Building Control (Field Installed)
Communication Bus, Wire, Fiber, & Wireless
Communication Bus, Wire, Fiber, & Wireless - Guide Specifications (Controls)
2.1.3
Communications Bus (When Part of a Network)
2.1.3.1
General: Wiring and Raceways:
Provide copper wiring, plenum cable, and raceways as specified in the applicable
sections of Division 16. All insulated wire to be stranded copper conductors, UL labeled
for 90C minimum service.
The Communications Bus shall be a three-conductor cable with shield. EIA Standard
RS-485 Communication’s protocol shall be employed. The communications bus shall
comply with FCC Part 15, Subpart J, Class A for bus radiated and conductive noise.
Communications Bus shall be capable of having multiple system elements connected.
Each Communications Bus shall allow for the use of modules as an interface to
secondary Buses.
Whenever the Communications Bus enters or leaves a building, the Bus shall be
provided with adequate lightning suppression devices.
The Communications Bus shall be capable of communicating through a telephone
modem to a remote building. This interface shall allow any EMS operator’s station, as
applicable, to communicate with any other remotely located, compatible, communications
bus.
2.1.3.2
Fiber Optic Cable System
A. Optical Cable:
Optical cables shall be duplex 900mm tight-buffer construction designed with armoring for
exterior applications. The armoring shall be removable type revealing cable suitable for intrabuilding environments. The sheath shall be UL Listed OFNP or OFNR in accordance with NEC
Article 770. The optical fiber shall meet the requirements of FDDI, ANSI X3T9.5 PMD for
62.5/125mm.
B. Connectors:
All optical fibers shall be field-terminated with ST type connectors. Connectors shall have ceramic
ferrules and metal bayonet latching bodies.
2.1.3.3
Wireless Communication
A. Wireless Transceivers:
Wireless Transceivers shall operate in the license-free portion of the FCC designated industrial,
scientific, and medical (“ISM”) frequency band at 2.4GHz. Wireless Transceivers shall be capable
of transmissions over up to 1,500 feet indoors through medium type construction, and line of sight
to the horizon outdoors.
B. Transceivers:
Transceivers shall be frequency hopping spread spectrum type for security purposes and shall
operate with a minimum of 417 independent, non-interfering frequencies.
C. Transceivers:
Transceivers shall be capable of supporting up to 9.6kbs full duplex.
D. Transceivers:
Transceivers shall be capable of operation in Point to Point pairs and in Multi-Point, Broadcast,
and Repeater Networks with up to 239 nodes.