The 811 is one of the models within the MK8 range of 7 day commercial and industrial controls. This range includes on/off units for boiler, lighting and process control, and pulsed output units for bellringing or siren sounding applications.
Programme entry is via a membrane keypad with audible feedback. For security it is only possible to enter or change the time, programme and extend duration with the removable key in place and turned to the setting position.
The on/off units 811, 851 and 852 feature a programmable 0 to 8 hour EXTEND or continuous override and a CROP override to Cancel the Remainder of an ON Period. The AUTO/OFF rocker switches allow outputs to be switched off.
