impro IMPROX TT, Руководство по установке

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XTT300-0-0-GB-16 January 2011 Page 4
Power Supply Combo (IPS910)

An ImproX (TT) Twin Antenna Terminal housed in a Black Mild Steel, powder-
coated Cabinet. The Cabinet consists of a hinged Lid and a Base.

Three Metal-oxide Varistors, 25 Vrms, 500 A, 77 V max clamping.

A glass Fuse, Slow Blow, 3.15 A, 250 V (5 mm x 20 mm).

Four Combi Screws (No. 4 x 10 mm).

An extra Fixed Address Label.
You will find the following when unpacking the optional extra Security Accessory Pack
(XTT911-0-0-NN-XX):

Two TORX® Fasteners (M3.5 x 10 mm).

A T10 TORX® Key.
General
Remember the following when installing the ImproX TT Terminal:
Communications Distance
The RS485 communications distance between the first ImproX TT and the LAST
ImproX unit in a cable run, MUST NOT exceed 1 km (1 090 yd). Achieve this by using
good quality screened twisted 2-pair cable, with the screen EARTHED at one end.
Jumper Links
Long transmission lines or multiple “star” connections, may cause communication
problems. Placing a Jumper Link across the jumper [TR1] in the LAST UNIT AT THE
END OF THE CABLE RUN should solve the problem. See Figure 6 for the location of
the jumper [TR1].
Antenna Reader Distance
The ideal cable distance between the ImproX TT and its Antenna Reader ranges
between 2 m to 16 m (7 ft to 53 ft). Optimal performance is not guaranteed outside of
this range. Achieve optimal performance using good quality screened, twisted pair
cable.
Distance between Antenna Readers from the SAME Terminal
To avoid mutual interference, install the Antenna Readers alongside each other at least
150 mm (6 in) apart.
Distance between Antenna Readers from DIFFERENT Terminals
To avoid mutual interference, install the Antenna Readers alongside each other at least
500 mm (20 in) apart.
NOTE: ImproX TT Terminals can be mounted alongside each other.
EARTH Connection
Connect the ImproX TT Terminal to a good EARTH point. Using the RS485 Port,
connect the EARTH Lead to the „
‟ Terminal. Mains EARTH can be used, but
electrical noise may exist.