Abstract: A carrying case including a base portion, a lid rotatively and removably connected to the base portion, a first and second securing unit on an edge of the base portion with the first securing unit and second securing unit being separated by a distance and each having a channel extending through their length, a third securing unit on an edge of the lid having a channel extending through the length of the third securing unit wherein the length of the third securing unit is less than the distance separating the first and second securing units, a removable pin having a knob and a threaded portion on one end wherein the pin is sized such that the pin passes through the channels in the first, second and third securing unit.

Abstract: A building automation system is provided in which a controller is connected to remote modules through a zone enclosure using RS-485 cables. Branches of modules extending from the zone enclosure are connected together by removable jumpers at the zone enclosure. Sets of branches of modules using different protocols are isolated from each other. Shorts in the RS-485 cables can be determined by disconnecting and reconnecting the branches from the network. The zone enclosure has a patch panel that contains modular RS-485 connectors. An RS-485 cable from the controller and pulled through the building along with other data cables is connected to the RS-485 connectors at the back of the patch panel. The modules are connected to the RS-485 connectors at the front of the patch panel through RS-485 cables.