Flexible Automation
Power supply modules
3-2
1070 072 143-101
3.1 Selecting the power supply module
The 4 power supply modules NT1, NT2, NT3 and NT24 are provided for the
internal power supply.
The selection of power supply module is made according to the configur
ation of the control. The power supply module in the basic unit is also re
sponsible for the internal power supply of all modules in the expansion
units.
To select the power supply module, some monitoring of the internal current
consumption of the modules used must be carried out.
The following table gives information on the maximum current values of the
power supply modules.
Supply voltage
Supply voltage [A]
NT1 NT2 NT3 NT24
+5 V 4 8 26 11.2
+5 V buffer voltage 0.25 1 contained in 8 4 contained in 26 3 contained in 11.2
+12 V 1.8 3 6 4.4
+12 V ISO +0.5 +1 +4.5 +1.5
-12 V ISO -0.1 -0.5 -1.5 -1.0
Fig. 3-2 Current supply of the power supply modules
NT1
The NT1 power supply module is an inexpensive model and can be used
when no system modules can be used in the control. In this case, the basic
unit can also be operated without a fan unit; see also section 2.6 Fan units
NT2
The NT2 power supply module is an inexpensive model and can be used
when only very few modules can be used in the control.
To Next Page
Loading...
