Mitsubishi FX3U SERIES User Manual page 85

FX Series Programmable Controllers
3U
User's Manual - Hardwaer Edition
3
Calculation of current consumption
The power is supplied to each connected device from the built-in power supply of the main unit, the input/
output powered extension unit or the extension power supply unit.
There are three types of built-in power supplies; 24V DC service power, 5V DC power and internal 24V DC
power. The power to be consumed varies depending on the type of product to be added.
Expansion
Special
adapter board
Power supply
from main unit
Refer to Section 6.5.
* When connecting an input extension block on the downstream side of an extension power supply unit,
supply the power to the input extension block from the nearest main unit on the upstream side, or from an
input/output powered extension unit on the upstream side of the extension power supply unit.
In the example above, the input/output powered extension unit supplies the power to extension blocks.
→ For details, refer to Section 6.5 "Expansion of Main Unit (Calculation of Current Consumption)".
→ For details, refer to Section 6.6 "Expansion of FX2N Series I/O Powered Extension Unit (Calculation
→ For details, refer to Section 6.7 "Expansion of Extension Power Supply Unit (FX3U-1PSU-5V)".
Extension block
Main unit (some blocks can
be connected)
Power supply
from main unit
6 Examination of System Configuration
Input/output
Extension block
powered
(some blocks can
extension
be connected)
unit
Power supply from
input/output powered
extension unit
Refer to Section 6.6.
6.2 Rules of System Configuration
Extension Extension block
power supply (some blocks can
unit be connected)
Power supply from
extension power supply
unit*
Refer to Section 6.7.
of Current Consumption)".
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