adapter and device, simply power on your device as usual. The cable acts as a passive extension and does not require any additional operational steps.
7. Maintenance
- Cleaning: Wipe the cable with a dry, soft cloth if it becomes dusty. Do not use liquid cleaners.
- Storage: When not in use, coil the cable loosely and store it in a cool, dry place away from direct sunlight and extreme temperatures.
- Inspection: Periodically inspect the cable and connectors for any signs of wear, cuts, or damage. Discontinue use if damage is observed.
8. Troubleshooting
8.1. No Power to Device
- Check Connections: Ensure both ends of the extension cable are securely connected to the power adapter and the device.
- Verify Power Adapter: Confirm that the original power adapter is functioning correctly by testing it directly with the device (if possible).
- Check Device: Ensure the device itself is operational.
- Inspect Cable: Look for any visible damage to the cable (cuts, kinks, exposed wires). If damaged, replace the cable.
- Current Draw: If using multiple cascaded cables or a high-power device, ensure the total current draw does not exceed the cable's 5A rating.
9. Warranty and Support
For warranty information or technical support regarding your KERUI 3m Long 5.5x2.1mm DC Cable Extender, please refer to the product packaging or contact KERUI customer service through their official channels. Keep your purchase receipt for warranty claims.
