What's the difference between a Control Panel and a Keypad ?

Using the correct terminology is important in gaining a basic understanding of your alarm system and becoming an educated user. Understanding the difference between the control panel and the keypad is necessary for both utilizing the forums search feature and asking effective questions.

A control panel, or control unit, or simply control, is the circuitry enclosed inside the metal enclosure, or "can" installed in a premises. Sometimes external devices wired in close proximity that also enable operation are grouped into this category.

Peripheral devices, including protective loops, and items such as wireless receivers, printers, output devices, as well as end user devices are not considered to be a "control".

A keypad, keyswitch, or with some newer equipment, AUI, touch screen, or proximity readers, are all peripheral devices wired to a control. They have no more functionality other than allowing you to enter and disarm your alarm system, as well as possibly initiate a panic alarm. Keep in mind, when referring to your system; a keypad model number may be of little help to identify your system, other than manufacturer.

There are also exceptions to this rule, which are of interest. Some manufacturers make integrated keypad/control units, such as the Simon and Lynx panels, where the keypad is the control unit as well. There are also older, obsolete hardwired panels with the similar design characteristics.