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SERIAL CONVERTER TTL/RS485
OPTIONAL
Plugged-in in the main module on the electric board (see lay in the wiring diagram). It is possible
to connect up to 127 units with a single supervision system.
The connection with a PC must use a RS485/232 converter; the serial line RS232 can be max. 10-
m long.
CONNECTIONS:
make reference to the electrical panel and to the SIGNALS AND DATA LINES paragraph
FUNCTIONAL CONNECTIONS
FOR ALL THE CONNECTIONS MAKE REFERENCE TO THE ELECTRICAL PANEL SUPPLIED WITH UNIT
Use voltage-free remote control devices that are suitable to commutate very low loads (12V, 10mA)
Few inputs must be activated by configuration parameters whose access is reserved to authorized assistance centres (in order
to avoid unauthorized modifications)
1. remote ON / OFF
2. remote SUMMER / WINTER
3. remote SECOND SET POINT (ECO )
4. Machine OPERATION / SHUTDOWN SIGNAL
5. REMOTE KEYPAD
6. ELECTRIC INTEGRATION during heating
7. coupling
with
BOILER
8. SANITARY HOT WATER
9. UNDERFLOOR
HEATING
10. SET POINT COMPENSATION for outside temperature/enthalpy
11. SET POINT COMPENSATION with 4-20 mA signal
12. interface via RS485
1.
ON / OFF FROM REMOTE CONTROL
Generally the unit is delivered with bridged terminals; if the control is not used, the bridge should not be removed
2.
CHANGING FROM SUMMER TO WINTER USING THE REMOTE CONTROL
This function is activated with the 163 remmode = 1 parameter.
Selection switch open – unit in heating mode, selection switch closed – unit in cooling mode, this way the keyboard or
supervisor unit selection is deactivated.
3.
SECOND SET POINT FROM REMOTE CONTROL (ECO)
Use of a second set point (par 29 cooling, par 30 heating), usually higher in summer and lower in winter (ECO). The
commutation can be also performed manually by keypad.
The SANITARY HOT WATER option may entail modifications of the input in question: see the relative section.
4.
SIGNALIZATION OF MALFUNCTIONING/ UNIT FUNCTIONING
Remote signalisation of the proper function (ex. green light) or signalisation of blocks of the machine (ex. red light).
Maximum voltage at the terminal ends is 24v ac and maximum power is 1A (ac1) .
5. REMOTE
KEYPAD
Max. Length
100 metres
VOLTAGE 230/1/50
Signal conductor number
2 + shield
Min. length
0.34 mm
2
8
1 2 3 4 5 6 7
CN2
12
10
9
11
16
+5
V
1
3
14
15
gnd
19
17
1
8
21
20
SERIALE
TTL / RS485
CN1
gnd
12
V
A
C
+-