Technische Alternative UVR1611K-N, Руководство по установке

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Electrical connection
58
Trials at the factory
have shown the following:
1) Branches with a star topology of up to 10 m will not impede transmission.
2) Up to a bus length of 250 m and a transfer rate of 50 kbit/s, data transfer works perfectly with a low
number of CAN nodes and an inexpensive
J-Y(St)Y EIB KNX 2x2x0.8
KNX bus cable with a charac-
teristic impedance of 75 to 90 ohm.
3) Up to a bus length of 150 m and with only a few nodes, the
CAT 5 24AWG
cable (typical Ethernet
cable in PC networks) can be used.
Changing to cable types with different characteristic impedances is only permitted via signal separa-
tion through a CAN bus converter.
However, such networks do not comply with the recommended specification. Technische Alternative
RT GmbH therefore cannot guarantee trouble-free operation if one of the three options listed above is
applied.
Data link (DL bus)
Any cable with a cross section of 0.75 mm² can be used for the
data link
having a max. length of 30
m. For longer cables, we recommend the use of shielded cable. Cable channels for power and data
lines may cause a disturbance in the data lines if they lie too close to each other over long stretches.
Therefore a minimum distance of 20 cm between the two cable ducts or the use of shielded cabling is
recommended. Where the processing of two control inputs by the data converter are concerned sepa-
rate screened cables must be used. If screened cables are used, the screen must be connected to
the GND. Equally the DL must never be put through the same cable with the CAN.
Equally the DL bus must never be routed in the same cable as the CAN bus.
The data line is connected to clamp DL (A14) and sensor earth.
Electrical connection
It should only be made by a professional electrician in accordance with the relevant local guidelines.
The sensor lines must not be laid in the same cable as the supply voltage (standard, regulations). In a
jointly used cable channel, appropriate shielding and separation have to be provided.
Notice:
The system has to be grounded properly and furnished with surge arresters to protect it from
damage due to lightening. Sensor failures due to thunderstorms and static electricity are usually the
result of missing or incorrect earthing or missing surge protection.
Cable channels for power and sensor lines may cause a disturbance in the sensor lines if they lie too
close to each other over long stretches. If no fast signals (such as ultrafast sensors) are transmitted,
these disturbances can be filtered out by averaging the sensor inputs. However a minimum distance
of 5 cm between the two cable ducts or the use of shielded sensor cabling is recommended.
Caution:
Only work inside the console with the power cable disconnected. If you assemble the device
with the power connected, the device may be damaged.
All sensors and pumps/valves must be connected as they are numbered in the design selected. For
grade power, cross sections of 1 - 1.5² fine-strand are recommended except for the feed line. A termi-
nal strip is available for the earth conductors. During assembly, this strip terminal can also be re-
moved to make it easier. All cables can be fixed with a clamp (= strain relief) immediately after being
connected. A side cutter is needed to remove the clamps; therefore, more parts than necessary are
provided. Once all of the power connections have been made (without the protective conductor), the
protective conductor terminal is inserted, and the remaining ground wires are connected.
There is only one connection to ground (GND) for all of the sensors on the protective low voltage side.
An earth strip is located at the top of the mounting base. Prior to terminating the sensors, first connect
a cable from this strip to the GND terminal.
All of the sensor lines with a cross-section of 0.5mm
2
can be extended up to 50m. With this length of
line and a Pt1000 temperature sensor, the measurement error is approx. +1K. Longer lines or a lower
measurement error require an appropriately larger cross-section. One pole for these cables is con-
nected to the relevant terminal (S1-S16); the second pole to the earth strip at the top.