1 Amp (HAY-PSUINLINE1A). The HAY-PSUINLINE is a 12V DC inline power supply designed for applications requiring a reliable power source, such as CCTV systems and other electronic devices. It features a UK mains plug and a 2.1mm DC output plug facilitating easy installation and flexibility in various setups. It is available in two output current versions: 1Amp rated with a 2.4 metre long lead or 5Amp rated with a 3.6 metre long lead.. Inline power lead. 1 Amp or 5 Amp versions. UK plug and 2.1mm socket connection.