Site Planning
Workflow
Network Environment - UPS System
The UPS system is intended to
protect sensitive devices from power cuts, transient
voltage , spikes or other electrical disturbances.
The UPS system should be connected
to the network communication devices (communication
rack), the Ripro Server and/or other servers.
The UPS should not be connected to
the air-conditioning system or to any other non-essential
equipment. The UPS must be connected to a separate power
line in the electricity cabinet, with no other
instruments connected to it.
The UPS should be suitable to
protect computer equipment.
The UPS system should be able to
provide backup power to the communication rack or room
for 20-30 minutes.
Scitex recommends using an ON-LINE
UPS type, 1KVA-5KVA (conditional on the number of devices
attached to the UPS) in the communication rack and/or
room.
The UPS system comprises:
- Rectifier charger - receives
the net voltage and releases straight voltage.
- Inverter - receive straight
voltage and releases frequent voltage.
- Battery - stores energy and
supplies it to the inverter when required.
- Static switch - switches the
connection from the electricity net and the
inverter.
It is recommended to use a clogged
battery type inside the UPS.
Do not load the UPS more than 70 %
of the nominal load.
The recommended temperature around
the UPS should not be more than 25°C.
Around 8°C above the UPS data
sheet recommended temperature, can reduce the UPS life
time to 50%.
It is recommended to install a UPS
unit equipped with a RS-232 module in order to
automatically initiate the Ripro Server shutdown
procedure, in the case of a power cut/failure of more
than 20 minutes. The UPS connects to the Ripro Server
with a standard RS-232 cable.
The Ripro Server can be released
with an "ONEAC" UPS.
There are two possible UPS
configurations.
- If the Ripro Server and the
RiproStorage are not located next to the
communication rack, it is recommended to use two
separate UPS, one connected to the Ripro Server
and the second connected to the communication
devices located inside the communication room or
near the communication rack.
- If the Ripro Server and the
RiproStorage are located next to the
communication rack, Scitex recommends using only
one UPS for both the Ripro Server and for the
communication rack. (For this configuration it
will be necessary to enlarge the capacity of the
UPS)
For Example:
To calculate the required UPS capacity, for the
communication rack and/or room - use the power
consumption specifications for each device and calculate
the total power consumption of all the operating devices
in the communication room and/or rack at the site.
UPS power consumption calculation
for an average site is as follows:
The communication devices which are installed in the
communication room or in the communication rack are as
follows:
The required UPS is calculated
using
For future expansion and for
ensuring that the UPS is not more than 70% loaded add
30%.
1.5KVA + 30% (1.5KVA) =
2KVA.
An additional 20% capacity may be
added to the total power consumption for future
expansion.
For a communication room with the
above-mentioned equipment a 24000BTU air conditioning
unit is required (taking into consideration people
walking in and out of the room).
If the communication rack is
located in an open work space environment the appropriate
capacity for the air conditioning must also take into
account the additional power consumption of the equipment
in the room.
Scitex recommends using an on-line
model UPS (in preference to a change-over type), in order
to back up equipment in the communication room against
transient voltage and electrical disturbances. In
addition, it will also provide 20 minutes backup in case
of long power failures.
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