BC Time Recorder Simplex 100 Průvodce řešením problémů stáhnout pdf (Strana 8)

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The Master Controller PCB assembly supervises panel operations and controls

the front panel user interface. The Master Controller communicates with panel

PCB subassemblies via a +28V signal level communications interface.

Peripheral PCB assemblies are optically coupled to this communications

interface.

Based upon the information in the configuration flash chip (U8) the Master

Controller communicates with peripheral interface cards and directs system

monitor point supervision and signal circuit control. The Master Controller +5V

and +28V A-tap power originates on the Power I/O Interface and is daisy

chained through the Standard Slave card.

The Master Controller:

• Includes main 80196 microprocessor and memory

• Processes data from all other 4020 sub-assemblies

• Controls operator keyboard, piezo alarm and display interface

• Provides a programmer interface for downloading configuration changes

• Includes city circuit interface and contains a dry contact trouble circuit

• Contains communications circuitry to Slave cards and LCD Annunciators

Continued on next page

4020 Master Controller

Description

Master Controller Functions

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BC Time Recorder Simplex 100 Průvodce řešením problémů Strana 8