OSTBERG HERU 400-2400 S, User Manual, Page: 68 / 120

68 / 120
Climatix HERU® 400-2400 2018-02-13
Modbus pressure sensor for pressure regulation
Assembly
To obtain the desired IP rating, the differential pressure sensor must be mounted
vertically (connection fittings downward). The connection fittings must also be located
higher than the measuring tube at the air duct.
When the connection fittings are pointed upward, or if these are lower than the
measuring tube, condensation water can collect in the sensor and cause damage.
Pressure regulation, addressing of pressure sensor
When using Modbus signal for pressure sensors, the pressure range does not need to
be adjusted. Modbus handles this via the data signal. The measuring range is only used
when the 0-10 V signal is used.
Description I/O designation
Type of function
Pressure sensor
unit I/O-
type
Pxxx x40x xxx1
Supply air
pressure, GP1
QBM68.2525 P401 Pressure MB address 40 1=P1
Extract air
pressure, GP2
QBM68.2525 P402 Pressure MB address 40 2=P2
Important!
1
2
3
4
5
6
7
8
O
N
1
2
3
4
O
N
A
B