Specifications

Why different buses
and solutions
• RS422-RS485 communication in a local
network:
all the measurements made by single
instruments can be gathered through a standard
Modbus to a PLC or a PC in order to carry out
specific variable analysis and control (PowerSoft).
• Modem/RS232 communication: if the
measuring devices are spread in a wide area
or in different countries with the need to
collect the local data for centralised analysis,
the right answer is WM4 or PQT 90 with
external modem together with Wm4Soft or
PqtSoft software.
• Web-server capability: if it is needed to read
the variables and download the logged data
exploiting the existing LAN, the solution is WM4
or PQT 90 with AR1060 plug-in module. It
easily displays the variables, the consumptions
and the trends in any enabled PC of the LAN,
(or connected to the internet) simply using a
browser.
• Ethernet communication: all the data
acquired or stored by any instrument can easily
be trasmitted via Ethernet over the LAN (or
internet) to a Modbus TCP SCADA or
management software or PowerSoft. The
Ethernet port is on-board (WM5 or PQT H) or
available using an external accessory (VCP
DIN or SIU TCP).
• Dupline communication: if the load
consumptions and alarms are to be monitored
together with a powerful building automation
system, the unique solution is called Carlo
Gavazzi Dupline installation bus. Everything
under control using only one bus system.
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