The common features for all series are the following:
MECHANICAL.- Housed in a rugged extruded aluminium profile housing for panel mounting or free standing. Finished in anodized black colour. The frontal lens is mounted with a special rubber profile which provides the front part of the unit with an 
CONTROL SIGNALS .- Three inputs, sharing one common return. The operating mode depends on interlinking of the three control lines
CONNECTIONS.- | For output alarm are made using one   | 
  | the rear part of the unit.  | 
  | For control signals are made using one   | 
  | rear part of the unit.  | 
  | For serial data output are made using one   | 
  | the rear part of the unit.  | 
  | The recommended wire cross section is 0.5 mm2.  | 
  | For Power Supply uses a   | 
  | terminal for earth ground.  | 
  | The recommended wire cross section is 2.5 mm2.  | 
  | The fuse is located in the Power Supply socket, as well as the spare fuse.  | 
MEMORY.- | Non volatile static RAM type, to maintain the real time clock running in power down or  | 
  | in case of power failure during two years. It allows 100,000 cycles ON/OFF.  | 
  | On the run time clock the data and alarm value will be stored also for a maximum of  | 
  | 2 years.  | 
RESET.- | By remote   | 
  | Only for run time clock.  | 
4.- MODELS
4.1.- MODEL 
Run time clock : 99 minutes 59 seconds.
Real time clock or run time clock is internally DIP switch selectable. Run up or run down controlled by internal dip switch.
4.2.- MODEL LDP-1XX-C1.  Display time using the format HH : MM
Real time clock : 12 or 24 hours selectable.
Run time clock : 99 hours 59 minutes.
Real time clock or run time clock is internally DIP switch selectable.
Run up or run down controlled by internal dip switch.
4.3.- MODEL 
Run time clock : 99 hours, 59 minutes, 59 seconds.
Real time clock or run time clock is internally DIP switch selectable. Run up or run down controlled by internal dip switch.
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