Kohler PowerWAVE 8000DPA RI (S2) Series, Руководство пользователя, Страница: 27 / 88

TS_616_08 PW8000DPA ST (S2) User Manual 21/4/22
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2: General Description
Figure 2.14 illustrates the UPS module communication facilities for a parallel cabinet PowerWAVE 8000DPA ST (S2)
installation (two cabinets are shown).
Module parallel control
This diagram shows that in a parallel cabinet system the UPS modules within each cabinet communicate with each other
via the cabinet’s internal parallel bus in exactly the same manner as described for a standalone cabinet system. However,
in this instance an external parallel control bus is connected between the cabinets which effectively links the internal
parallel buses to form a single, common parallel control system.
For control purposes, the cabinet that contains the master UPS module is configured as being the ‘master’ cabinet, and as
module 1 is normally set to be the master module, the master cabinet is usually cabinet 1. Note that the master module/
cabinet configuration is set by the commissioning engineer.
A system control panel is fitted to the door of the master cabinet which, as in the standalone cabinet installation, can
monitor and control each module (in any cabinet) individually or operate at a system-wide level.
Customer interface facilities
The communications interface board (CIB) fitted to each cabinet offers the same external interface facilities as those
described for the standalone cabinet installation. However, this can be modified by the ‘multidrop’ feature, which is shown
as a separate parallel connection between the cabinets in Figure 2.14.
Multidrop is an optional feature that enables the customer interface board fitted in the master cabinet to collect data from
ALL the slave cabinets. It then generates a single data-stream combining the data from every cabinet, and makes it
available at the RS232, RS485 and NIC interface ports in the master cabinet. With multidrop installed, the interface
between the entire UPS system and a network management system can therefore be implemented using a single cable
rather than requiring an individual cable for each UPS cabinet.
Note: Although the multidrop option is shown as being connected using a separate cable in Figure 2.14, in the
PW8000DPA ST series UPS the multidrop data is transmitted via the parallel control bus cable and is operationally
configured during the system commissioning.
2.5.3 UPS Interface boards
Two interface boards are fitted in the lower part of the UPS cabinet, adjacent to the maintenance bypass switch. One is
the customer interface board, which provides a means of connecting the UPS cabinet to a range of external monitoring
and control facilities. The other is the parallel interface board which contains the connections used to control and monitor
the cabinets when connected as part of a parallel cabinet system.
These boards are illustrated in Figure 2.15, with detailed application and connection details provided in the Options
chapter of this manual.
Key Point: When the multidrop feature is used, the I/O facilities of communication interface board in the ‘slave’
cabinet(s) are all disabled, but the customer interface board fitted to the ‘master’ cabinet remains fully functional.
Key Point:
The parallel interface board is part of the factory-fitted ‘paralleling kit’ and is installed only in UPS
cabinets that are used in a parallel system.