First Virtual Communications Voyager 3000 - Manual (Page 36)

Voyager 3000 User Guide
3-2
System Configurations
Single Shelf configuration
Figure 3-1 shows how a single shelf Voyager 3000 system is configured with an EMU. The
system is set up with a device ID of 0 ensuring that it functions as a master device.
Dual shelf configuration
In a dual shelf configuration the Host connects to the I
2
C Master via RS232 serial link. Data
from the second EMU is requested via the I
2
C bus and is passed to the Host via the RS232
link. The I
2
C Master has sufficient memory to store global system information and its own
status information, the slave will store its own status information. An unique I
2
C address is
assigned to each EMU with the address 0 reserved for the master. The EMU currently has
provision to support up to eight shelves.
Figure 3-1 Single shelf EMU configuration
Figure 3-2 Dual shelf EMU configuration