Intelligent Technologies Modbus to QCPort Adapter Manual
January 2006
MN05002002E (C)
For more information visit
www.eatonelectrical.com
Page 12
Power Supply Requirements
Power from multiple sources is required for operation of the Modbus Adapter. The
Modbus Adapter CPU operates from power supplied on QCPort Channel A. The
isolation between QCPort and Modbus is performed at the Modbus communication
processor. This processor requires some power from Modbus to operate.
Table 9: Modbus Adapter (D77D-EMA) Power Isolation
Modbus
RS485
CHA
CPU
CHB
Power Supply
Isolation
Ethernet
10Bast T