Power supply in Modbus network

SORZOM

Member
Join Date
Nov 2007
Location
Irvine
Posts
7
Hi Everybody!

Do we always need dedicated power supply in a Modbus network? I'm going to design a Modbus network comprising 15 slaves connected to a AB Micrologix 1100 and couldn't find enough info from Modbus.org and Mirologix manual to verify whether or not I need a separate power supply.

Thanks in advance,
 
The confusion came from Modbus manual (Ver. V1-02 available on Modbus.org) where it says the 5..24 VDC power supply is an optional electrical interface which may be added in a 2-wire Modbus network.
 

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