Editing Radio control (section)

==Industrial radio remote control==
Today radio control is used in industry for such devices as overhead [[Crane (machine)|crane]]s and switchyard [[locomotive]]s. Radio-controlled [[teleoperators]] are used for such purposes as inspections, and special vehicles for disarming of [[bomb]]s. Some remotely controlled devices are loosely called [[robot]]s, but are more properly categorized as teleoperators since they do not operate autonomously, but only under control of a human operator.

An industrial radio remote control can either be operated by a person, or by a computer control system in a [[machine to machine]] (M2M) mode. For example, an automated warehouse may use a radio-controlled crane that is operated by a computer to retrieve a particular item. Industrial radio controls for some applications, such as lifting machinery, are required to be of a fail-safe design in many jurisdictions.<ref>{{cite web|last=Autec srl|title=Radio Remote Control Safety|url=http://www.industryiq.com.au/index_htm_files/SafetyPaper2011.pdf|access-date=18 November 2013|archive-url=https://web.archive.org/web/20150310154158/http://industryiq.com.au/index_htm_files/SafetyPaper2011.pdf|archive-date=2015-03-10|url-status=live}}</ref>

Industrial remote controls work differently from most consumer products. When the receiver receives the radio signal which the transmitter sent, it checks it so that it is the correct frequency and that any security codes match. Once the verification is complete, the receiver sends an instruction to a [[relay]] which is activated. The relay activates a function in the application corresponding to the transmitters button. This could be to engage an electrical directional motor in an [[overhead crane]].
In a receiver there are usually several relays, and in something as complex as an overhead crane, perhaps up to twelve or more relays are required to control all directions. In a receiver which opens a gate, two relays are often sufficient.<ref>{{cite web|last=Tele Radio AB|title=What is industrial remote control|url=http://www.tele-radio.com/it/prodotti/what-is-industrial-remote-control/|access-date=14 November 2014|archive-url=https://web.archive.org/web/20141022021925/http://www.tele-radio.com/it/prodotti/what-is-industrial-remote-control/|archive-date=2014-10-22|url-status=live}}</ref>

Industrial remote controls are getting more and higher safety requirements. For example: a remote control may not lose the safety functionality in case of malfunction.<ref>{{Cite news|url=https://remotecontrol.help/explanation/redundant-circuits|title=Redundant circuits {{!}} Industrial remote controls|date=2016-05-03|work=Industrial remote controls|access-date=2017-06-12|language=en-US|archive-url=https://web.archive.org/web/20171227063434/https://remotecontrol.help/explanation/redundant-circuits|archive-date=2017-12-27|url-status=live}}</ref> This can be avoided by using redundant relays with forced contacts.