Datcon DT2500 Series, Руководство по эксплуатации, Страница: 7 / 29

DT2500
20171220-V1
7
3.3. Principle of operation
Area of application
The DT2500 IS Power Supply provide IS power for devices operate in
zone 1 potentially explosive area.
The power supplies are available in seven different output voltage and
current variations (see table on the previous page). A front panel
potentiometer makes possible to adjusting the output voltages,
therefore any voltage of range the 5,8 - 24 V can be ensured. The
LED indicators show information from output voltages, and the fault
conditions.
The EEx classification of the power supplies is: II (2)G [Ex ib Gb] IIC
or II (2)G [Ex ib Gb] IIB.
You can see the detailed information on chapter
10.1. Technical
specification.
Operating principle
The connected line voltage through voltage transformers, through the
rectification and filtration come to the input of control circuit. The
control circuit generates - depending of the type – the output voltage.
This voltage goes to two independent current limiting units. These
currents limits units are ensure the Io short-current. In case of
overload, the red LED light. After the currents limit units the output
voltages come in the outputs terminals. The Uo output voltage is
limited by zener diodes.
If the supply voltage higher than 250 V safety value, the mains fuse
blow out. The thermal fuse protects the power transformer from
overheating.
Power supply
200-250 VAC; 50/60 Hz
10 VA/7 W
3.4. Adjustment
After the device connected to the power supply ready for operation.
You can find detailed information for settings on
7. Settings
chapter.