User's Manual
Introduction
PIU - Piccolo Interface Unit
The Piccolo Interface Unit (PIU; see Figure 2) is connected
to the IRRInet Field Unit (FU) via RS232
or RS485 serial ports.
Each PIU supports up to 256 Piccolo–XR units, with any
available I/O combination, limited by the capacity of the
IRRInet software only.
Utilizing the S&F technology and networking capabilities,
the PIU can be linked to Piccolo–XR units positioned in
distances of up to 1500-2000 meters (approx. 1 mile),
depending on topography, antenna type and antenna
installation.
The PIU is an interface between the Piccolo–XR and the
IRRInet FU, which provides communication and
networking operations only. (Monitor and control features
are not included in the PIU.) That is: The control and
monitor functions are provided either locally, by the
Piccolo–XR or by an upper hierarchy unit (i.e. IRRInet
FU).
The PIU is a portable device, which is most commonly
used in the fixed installations enclosed with an indoor
plastic housing.
The PIU must be installed by qualified and authorized
technicians, so as to meet applicable safety standards and
to ensure protection against weather hazards for the unit.
If the PIU will be connected to outdoor lines, an interface
unit, complying with Clause 6 of the UL 60950 standard
must be provided.
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