Motorola DIMETRA MTS 2, Installation, Configuration And Basic Service Manual

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Site Controller - CAN Bus Chapter 8: Site Controller
Site Controller - CAN Bus
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The purpose of the CAN Bus is to make a common communication bus between RFDS equipment, PSU and
the Site Controller. The CAN Bus connects to the Site Controller, PSU, DPM and ATCC. The modules on
the CAN Bus are assigned an address for the CAN Bus. Each node also needs to be assigned a functionality
in MTS when there are more than one modules of the same type. Mapping between track number, CAN
ID and function relies on the fact that the unique track number is available from each unit.
At initialization of the MTS the Site Controller is con
fi
gured with a relation between track number and the
function of the node. This is done initially in a factory, but it is also possible to modify this in a service situation.
If a node is removed or is defective the Site Controller will know the track number of a FRU which is not
responding and therefore it can make a proper service report which tells exactly what FRU to replace. When
the service is carried out the track number of the defective FRU is replaced with the new track number
in the mapping list. Thus, the new track number is mapped to the function of replaced FRU.
Figure 8-6 Site Controller - CAN Bus
Table 8-6 Site Controller - CAN Bus Functionality
Unit Function
PSU Monitoring:
•
PSU temperature: -30 °C to +100 °C, tolerance: 2 °C.
•
Battery current: -20 A to +10 A, tolerance: 1%.
•
Battery voltage: 30 V to 60 V, tolerance: 1%.
•
Battery temperature: -30 °C to +100 °C, tolerance: 2 °C.
•
7 V output voltage: 0 V to 10 V, tolerance: 2%.
•
7 V output current: 0 A to 10 A, tolerance: 2%.
•
28.5 V output voltage: 0 V to 30 V, tolerance: 2%.
•
28.5 V output current: 0 A to 10 A, tolerance: 2%.
•
PSU output power: 0 W to 1100 W, tolerance: 2%.
•
Fan output voltage: 0 V to 30 V, tolerance: 2%.
8-10
6802800U74-N September 2009