EGX150 Modbus Gateway- Maximum Supported Distance for Belden 9841 Cable

[shemil_usman]

Hi,

We have 3 generators to the looped and connected via Modbus port using Belden 9841 cable to EGX150 gateway.

The generators are far away from the Data Center at a distance of 600 meters.

The EGX150 will be installed in the Data Center rack and so please advise if this distance is supported, and that all parameters will be available without any disruption.

Thanks & Regards

Shemil

[Romain_Polette · Accepted solution]

Hi @shemil_usman , 

Link150 is not different than any other Modbus device.

You must respect some cabling rules / best practices:

https://electrical-engineering-portal.com/correct-cabling-modbus-rs485

https://www.se.com/ww/en/faqs/FA221785/

If you follow the wiring rules above, installing the Link150 600m far away from the Modbus Slaves (generators) should work fine.

regards, 

[Guillaume_Evrard · Accepted solution]

Hello,

depending on the size of the belden cable you can reach up to 1300m at 19200bps . Do not forget EOL resistance 

Pay attention to the Eart/ ground network as the cable is shielded, if you span over different grids you can face issues.

COMX wiring guide : DOCA0035EN is providing very good information on modbus wiring 

9841 (1 pair) is the Belden approved cable for modbus communication.