An access door condition sensing system is provided for skid-steer equipment where a door open condition is intended to disable either or both travel or implement hydraulic lifting arms commonly used for lifting a loader bucket so as to diminish the potential for damage to an open door or injury to an operator or bystander opening the door. The influence of a circuit for protecting against output load abnormalities on RF characteristics is suppressed. Conveyor elements convey the printed products on the first saddles in the axial direction along the firsts rests. A PANA client may use an unspecified IP address as a source address for authentication.