Rockwell Automation Publication ENET-UM004B-EN-P - November 2015 13
5000 Series EtherNet/IP Communication Module Overview Chapter 1
You connect external power supplies to removable terminal blocks (RTBs) to
provide MOD power and SA power.
For more information on how to connect MOD power and SA power, see the
5069 Compact I/O EtherNet/IP Adapter Installation Instructions, publication
5069-IN003.
MOD Power
MOD power is system-side power that lets 5069 Compact I/O modules transfer
data and execute logic.
5069 Compact I/O System MOD Power Bus
When the MOD power source is turned on, that is, a 5069 Compact I/O system
receives system-side power, the following occurs.
1. The 5069-AEN2TR EtherNet/IP adapter draws current from the MOD
power bus current and passes the remaining current through to the next
module.
2. The next module draws MOD power bus current and passes the remaining
current through to the next module.
3. The process continues until MOD power bus current needs are met for all
modules in the system.
For more information on the current that the 5069 Compact I/O modules draw
from the MOD power bus, see the 5069 Compact I/O Modules Specifications
Technical Data, publication
5069-TD001.
IMPORTANT
We recommend that you use separate external power supplies for MOD power
and SA power respectively. This practice can prevent unintended consequences
that can result if you use one supply.
If you use separate external power supplies, the loss of power from one
external power supply does not affect the availability of power from the other
supply. For example, if separate external power supplies are used and SA power
is lost, MOD power remains available for the 5069 Compact I/O modules.
IMPORTANT
Remember the following:
• A 5069 Compact I/O system includes only one MOD power bus.
• You must limit the MOD power source to up to 10 A, max, at 18…32V DC.
We recommend that you use an external MOD power supply that is
adequately sized for the total MOD power bus current draw. For example, if
the total MOD power current draw is 5 A, you can use a MOD power supply
that is limited to 5 A at 18…32V DC.
• The MOD power source must meets the 5069 Compact I/O system
inrush requirements.
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