Immergas VICTRIX PRO V2 - 5.20 Wiring diagram connection to BMS (Simple cascade)

≤ 2 m
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Key: A4 - Display board A38 - Connection card (signals) 1 - BMS (Modbus master) 2 - Master generator 3 - Slave generator 4 - Slave generator (last appliance) 5 - Data + 6 - Date -
SIMPLE CASCADE
Cable type: 2 x double braided (20 / 22 AWG) Note: in one pair connect the 'DATA +' and 'DATA -' signals, in the other pair connect the 'GND'
Cable type (BMS): twisted pair (20 / 22 AWG)
BUS: Modbus parameters can be found in the 'TECHNICIAN/ SYSTEM SETTINGS/Modbus parameters' MENU The parameter 'Heating request type' must be set as 'Room thermostat setpoint' (default value)
Modbus parameters have no eect on the Simple cascade Remove jumper X40
It is possible to connect the following sensors to the Master appliance and read them via BUS: - System ow probe (B1-2) - External probe (B4) - DHW probe (B2) - DHW ermostat/Contact (S50)
5.20 WIRING DIAGRAM CONNECTION TO BMS SIMPLE CASCADE
BMS: on one side of the bus, there must be a pull up resistance and a pull down resistani- ce. e diagram assumes that the two pull up and pull down resistances are already present in the external device (box 1 in the gure 34); if these resistances are not present on the external device, it is necessary to make the link between the TR+ terminals with T+ and TR- with T-, so as to use the pull up and pull down resistances already present on the display board (A4). e termination resistance (120 ohm) is required on both sides of the BUS; to achieve this, the installer must t the 120 ohm resistance (not supplied) on the external device (box 1 in g. 34) and then make the link between the TRD and T- terminals, so as to use the resistance already present on the display board (A4).