Hydrocal M3 User Manual v1.8
ENG - 9
M-BUS NETWORK CONNECTION
The inputs/outputs “M-Bus” (24 and 25) are dedicated to the meter connection with an M-Bus network
cable.
For the connection is not necessary to respect the polarity, although it is advisable to keep the same
polarity on the entire cable network.
Warning: the M-Bus network is using voltage that can damage the device when applied to terminals
dedicated to other functions, so be careful when connecting to this interface.
PULSE OUTPUT CONNECTIONS
The meter is equipped with an Open-Collector pulse output (30V):
- heating units output: ENERGY OUT (16, 17)
These outputs can be connected to a compatible totalizer or to a signal converter.
