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If a single port has more than 64 Controllers or is longer
than 4000 ft., you will need a bus repeater (QD1011a) or
QW1010a Zigbee wireless gateway (limit of 15 wireless
units per wireless gateway). You will need an additional
bus repeater for each wired group of 64 units.
For best results, on wired networks, we recommend that
you segment the network into groups of approximately
40 controllers (requires separate QD1010-USBs
plugged into different comm/USB ports for each network
segment). This ensures all devices on each network
leg will be polled and reply during a single polling cycle
(factory default is a 1 minute polling cycle). Although
using a repeater will allow all devices on large networks
to communicate and the network to function, you may
find that it takes multiple polling cycles to communicate
with every device.
When connecting controllers on a network, you may use
any wiring configuration (i.e. "daisy chain", "star", etc.),
as long as all "A" terminals are connected together,
all "B" terminals are connected together and all “Ref”
terminals connected together. The integrity of the "A",
"B" and “REF” wiring runs must be maintained or the
network will not communicate properly. Also, a 120
ohm terminating resister should be installed at the
farthest end of the network (one is already built-in on the
QD2010a).
CAUTION:
You must maintain proper polarity of "A",
"B" and "REF" connections. All shields must be tied
together, taped off to prevent any accidental connections
then grounded at one end of the network. Caution
should be taken to avoid running wire near power wires,
frequency drives, fluorescent lights, ballasts, etc., which
can all compromise the communications signal. Care
should also be taken to leave as little wire exposed as
possible.
Critical:
Avoid noise on the communications line by
grounding the shield. The signal that passes information
is 1 to 5 V. If you measure across A and B, you should
get 0 VAC, and 1 to 4 VDC. There should be 0 VAC
and 0 VDC between either A on B and the shield. If
you are getting more than this, check for runs against
high voltage, for exposed wires, to see if grounding at
only one side, or that you have used dedicated power
for the controllers or if you have reversed power on a
Controller(s).
NOTE: By using wire cable consisting of one triple
of twisted shielded wire and one pair of unshielded
wire, you can run power to controllers and run
communications wire in the same cable. Part #
PM2000A
NOTE: Be sure to check any local codes to confirm
the wire choice meets the code.
The QD2010a requires at least one QD1010-USB (USB/
RS485 communications converter) be attached directly
to the USB port on the side of the unit. The controller
network wiring connects to the QD1010-USB as
described above. Up to 3 controllers can be placed on
the built-in USB port.
Setup Page
Once you have made connection and have logged in
you are able to configure the operation of the unit by
selecting the proper parameters for your application. All
Ubiquity Application software and functionality is
accessed by logging into the Central Server
(
www.ubiquitysystems.net)
NOT by using this setup
page.
INSTALLATION INFORMATION
This section contains installer and site related
information. The information entered here is sent along
to the central server when a site initially comes online
to help identify the site to link it to the correct Ubiquity
site. For the most part, this information is for reference
purposes only, except for the Site Time. The Site Time
is used by the local network and QD2010a until the
Ubiquity central server performs a time synchronization
with the site.
NOTE: Be sure to set the time 5 minutes ahead of
the actual time. This allows the correct time to be
used when the gateway next resets its time.
NOTE: Be sure to set the correct Time zone so that
the site will correctly adjust the time during future
time synchronizations with the central server.
Once you are finished entering information in this
section, click the Update Installation Info button.
