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Commercial Time Controls
  Product Range Description
  811
  841
  842
  851
  852

851



- 7 day operation
- 200 event memory
- Key protection
- Battery back-up
- Extend or crop overrides
- Volt-free contacts


The 851 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.
851

Technical data



Code No.TypeDescriptionDimensions
(mm)

851
087N657200 851Single channel, 7 day, electronic timeswitch. Single channel. Up to 200 on /off outputs per week. Plus EXTEND override and CROP override.115 wide x 228 high x 50 deep


Documentation



5 Documents Found: 1 certificates/declarations, 2 instructions, 1 sales leaflet and 1 wiring diagrams


Certificates/Declarations
 
MK8 Declaration of Conformity
DRL0047 Mk8 Range 11-07.pdf (0.0 Mb), Literature number: VCAFI212, Language: UK English, Release date: 02/11 2007
 


Instructions
 
811 and 851 Installation Instructions
3046.pdf (0.5 Mb), Literature number: VIAFW112, Language: UK English, Release date: 01/12 2005
 
811 and 851 User Instructions
3044.pdf (0.4 Mb), Literature number: VIAFX112, Language: UK English, Release date: 01/12 2005
 


Sales Leaflet
 
MK 8 Range
606.pdf (0.3 Mb), Literature number: VBAFD112, Language: UK English, Release date: 01/02 2006
 


Wiring Diagrams
 
851 Wiring Diagram
851.pdf (0.4 Mb), Literature number: VWAFJ112, Language: UK English, Release date: 07/02 2007