Selectron CPU 725-LTH User Manual

CPU 72x
24.05.2019 page 9
1.4.2 Power Supply
The 24 Vdc power supply of the CPU 72x is realized via the 5 pole connecting terminal
(UC and 0V). Via the extension bus the internal 5 Vdc logic supply (UL) is connected to the
extension modules.
Power Supply CPU 72x
-T/LT
-TH/LTH
Power supply UC
Nominal value
24 Vdc
36 Vdc
Limit value
16.8…30.0 Vdc
25.2…45.0 Vdc
Powerfail threshold typ.
16 Vdc
17 Vdc
Power consumption CPU without extension
modules
2.6 W
2.6 W
Max. power consumption CPU with extension
modules
11 W
11 W
Max. power supply for extension modules
5 W
5 W
Galvanic separation
UC  logic
Yes
1)
Yes
1)
UC  CAN supply
Yes
1)
Yes
1)
Logic  CAN supply at CPU 725/727
Yes
Yes
Logic  CAN1 supply at CPU 723-T
No
—
Logic  CAN2 supply at CPU 723-T
Yes
—
against ground
Yes
1)
Yes
1)
Test voltage
560 Vac, 800 Vdc
Powerfail error
Yes, if UC  Powerfail threshold,
the LED ‘UC’ goes out
1)
simple insulation
Fig.08: Wiring of power supply (UC)

Selectron CPU 725-LTH Specifications

General

Brand	Selectron
Model	CPU 725-LTH
Category	Computer Hardware
Language	English