Power connections

The following is a guide for wiring and installing a permanent power supply.

As the sensor is used outside, a qualified electrician should install the power cables. Please check local safety regulations.

Ensure that the termination type, cable type, and cable run of the mains power source complies with local regulations and fits the installation requirements.

The power source needs to provide the correct voltage, frequency, and current in excess of the power requirement of the system.

The power source needs fuses with ratings of 5 A or larger and a slow-blow design. Cable extensions or replacement cables should be capable of carrying current in excess of that fuse rating.

Include a two-pole isolator as close to the sensor as is possible.

The power cable needs three conductors (live, neutral, and a protective earth), normally with IEC wiring colors to match those used.

The equipment requires the connection of earth ground using the earth wire of the power connector/cable or via the earth stud on the sensor base. Ensure the earth connection at the power source is suitable for this purpose.

This equipment also requires correct connection of the live and neutral conductors — make sure these are identified and wired correctly at the power source.

Normally, fit the power source with its own or system-wide GFCI1 The ground fault circuit interrupter (GFCI) is also known as the residual-current device (RCD) in the United Kingdom..

For short term testing of the sensor, fit the power cable with a suitable plug can be fitted to the end of the power cable and the sensor plugged into a standard mains supply capable of providing 5 A at the rated voltage. If this is done, the earth wire of the sensor must be connected to a suitable protective earth point.

For DC operation, the SkyVue PRO requires a 10 to 40 VDC supply capable of 1 A at 12 VDC or 0.5 A at 24 VDC.