
5-4 VersaPoint™ I/O System Profibus-DP NIU User’s Manual – August 2005
GFK-1911B
5
The Main Circuit: U
M
The main circuit with the main power U
M
starts at the NIU or a power terminal.
NIU
Power Terminal
Segment Terminal
U
M
is fed through all subsequent modules until it reaches the next power terminal.
A new circuit that is electrically isolated from the previous one begins at the next
power terminal.
Multiple power terminals can be used within one station.
Function of U
M
Several independent segments can be created within the
main circuit. The main circuit provides the main power for
these segments. For example, a separate supply for the
actuators can be provided in this way.
Voltage of U
M
The voltage in this circuit must not exceed 250VAC.
Current carrying
capacity of U
M
The current carrying capacity is 8A, maximum (total current
with the segment circuit). If the limit value of the voltage
jumpers U
M
and U
S
is reached (total current of U
S
and U
M
), a
new power terminal must be used.
Generation of U
M
For many applications, the capacity of the U
M
supply integrated into the Profibus
NIU is sufficient to power the station. If necessary, U
M
can also be supplied via a
power terminal. A power terminal must be used if:
1. Different voltage ranges (e.g., 120 V) are needed
2. Electrical isolation is required.
3. The maximum current carrying capacity of a voltage jumper (U
M
or U
S
) is
reached.
Содержание VersaPoint IC220PB001
Страница 4: ......
Страница 10: ...Contents x VersaPoint I O System Profibus DP NIU User s Manual August 2005 GFK 1911B ...
Страница 80: ...5 14 VersaPoint I O System Profibus DP NIU User s Manual August 2005 GFK 1911B 5 ...
Страница 100: ...6 20 VersaPoint I O System Profibus DP NIU User s Manual August 2005 GFK 1911B 6 ...
Страница 166: ...A 10 VersaPoint I O System Profibus DP NIU User s Manual August 2005 GFK 1911B A ...