Issue:
What is the recommended cable for MBUS connection of Power meters?
Environment
Power meters "supporting MBUS"
Resolution:
We don't have any special requirements for MBUS so all guidelines from MBUS corporation are applied.
You can find that on this link
https://m-bus.com/documentation-wired/04-physical-layer
If you browse this guide you will find an example of recommended cable type and maximum distance.
Here is a quotation from MBUS website
A two-wire standard telephone cable (JYStY N20.8 mm) is used as the transmission medium for the M-Bus. The maximum distance between a slave and the repeater is 350 m; this length corresponds to a cable resistance of up to 29 W . This distance applies for the standard configuration having Baud rates between 300 and 9600 Baud, and a maximum of 250 slaves. The maximum distance can be increased by limiting the Baud rate and using fewer slaves, but the bus voltage in the Space state must at no point in a segment fall below 12 V, because of the remote powering of the slaves. In the standard configuration the total cable length should not exceed 1000 m, in order to meet the requirement of a maximum cable capacitance of 180 nF.
What is the recommended cable for MBUS connection of Power meters?
Environment
Power meters "supporting MBUS"
Resolution:
We don't have any special requirements for MBUS so all guidelines from MBUS corporation are applied.
You can find that on this link
https://m-bus.com/documentation-wired/04-physical-layer
If you browse this guide you will find an example of recommended cable type and maximum distance.
Here is a quotation from MBUS website
A two-wire standard telephone cable (JYStY N20.8 mm) is used as the transmission medium for the M-Bus. The maximum distance between a slave and the repeater is 350 m; this length corresponds to a cable resistance of up to 29 W . This distance applies for the standard configuration having Baud rates between 300 and 9600 Baud, and a maximum of 250 slaves. The maximum distance can be increased by limiting the Baud rate and using fewer slaves, but the bus voltage in the Space state must at no point in a segment fall below 12 V, because of the remote powering of the slaves. In the standard configuration the total cable length should not exceed 1000 m, in order to meet the requirement of a maximum cable capacitance of 180 nF.
Released for:Schneider Electric Saudi Arabia
