# CEM

Control Electronics Module. A term for the ETC Sensor (and other manufacturers') dimmer's "brain." The module on a dimmer pack or rack where various parameters are set. This will always include the starting DMX address, and may include features such as voltage regulation, dimmer curves, implementation of secondary DMX or analog signals, etc.

Prior to the Sensor's introduction in 1992, this item was usually referred to as the "control card" or "control module."

Strand Lighting calls the item a "plug-in processor" and as shown above, contains DMX jacks, LCD display, and dimmer "test" switches. (The CD-80 dimmer line has been in existence since 1979, and thus is the longest-running "modern" dimmer.)

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