Issue link: https://www.e-digitaleditions.com/i/1192126
January/February/March 2020 I 33 Pathways • The pathways will be galvanized rigid steel conduit from the end device to one of the existing cable trays and from the tray down to the network zone enclosure. This is appropriate considering the physical environ- ment also conforms to the client stipulation for protec- tion to 30 feet AFF. • The low voltage section of the cable trays will be used to route cabling back toward the network zone enclo- sure location, since they are existing, have additional capacity, and are positioned to minimize conflict with production operations while being accessed. • This choice meets the client requirements, and it is most efficient from both material and installation labor perspectives. Components • At the camera locations, rugged outlets will need to be installed, remain dust-tight and support a shielded cable solution. M12 X-Code outlets are the appropriate choice because they offer an IP65 (often IP67) rating and connectivity for all eight cable conductors to sup- port PoE. The rigid steel conduit can be terminated at a small (6"x 6"x 4") dust-tight enclosure where the permanent link cable will be terminated in modular plug terminated link (MPTL) style. A bulkhead adapter designed to connect an RJ45 on the inside of the enclo- sure to M12 on the outside of the enclosure will also need to be installed through one of the enclosure walls (downward facing preferred). The client supplied cam- eras will have dust-tight enclosures with gland type cable entry points and internal RJ45 ports, so patch cables with M12-X male on one end and RJ45 male on the other will be required for a shielded cable. • At the control panel locations, the rigid steel conduit will connect directly to the enclosure using either a dust-tight conduit hub or by transitioning to liquid- seal flexible conduit and accompanying connectors. The control panels are dust-tight and utilize DIN style mounting rail for internal components and plastic wiring ducts for routing power and control conductors between components and terminal strips where field wiring is connected. Therefore, single port RJ45 DIN mount adapters or DIN mount patch panels will be BASE CONSIDERATIONS THAT THE PHYSICAL INFRASTRUCTURE DESIGNER NEEDS TO DETERMINE OPTICAL FIBER Metallic outer versus non-metallic (all-dielectric)? Indoor-Outdoor cable (Indoor/Outdoor (I/O) per ICEA standard for cable that can be used both indoors and outdoors)? OM3/OM4/OM5, OS1, OS1a, OS2? Connector type—LC pigtail/splice-on versus mechanical pre-polished? Topology/Redundancy? BALANCED TWISTED-PAIR Cat 5e/Cat 6/Cat 6a? Shielded/Unshielded? Indoor/Outdoor? Voltage rated insulation? Teck armored? Latency (Ether-channel)? Topology/Redundancy? WIRELESS Point to Point? Point to Multi-point? Redundancy/Mesh Technology? Nature of application that is critical to production, latency/jitter sensitivity? Mobile obstructions, such as objects/material/equip- ment/cranes? Frequencies (900MHz, 2.4GHz, 5GHz)? Other wireless networks in range (i.e., interference)?