DBX ZC4 Wall Mounted Contact Closure Input Zone ControllerThe ZC 4 from dbx provides programmable program selection for DriveRack 260 and 220i devices via contact closures. It also provides programmable source selection, program selection, scene selection, or page assignment for ZonePro devices. The ZC 4 has two RJ 45 jacks and a 6 pin Phoenix terminal for device connection.