Hanwest's HAN-L62 controller kits are designed for 2 stage systems and are supplied complete with wall controller, power relay board & 10m interface cable. The HAN-L62 can control up to 6 motorised dampers via an optional zone relay board. Up to four controllers can be coupled together for master and slave operation. Optional remote sensors are available. The power relay boards have the facility for 3 averaging sensors. The power relay board comes fitted inside a ventilated PVC enclosure with mounting lugs for ease of installation.