Electrical connection
109
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 storms and static electricity are usually the result of
faulty construction.
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 20 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 strip
terminal above the inlets is available for the protective conductors. During assembly, this strip terminal
can also be removed to make it easier. All cables can be fixed with a clamp (= strain relief) immedi-
ately 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 con-
nected.
There is only one connection to ground (GND) for all of the sensors on the protective low voltage side.
There is thus a mass terminal at the top right of the console, which must be connected to the GND
clamp before the sensors are clamped.
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 lines is put
through the cable channel the right side of the console and the bridge for the particular terminal, while
the second pole is connected to the ground line at the top right.
The universal controller UVR1611 can be upgraded with the HiRel1611. This allows an ex-pansion
from 11 to 13 outputs. For this purpose, sliding grooves are intended on the left side of the controller’s
console (designated as slot 1 in the controller’s mounting instructions).
The relay contacts are potential-free, while both roots C are connected
ex works. By widening the hole between the two relays to at least 6 mm
in diameter, the potential for both outputs is separated against each oth-
er in accordance with industry standards.
Drilled hole
NC
... Normally closed contact
NO
... Normally open contact
C
...
Root
Rela
y
2
Rela
y
1
