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Table A2 - description of the elements present in the control circuit of the
solar inverter 1.
Des. Equipment Function
S1 Command selector Active (“RUN”) of solar inverter 1
R1
Relay # 1 (TA1-TC1) of the solar
inverter
Contact “NO” is closed inverter
ready
R2
Relay # 2 (TA2-TB2) of the solar
inverter
Contact “NF” is Open Inverter
Ready
K1 K1 contactor control coil Selection of photovoltaic panels
K2 K2 contactor control coil Power grid selection
Inv. 1 source Solar inverter 24VDC source It feeds the contactor K1
Inv. 2 source Solar inverter 24VDC source Power the contactor K2
COM Common Source Point Contactor supply, signals
DI1 Input signal port # 1 Inverter outdoor activation signal 1
Solar inverter control circuit 2 (Biocooler motor control).
A3 - solar inverter control circuit 2
7
Photovoltaic cell
EM12-SP
+10V AI1 AO1 485+ DI1 DI2 DI3 DI4 DI5 HDI
GND AI2 AO2 485- GND COM CME COM +24V COM
TA TB TC
FM DO1 COM
OFF
ON
JP2 JP6
CME
COM
V
I
JP3 JP4
1
3
2
1
3
2
1
3
2
1
3
2
JP8
1
3
2
+ (R)
- (T)
AC input
Diagram3-2 EM12-SP control circuit and main circuit wiring
+ +
+ +
Photovoltaic Panels
DC
Booster
K1
K2 D1
S1
K2
21
22
+
-
+
-
21
22
K2
K1
K1
R1
Inv. R2
Inv.
D1
(Run Stop
Command)
DI1
(Inverter)
(Always Run)
DI2
(Inverter)
(Low)
DI3
(Inverter)
(High V.)
BT2
COM
COM COM
RC BV RC AV
COM
TA1
TC1
TA2
TB2
Grid
COM (PV System)
Inverter 1
Source Inverter 2
Source
M
Board
Tran.
1 2
3 4
5 6
1 2
3 4
5 6
DC
DC
Solar
Inv. 1 Solar
Inv. 2
Biocooler
400V AC
400V AC
230V AC
+/R W
V
-/TV U
R
S
T
+/R W
V
-/TV U
Table A3 - description of the elements present in the control circuit of the
solar inverter 2.
Des. Equipment Function
RC BV Low speed interface relay Low speed indication to inverter 2
RC AV High-speed interface relay High speed indication to inverter 2
COM Common Source Point Contactor supply, signals
DI1 Input signal port # 1 Inverter outdoor activation signal 2
DI2 Input signal port # 2 Low speed outdoor signal inverter 2
DI3 Input signal port # 3 High speed outdoor signal inverter 2
For more information on solar inverters, please
refer to Annex B.
Annex B - Solar Inverter
The solar inverter converts the DC current of the pho-
tovoltaic panels into AC power in three phases with
about 380 V and a nominal power of 2200W.
Security information:
•
Access and handling of the inverter must be carried out by
suitably qualified persons.
•
When servicing the inverter ensure that the photovoltaic
panels are plugged in and the power cables disconnected.
•
Do not touch the terminals with your hands.
•
Do not change the values of the parameters in the solar
inverter, it can cause them to fail and consequently to mal-
function.
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Photovoltaic cell
EM12-SP
+10V AI1 AO1 485+ DI1 DI2 DI3 DI4 DI5 HDI
GND AI2 AO2 485- GND COM CME COM +24V COM
TA TB TC
FM DO1 COM
OFF
ON
JP2 JP6
CME
COM
V
I
JP3 JP4
1
3
2
1
3
2
1
3
2
1
3
2
JP8
1
3
2
+ (R)
- (T)
AC input
Diagram3-2 EM12-SP control circuit and main circuit wiring
+ +
+ +
Photovoltaic Panels
DC
Booster
K1
K2 D1
S1
K2
21
22
+
-
+
-
21
22
K2
K1
K1
R1
Inv. R2
Inv.
D1
(Run Stop
Command)
DI1
(Inverter)
(Always Run)
DI2
(Inverter)
(Low)
DI3
(Inverter)
(High V.)
BT2
COM
COM COM
RC BV RC AV
COM
TA1
TC1
TA2
TB2
Grid
COM (PV System)
Inverter 1
Source Inverter 2
Source
M
Board
Tran.
1 2
3 4
5 6
1 2
3 4
5 6
DC
DC
Solar
Inv. 1 Solar
Inv. 2
Biocooler
400V AC
400V AC
230V AC
+/R W
V
-/TV U
R
S
T
+/R W
V
-/TV U
B1- basic inverter diagram.
In the power circuit you have:
•
ter (R) and - (T) for connection of the panels
•
photovoltaic;
•
terminals U (T1), V (T2), W (T3) for motor connection.
•
In the control circuit you have:
•
(+ 24V COM), for external sensors and input, up to
200mA,
•
digital inputs (DI1 DI6) for inverter control,
•
two relays with normally open contacts (TA 1/2 TB 1/2)
and normally closed contacts (TA 1/2 TC 1/2).
The solar inverter display shows the following configu-
ration:
Indicators:
•
RUN - inverter status indication (OFF, off, ON);
•
LOCAL - inverter control type indication (OFF -
panel, ON - terminal);
•
DIR - indication of the direction of rotation of the
motor (OFF - reverse, ON - direct);
•
TRIP - torque control (always ON), adjustment in-
dication (blinks slowly), error / fault (blinks quickly).
Button Diagram:
•
PGR / ESC - menu entry and exit;
•
DATA / ENTER - parameter entry and confirmation of settin-
gs;
•
“Up arrow” - increments values, navigates through the
menu;
•
“Down arrow” - decrements values, navigates through the
menu;
•
“Right arrow” - selects the displayed parameter numbers,
•
RUN - start of inverter (on control panel);