23
The length of the parallel cable is 1.5 metres and it can't be
extended under no circumstances, due to the risk of interfer-
ences that it would mean.
Fig. 22 shows an installation of two equipments in parallel.
For three UPSs proceed in the same way to close the com-
munication bus and current sharing circuits.
•
Parallel installations must have a switchgear panel with sep-
arate input and output protections for each UPS, apart from
a manual bypass switch with mechanical lock, see Fig. 23.
For more information, about the descriptions referred to the
manual bypass and the indications of the «Recommended
installation» see section 5.1.5.4.
•
Respect the stated procedures in the previous sections, for
the input and output connections of each equipment.
•
For those equipments with extended back up time, respect
the stated procedures for the battery modules, which are de-
scribed in the previous sections.
•
In parallel systems, where the length and cross sec-
tion of the cables that go from the switchgear panel
to each UPS and from the UPS to the switchgear panel will
be the same for all them, with no exception.
In the worst conditions, the following deviations must be
strictly respected:
When the distance between the parallel UPSs and the
switchgear panel is less than 20 metres, the length
difference among the input and output cables of each
equipment must be lower than 20%.
When the distance between the parallel UPSs and the
switchgear panel is over 20 metres, the length difference
among the input and output cables of each equipment
must be lower than 10%.
5.2.11. Communication port.
5.2.11.1. RS232 and USB ports.
•
The communication line -COM- means a low safety
voltage circuit. To preserve the quality of them, they
must be installed separate from other lines with dangerous
voltages (energy distribution line).
•
The RS232 and USB interface are used by the monitoring
software and firmware updating.
•
It is not possible to use both ports (RS232 and USB) at the
same time.
•
Tab. 4 shows the pin-out of the RS232 signal in the DB9
female connector. The RS232 is a serial data port, so an
important amount of information can be sent through a
communication cable of 3 wires.
•
The USB communication port is compatible with the USB
1.1 protocol for the monitoring software.
5 1
9 6
2 1
3 4
Fig. 24.
DB9 connectors for RS232 and USB.
Pin #
Ref.
Description
Input / Output
2
RS232
TXD (serial data transmission)
Output
3
RS232
RXD (serial data reception)
Input
5
RS232
RS232 ground signal
GND
Tab. 4.
DB9 connector pinout, RS232.
5.2.12. Intelligent slot to insert the communication card.
•
Different communication cards can be inserted into the slot:
Programmable dry contacts.
SNMP adaptor.
RS485 Modbus adaptor.
•
Each option card is supplied with its own particular docu-
mentation. Read it before installing them.
Installation.
•
Remove the protection cover from the slot of the equip-
ment.
•
Take the corresponding card and insert it into the reserved
slot. Make sure that it is well connected, to do it the resist-
ance that own connector faces when it inserted into the
slot has to be overcome.
•
Make the needed connections of the terminal strips or con-
nectors depending on each case.
•
Put the new protection cover supplied with the option cards
and fix it by means of the same screws that previously fixed
the original one.
•
For more information, contact with our
T.S.S.
or our nearest
distributor.
5.2.13. Software.
•
Download the free software - WiewPower.
WiewPower is a UPS monitoring software, which has a user
friendly interface for monitoring and control. This software,
in case of power outage provides an auto Shutdown for a
system based on several computers. With this software,
the end-users can monitor and control any UPS hosted in
the same IT network, by means of the communication port
(RS232 or USB), no matter the distance among them.
•
Installation procedure:
Go to the website:
http://support.salicru.com
Choose the operating system that you need and follow
the instructions described in the website to download
the software.
SLC TWIN PRO2
UNINTERRUPTIBLE POWER SUPPLY (UPS)
USER'S MANUAL
