Wireless BAS: Factors Facility Managers Should Consider

The Pros and Cons(iderations) of Wireless

PROS:

• Most building management systems (BMS) now afford integration with wireless solutions. Those that are not "native" to a certain technology can be translated with gateways that are readily available and affordable.
• Wireless devices allow BMS devices access to challenging and hazardous spaces, including historic/renovation spaces where cables cannot be used.
• Because there is no need to re-route cabling, there is flexibility in design and facility re-purposes.
• In deployment, wireless solutions are often less expensive than hardwired alternatives, particularly when the cost of conduit and copper are factored in.
• Wireless systems are electrically isolated, making them immune to lightning or other electrical damage.
• When properly configured, wireless systems are more secure than a wired equivalent, both in terms of data security and protection from physical damage to infrastructures/cabling.

CONS(IDERATIONS):

• Wireless solutions require frequency planning coordination and potential IT coordination in design and integration.
• The bandwidth of a wireless system is limited when compared to wired.
• All wireless systems are subject to random interference, with no protection from future encroachment due to an unregulated spectrum.
• Wireless should never be deployed as part of a life-safety system.
• Most require a consumable power source (batteries) which requires maintenance (at a cost) or line power, which defeats the benefit of using a wireless device. If you can get power to a location, you can generally get a signal wire there.
• Not all spaces are accessible or are shielded from radio frequency transmission, which can come from numerous and unexpected sources.
• Many sensitive spaces and government facilities do not allow RF radiation of any kind.

— by Josh Thompson