ADPRO
iFT Series Hardware Installation Manual
27817_08
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14.5
Connection via the USB-to-RS-485 8-Channel
Distribution Unit
The USB-to-RS-485 distribution unit provides 8 channels to easily connect and configure the PIR detectors on
the XO device.
Each PIR detector needs a unique address. For the appropriate address ranges, see
page 53. You can use the unit, together with the ADPRO PIR software on your PC, to assign a unique address to
the PIR detector. In this case, connect the distribution unit to your PC, and connect only 1 PIR detector per
channel on the distribution unit. For details, see datasheet
USB-RS-485 distribution unit
(19532060).
Once you have assigned unique addresses to the PIR detectors, you can connect multiple PIR detectors to the
same channel on the distribution unit, allowing you to connect 32 PIR detectors to an XO device using only
1 distribution unit. Depending on the existing installation (see the restrictions on distances and cable lengths
further below), you can determine which PIR detectors you connect to which channel. If necessary, you can
connect up to 4 distribution units in cascade. In that case, you connect only one of the 4 distribution units directly
to the XO device.
Keep the following in mind:
l
Before connecting multiple PIR detectors to the same channel, you have to assign a
unique address
to each
PIR detector.
l
Connect the distribution unit to the
/dev/ttyU2
USB port on the XO device. Do not use any other ports.
l
Restart the XO software after connecting the PIR detectors to the USB port.
l
Only the 485 bidirectional communication of the PIR detectors is used, not the mechanical PIR tampers.
l
The
maximum distance
between distribution unit and PIR detector is 200 m. If the distance is longer than
200 m, then the PIR detector needs a separate local power supply.
l
With local power supplies, the
maximum distance
between distribution unit and PIR detector is 1200 m.
l
The
maximum length
of the USB cable between the distribution unit and the XO device is 1 m.
l
If you use several distribution units in cascade, the
maximum length
of the cables between the units is 1 m.
