User's Manual

CHAPTER 1
Introduction
6
The addIT A723 Series 4 RTU can be used in one of the following
way:
• Installed in the vicinity of an Adcon remote measuring station
(A72x, A73x, A74x), the addIT RTU can use the A73x and
A74x stations to relay its data to a base station (A840 or
A850). If the base station is close enough to the addIT RTU,
the RTU can communicate directly with the base station.
Installation issues
The following restrictions apply:
• In general, the maximum “line-of sight” distance an addIT
RTU can communicate is 800 m (approximately half a mile).
This is valid if the partner device is mounted on a 3 m mast (9
ft.) and the RTU is mounted on a 30 cm mast (1 ft.); the results
may vary under different conditions.
• As with all wireless communication devices, the higher the
transmitter is, the better the communication will be.
Mountainous or hilly terrain makes for poor communication.
• When using the addIT RTU with an A73x or A74x system,
Adcon strongly recommends limiting the number of RTUs to
under 6 per A73x or A74x station in order to avoid exhausting
the station’s battery, especially during the winter. However,
you can have as many RTUs as you want if they are directly
connected to the base station. The maximum number of
stations is limited by your A840/A850 Gateway license.
Note: Your local conditions may vary. If you are located closer to
the Equator, the maximum obtainable energy is greater than
that at the Poles and it may be possible to “hang” more
addIT devices per station.
• addIT RTUs cannot route data.
• All addIT devices accept the standard Adcon sensors.
Waterproof connectors are used to provide IP65 class
protection. All sensors will be delivered with this connector. A
special adapter will be supplied to connect new sensors to RJ-
12 ports of the A730MD stations.
Note: For technical reasons, Adcon cannot provide adapters for
the RJ-12 connector to the addIT devices.