The AIS240A-35 is a multi-purpose switching unit, consisting of six, four-pole relays for a total of 24-poles of switching capabilities. The relays are arranged in a group of four (16-poles) and two single relays (4-poles each). The relays can be activated by either a ground or 28VDC, maximizing installation flexibility. As with the whole family of switching units, the AIS240A-35 uses gold plated dry contacts that are sealed in nitrogen filled cases.