Kodak 9020/CINE service manual Bus

SM 2547-1 Service Manual

P-BUS

All the Models are equipped with the P-Bus feature.

The Models 4020 and 5020 has only an Input Bus, Models 7020 and 9020 and 9020/CINE an IN/OUT Bus.

The P-Bus (Presentation Bus) is a serial asynchronous data transmission interface which uses the RS 232 / V.24/ V.28 standard. This type of interface is used with Personal Computers for external communication.

figure 3-14

The purpose of the bus is to enable computer controlled projection with one or more slide projectors. Up to 16 different EKTAPRO 7020 or 9020 and 9020/CINE projectors can be addressed separately if they are connected through a daisy chain configuration. The projector addresses can be selected on the PROJECTORS ADDRESS SELECTOR SWITCH which is located above the P-Bus connectors.

The P-Bus interface configuration is initially set at:

-1 Start bit

-8 Data bit

-1 Stop bit

-9600 Baud rate

-No Parity

The signal levels must be equal to the RS232 specifications.

The signal lines are only “Transmit Data” and “Receive Data”. Bi-directional lines are not used.

The projector can be controlled by other control signals beside the P-Bus Interface. Details can be found in a special marketing publication.

The P-Bus is also used as Service Interface for the Diagnostic Software.

Kodak AG, Stuttgart 3-17 03/98