ABB S800 I/O, Руководство пользователя

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The total power dissipated in the cabinet can thus be written:
3
)&,
= Power of the FCI Module
3
,2
= Power of each S800 I/O Module
3
9ROWDJHVXSSO\XQLW
= Power loss of the power supply unit(s)
3
6XQGU\
= Miscellaneous power using equipment installed in the cabinet.
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From the maintenance point of view, use as few module types as possible in the
hardware disposition of a control system. This is most relevant with the process I/O
design. Standardization of I/O signal types and other electrical qualities is important
to minimize the spare part stock.
Your solutions must make sense to the maintenance people in the event of
disturbances and following trouble-shooting.
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A new S800 I/O station can be connected to an existing fieldbus without affecting
other stations and controllers. The new I/O is automatically incorporated in the
communication system. Spare connections must be pre-installed as to not disturb
the existing bus.
The system fieldbus can be expanded in the following ways:
• Process I/O or MTU unit
New I/O modules can be added on line. It is recommended to have approximately
10 - 20% of total capacity as spare channels, and spare space in subracks.
Spare MTUs need to be pre-mounted to add I/O modules on-line.
P
Total
P
FCI
∑
( )
P
IO
∑
( )
P
Voltagesupplyunit
∑
( )
P
Sundry
∑
( )
+ + + =