Mechanical and electrical configuration
X20 system User's Manual 3.10
107
Information about power consumption
The power consumption of individual modules can be found on the respective technical data sheet. Information
about power consumption can be found in the technical data under "General information - Power consumption".
•
The value in the "Internal l/O" row refers to the internal power requirements of the I/O module covered by
the 24 VDC I/O supply.
•
The value specified in the "Bus" row refers to the X2X Link power balance.
These rows can be used to quickly and easily create a power balance for a certain hardware configuration. The
power consumption values of individual modules should then be subtracted from the power provided by the power
supply module. The sum is not permitted to be less than zero.
Information:
For a calculation example, see 3.23.1 "Example 1" and 3.23.2 "Example 2".
Embedded parameter chip
On modules with 0.01 W power requirements, it is only possible to read the embedded parameter chip if the I/
O supply is also active. Information about the embedded parameter chip can be found in the 2.12 "Embedded
3.23.1 Example 1
Calculating the power requirements for the bus and 24 VDC I/O supply with the following hardware configuration:
Module
Bus power [W]
I/O-internal power [W]
I/O-external power [W]
Sensor/Actuator supply [W]
1)
X20DI4371
0.14
0.59
-
12.00
X20DI2371
0.12
0.29
-
12.00
X20DO4322
0.16
0.49
48.00
2)
12.00
X20DO4322
0.16
0.49
48.00
2)
12.00
X20BT9100
0.50
0.10
-
-
Subtotal
1.96
96.00
48.00
Total
1.08
145.96
(=1.96 + 96.00 + 48.00)
1)
Rated power at 24 VDC and 0.5 A.
2)
Rated power at 24 VDC and 100% simultaneity.
The total power to be supplied by the 24 VDC I/O power supply is 145.86 W. One power supply module is already
integrated in the X20BR9300 bus receiver. The power comparison indicates that the power provided by the power
supply module is sufficient.
Bus power [W]
Power 24 VDC I/O supply [W]
X20BR9300
+7.00
+240.00
1)
Power requirements of I/O modules
-1.08
-145.96
Power requirements of all bus modules
-0.78
-
Remaining power
+5.14
+94.04
1)
Rated power at 24 VDC and 10 A.
3.23.2 Example 2
The I/O modules are divided into 3 potential groups in this example:
Potential group 1
Potential group 2
Potential group 3
Digital input modules
Digital output modules
Analog input modules and temperature modules
Calculating the power requirements for the bus and 24 VDC I/O supply per potential group with the following
hardware configuration:
Potential group 1
Module
Bus power [W]
I/O-internal power [W]
I/O-external power [W]
Sensor/Actuator supply [W]
1)
X20DI6371
0.15
0.88
-
-
X20DI6371
0.15
0.88
-
-
X20DI2377
0.15
0.82
-
12.00
Subtotal
2.58
-
12.00
Total
0.45
14.58
(= 2.58 + 12.00)
1)
Rated power at 24 VDC and 0.5 A.
