All Categories > Electric Vent Duct Heaters > System 350 Temp Control Modules > Item # A350 All CategoriesAll Categories Electric Vent Duct HeatersElectric Vent Duct Heaters System 350 Temp Control ModulesSystem 350 Temp Control Modules Item # A350 Item # A350, A350A Series On/Off Temperature Control A350A350A Series On/Off Temperature Control Request Information Email This Page Download PDF Download PDF Printable Page /Asset/a1110.jpg /Asset/a1110.jpg Close Window The A350A Series are On/Off temperature controls with a SPDT relay output and LED indication. These controls are used in conjunction with the A99B Series (PTC silicon) Temperature Sensors. Unit of Measure Imperial Metric Both Features N/A Field selectable heat/cool modeAdjustable setpoint and differentialSurface or DIN rail mountingLED indication of relay status5-pin connectors eliminate wiring between modules