Mechanical and electrical configuration
112
X20 system User's Manual 3.10
3.24.6 Example
Calculating the total internal power consumption of a BR9300 bus receiver with the following hardware configura-
tion:
Module
Bus power [W]
I/O-internal power [W]
X20DI4371
0.14
0.59
X20DI2371
0.12
0.29
X20DO4322
0.16
0.49
X20DO4322
0.16
0.49
X20BT9100
0.50
0.10
Total
1.08
1.96
Two power values have to be calculated in order to determine the entire internal power consumption of the bus
receiver.
•
Internal X2X Link power consumption of the X20BR9300
•
Internal I/O power consumption of the X20BR9300
3.24.6.1 Calculating the internal X2X Link power consumption of the X20BR9300
Bus power consumption of all modules in the X20 system
The sum of the bus power consumption from all of the modules in the X20 system is necessary in order to calculate
the internal X2X Link power consumption of the X20BR9300.
The sum for the example configuration is calculated using the following formula: The bus module of the X20BR9300
does not have to be taken into account in the calculation. The power consumption of the bus module is already
included with a factor of 0.8 (see formula below).
A power consumption of 0.13 W for each bus module must be included in the calculation for the 4 I/O modules
and the bus transmitter.
Internal X2X Link power consumption of the X20BR9300
The internal X2X Link power consumption of the X20BR9300 is calculated using the following formula. Since X2X
Link is only supplied by the X20BR9300 bus receiver, the factor is n = 1:
