Nemtek Energizer - Merlin 4J Incl Keypad | E-MER4I

The Nemtek Merlin 4J Energizer with Keypad (E‑MER4I) is a reliable single‑zone electric fence energizer designed for residential and light commercial perimeter security, delivering up to 4 Joule class output (3.7 J at 500 Ω) for effective fence deterrence. It is supplied including a wired keypad, allowing convenient remote control and programming of the energizer from inside the premises, with support for up to four keypads installed at different access points. The unit features built‑in fence, earth, and tamper alarm monitoring, a gate input with optional gate chime, and connectivity for armed response radios or GSM modules to integrate into monitored security systems. Designed for durability and safety, the Merlin 4J includes lightning and power‑surge protection, intelligent power‑saving technology, and adjustable fence voltage and alarm outputs configurable via the keypad. Powered by 240 V mains with a built‑in 7 Ah battery backup providing up to 24 hours standby, and offering up to 8 kV open‑circuit voltage, the E‑MER4I is ideal for homes, small businesses, and perimeter installations requiring secure, user‑friendly fence control.