User Manual

Technical Manual for Master Terminals of the Series IF 152x
Page 3
Functional Units
The master terminal is equipped with the following functional units:
• Controller Unit (master unit) consisting of the following hardware assembly units: MPU board with
CPU IC 68EN302, D-RAM, C-RAM, Flash-RAM, I/O interfaces and an interface to the data entry
unit.
• Recording Unit (terminal unit) CPU IC 68 HC 12, card reader, display and interface to the
controller unit.
Controller Unit
The controller unit has the following tasks:
• Control of the data traffic between the host computer and the internal data entry.
• Switchover to mode.
• Maintenance of operation, e.g., if the connection to the host computer is interrupted or if the host
computer is switched off.
• Triggering of output relays when bookings are carried out or other conditions specified in the host
program are fulfilled.
• Management of booking-authorized employee records.
• Management of day and week programs.
• Acknowledgement of bookings recorded in offline mode.
• Storage of all bookings and events including information on the time and the location.
• Triggering of output relays.
Data Entry Unit
The data entry unit has the following tasks:
• Reading card data and transferring it to the controller unit.
• Recording events such as keypad entries and transferring them to the controller unit.
• Indicating booking acknowledgements from the host computer or the controller unit on the display.