Wiring Diagrams - Immergas SMARTECH PLUS Instructions And Warnings

4. WIRING DIAGRAMS

GATEWAY CONNECTION WIRING DIAGRAM
A30
5
4
BOILER CONNECTION ON TA
A30
BOILER CONNECTION WITH IMG BUS
A30
1
4
1
2
3
Boiler
Boiler
Key:
A30 - Smartech Plus Gateway
G4 - Gateway power supply unit
1 - Modbus RS485
2 - Potential-free contact Max. 0.5 A - 230 Vac (generator operation request)
3 - 230 Vac / 50 Hz power supply
4 - +5 Vdc power supply
5 - IMG BUS
BR - Brown
BL - Blue
W - White
Y - Yellow
N.B.: IMG BUS is a communication protocol only used by certain Immergas appliances, (see the instruction
booklet of the appliance).
N.B.: Modbus RS485 is a communication protocol only used by certain Immergas appliances, (see the
instruction booklet of the appliance).
N.B.: the X2 (IMG BUS) and X3 (Modbus RS485) connec-tors must be connected to SELV devices.
N.B.:the cables to be used for X2 and X3 connections must have an adequate cross-section and minimum
isolation of 300V.
N.B.: use the two wire sleeves supplied with the power supply unit, inserting them on the White (W) and
Yellow (Y) wires on the side of the terminal block (X4), to further isolate them from the Gateway inside.
N.B.: in case of connection via Modbus RS485, apply the 120 Ohm resistor supplied on the relevant terminals
of the appliance in parallel with the Modbus connection, (see the instruction booklet of the appliance).
Key:
A30 - Smartech Plus Gateway
G4 - Gateway power supply unit
1 - Cable not supplied by Immergas
BR - Brown
BL - Blue
W - White
Y - Yellow
N.B.: Connect the Gateway to the boiler terminals in-tended for communication of the CAR V2 marked 40
(or 44) and 41 (see the instruction booklet of the appliance)
N.B.: IMG BUS is a communication protocol only used by certain Immergas appliances (see the instruction
booklet of the appliance)
N.B.: the X2 (IMG BUS) and X3 (Modbus RS485) connec-tors must be connected to SELV devices.
N.B.:the cables to be used for X2 and X3 connections must have an adequate cross-section and minimum
isolation of 300V.
Key:
A30 - Smartech Plus Gateway
G4 - Gateway power supply unit
BR - Brown
BL - Blue
W - White
Y - Yellow
6
7
8