Manual selection, installation and maintenance
9
Roof-top units -
RTE series
-
The structure of the microprocessor
openominal regulator includes:
• one or two microprocessor-dedicated
BASE CARDS for the executions of the
regulation program. The base card is
equipped with display, keyboard and
LEDS to program the control parameters
(setpoint) and the main operations from
the user (ON/OFF, display of the con-
trolled values, optional print-out).
• The program is written on EPROMs
while the parameters set are memorised
in a permanent way on EEPROMs, ena-
bling them to be maintained even when
there is a no power supply (with out
the need of a backup battery).
The base card also allows the connec-
tion with the local network consisting
of several basic cards and several termi-
nals. Every card can exchange informa-
tion (any digital or analogue variation
according to the application pro-
gram) with a high transmission speed.
It is possible to connect up to 16 units
(cards and terminals) for a maximum of
5 rooftops in order to be able to share
the information very quickly. The con-
nection towards the supervision/remote
assistance line according to the stan-
dard RS422 or RS485, is constructed
through the optional serial card and the
protocol of through the optional serial
cards.
The connection of the terminal to the
base card is not necessary for the con-
troller to operate at full capacity, but
it can only be used for the initial pro-
gramming of the main parameters.
Thanks to the potential of the applica-
tion program, the user terminal allows:
• To modify the main parameters optio-
nally protected by a password
• To display the detected alarms and to
signal them by means of a tone
• To display the active functions by
means of LEDS
• To display all the measured values
Regulation system
G
0
G
C
N
Y
S
1
B
2
B
3
B
4
B
D
N
G
F
E
R
V5
+
C
D
V4
2+
1
Y
2
Y
3
Y
D
N
G
1
DI
2
DI
3
DI
4
DI
5
DI
6
DI
1
C
DI
-
XT
X
R
+
XT
X
R
D
N
G
N
AL
T
D
N
G
1
C
1
O
N
2
O
N
3
O
N
4
C
4
O
N
5
O
N
5
C
5
C
N
1J
5J
6J
7J
8J
9J
01
J
11
J
2J
3J
4J
CLOCK CARD
SERIAL CARD
built-in terminal
5.3
1
5.3
0
5.3
1
5.4
10
5.4
12
5.4
13
5.5
14
5.5
9
5.5
11
5.6
15
3.7
6
5.2
8
5.2
0
4.7
46
4.7
44
2.7
35
4.6
43
2.8
36
3.5
45
4.8
30
RT
- 5.1
RT
+5.1
GND5.2
82
2.3
84
2.3
89
4.4
86
2.5
82
2.6
87
2.6
88
3.4
82
3.4
