Salicru 4.. 20 kVA series, Руководство пользователя

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of the installation (equipment power supply and/or loads, type
of loads,...).
In parallel systems, it is not possible to operate with separate
isolation transformers for each UPS. So it is necessary to have
only one transformer for the complete parallel system of the
suitable power rate.
In any case, it will always be supplied as a separate item to the
own UPS enclosure.
4.4.2. External manual bypass manual.
The purpose of this option is to isolate electrically the equip-
ment from mains and critical loads with no break. Therefore the
maintenance or reparation tasks can be done in the equipment
with no breaks in the power supply of the protected system and
at the same time undue risks to the technical staff are avoided.
The basic difference, between this option and the integrated manual by-
pass in the own UPS enclosure is its better operability, because it allows
the total disconnection of the UPS from the installation.
4.4.3. Communication card.
In the rear side of the UPS there is a slot, which allows in-
serting any of the following communication cards.
4.4.3.1. Integration into IT networks by means of the SNMP
adaptor.
The large-scale IT systems based in LANs and WANs, which
integrates servers with different operating systems, must in-
clude an easy control by the management of the system. This
feature is get by the use of the SNMP adaptor, which is ac-
cepted by the main manufacturers of software and hardware.
The connection of the UPS with the SNMP is internal, mean-
while the connection between the SNMP and the IT network is
done by means of a RJ45 10 base connector.
4.4.3.2. RS485 Modbus.
Many times, the large-scale IT systems based in LANs and
WANs require communication by means of a industrial standard
protocol with any part or component integrated inside the IT
network.
One of the most used industrial protocols in the market is the
MODBUS protocol. The SLC TWIN PRO2 series is ready to be
integrated in this kind of environments either by means of the
“SNMP mini card” adaptor or the RS485 Modbus card which is
described in the documentation of the optional.
4.4.3.3. Dry contacts.
•
As an option, the UPS has a dry contact card, which pro-
vides digital signals, with maximum applicable voltage and
current of 240 V AC or 30 V DC and 1A.
•
This port provides a dialogue between the equipment and
other machines or devices, thanks to the supplied dry con-
tacts, which includeds a terminal strip located in the own
card, with only one common terminal for all of them.
All the dry contacts are normally opened, preset from fac-
tory, being able to set them independently, according to the
information supplied with the option.
•
The most common use of these type of ports is to provide
the needed information to the closing file software.
•
For information, contact with our T.S.S. or our closest dis-
tributor.
SLC TWIN PRO2 UNINTERRUPTIBLE POWER SUPPLY (UPS) USER'S MANUAL