8
4.3. CONNECTION OF UNITS AT 220 Vac
The unit has to be installed following the prevail-
ing regulations for electrical installations. The unit will
not be completely protected if it is not used according
to the information given in the manual.
The unit has to be placed in such a way that the
elements which may get interferences, such as the
sensor inputs, the sensor power supply, the links to
the PC and modem, have their cables in the best em-
placement, so that they do not receive interferences
from power elements which might be in their sur-
roundings.
All the connection terminals of the Agrónic 4000
can be switched which allows a fast maintenance.
PROGRÉS also offers a protection box for all the
terminals, in case there is a high risk of electrical
sparks from storms entering the cables.
4.3.1. Power connection
Before connecting the unit, it is necessary to
check its identification label where the characteristics
of the power supply are to be found.
The standard power supply is at 230 Vac, being
possible at 115 Vac. but it is necessary to ask PRO-
GRÉS about this last one.
Connect the phase and the power supply neutral
to the terminals marked as “F” and “N”.
A 6 Amp magneto-thermal switch is to be in-
cluded in the installation. It will be used as a discon-
nection device and it has to be placed near the unit at
an accessible place for the user.
It is recommendable to do this as directly as pos-
sible, avoiding that the same cable supplies other
devices. Use cable of the H05VV-F type, 1 mm
2
.
The power supply input is protected by a fuse,
marked as General Fuse and a varistor. The varistor
might short-circuit the fuse automatically, on detecting
an overload on the line (lightning, etc.). Replace it with
one of the same characteristics.
For unstable or fluctuating voltages use grid sta-
bilizers.
4.3.2. Digital input connection
The different elements of the installation, such as
pressure gauges, levels, meters, etc. are to be con-
nected to the group of 12 terminals labeled as “Digital
inputs (D)”. This is done by connecting one contact
pole to the corresponding input and the other pole to
the 24 Vac “COMMON”.
Contacts must normally be open and free of volt-
age.
One of the 48 possible functions can be assigned
to everyone of the inputs in the section “Parameters -
Sensors”.
The inputs are optically isolated from the internal
circuitry and depend on the same 24 Vac power sup-
ply of the outputs.
4.3.3. Output connection
All outputs are ready to work at 24 Vac (it is very
important not to supply the unit with voltages above to
30 V).
The unit must have a external transformer with 24
Vac output and double isolation according to the UNE
EN61010 norm. Its input will be connected to the out-
put of the magneto-thermal switch which protects the
Agrónic 4000. The 24 Vac output is connected to the
terminals marked with this voltage, entering a pole of
the output of the transformer into one of the terminals
marked as “COMMON / 24 V N”, and the other pole
into one of the terminals marked as “24 V F”.
Connect the solenoids, relays, etc., between the
output common “COMMON” and the corresponding
output.
Do not exceed the maximum power by output of
1 Amp. and the general of 6.3 Amp. If this happens
insert external relays.
The “output fuse” protects from overloads and
short-circuits; to replace it half turn the cover of the
fuses box and replace it by another one of similar cha-
racteristics.
The “AUX” terminal corresponds to the “PHASE”
of the 24 Vac which goes through the fuse. It will be
useful to connect auxiliary elements of manual com-
mand and extensions of relays above to 32 outputs.
The outputs are isolated from the internal circuitry
by relays and protected by a varistor at everyone of
them, plus a general gas discharger in the lines of 24
Vac.
The number of outputs can vary from 16 to 24,
32, 48, 64, 80 or 96 in the same unit. It is possible to
extend the outputs at a distance, in external modules
“via radio” or “via cable”. The maximum number of
sectors to be controlled by the Agrónic 4000 is 99.
