EN
The additional
flow
sensor may be used to detect leaks
of the systems operating in the closed system. It should
be connected to the additional input 3. The sensor
should be connected
with
the 2 terminal connector
marked with the following numbers:
54
- signal input for the additional flow senso
r,
50 -
additional flow sensor signal reference output.
Moreover, you can also connect the sensor communica-
tions and power supply input:
9 -
power
supply output for the
flow
sensor (from the
main power supply source),
55 - signal input to communicate
with
the additional
flow sensor (additional input 2) (only if it is configured
as a input of digital communication with the
flow
sensor
).
Please refer to the diagram
below
(fig.
16)
to connect
the additional
flow
sensor
with
the open collector
output for the sensor
with
the required
power
supplied
from the calculator
(1),
open collector
output(2)
and the
normally closed contact output (3)
Fig. 16.
Connecting external power supply
The calculator can be
powered
from 230VAC or 24VAC
power
adapter, as
well
as using AA batteries,
two
AA
or C batteries mounted on a separate plate or D bat-
tery mounted directly in the base. Opening the cover
provides direct access to the main battery or
power
adapter (Fig.
19).
If you are replacing the D battery on
your
ow
n, pay attention to
how
it is mounted in the cas-
ing, the positive pole should be facing the upper edge
of the casing. Each battery or
power
adapter has cables
to be connected to the calculator. Main
power
supply
must be connected on the terminal block (Fig.
9)
to the
connector marked
with
numbers:
60 – positive pole,
61 – negative pole.
In case of calculator equipped
with
power
supply
:
the
power
adapter should be connected to the ~230 V
power
supply and to the terminals marked
with
num-
bers 27 and 28 (Fig.
18);
for the 24 V
power
adapter the
~24 V
power
should be supplied to terminals marked
with numbers 97, 98 (
F
ig. 19).
The
power
adapter has
two
sets of terminals marked
with
numbers 95 and 96,
allowing
for the supply of
power
to interchangeable communication modules
(terminals on modules marked
with
numbers 97 and
98).
The electrical connection of
power
adapter should
be performed by a properly licensed person.
Fig. 17.
Fig. 18.
Fig. 19.
97
24VA C
98
Connecting additional input signals
Each version of the terminal block has 4 additional
inputs. Each of the inputs marked I1 (terminal no. 56
and
50),
I2 (terminal no. 55 and
50),
I3 (terminal no. 54
and
50),
I4 (terminal no. 53 and
50)
can operate as an
impulse input, the I3 input can additionally serve as an
alarm input or additional
flow
sensor conection, and the
I2 and I4 inputs can be used for digital communication
wit
h t
he flow
sensor.
Each input has
two
terminals, marked as f
ollow
s
:
– signal input (terminal no. 56, 55, 54, 53
)
– reference input for additional input, each input has
a separate terminal for reference signal connection
(terminal no
. 50)
.
Fig. 20.
Fig. 20 sh
ow
s the signal connection method for a sam-
ple additional input, for a device
wit
h output ty
pe:
open
collecto
r (1), n
ormally open contact
(2)
.
Note:
in the case of ultrasonic
flow sensors
with a 4-wire
connection (eg Sharky 473) the fourth wire (yellow) can
be connected only if input I2 is configured as a digital
communication with the
flow sensor
. Otherwise, do not
connect this cable. Incorrect connection may result in
premature battery wear.
