FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
102
6 Examination of System Configuration
6.8 Number of Input/Output (Occupied) Points and Current Consumption
6.8 Number of Input/Output (Occupied) Points and Current Consumption
The following tables show the number of input/output points or the number of input/output occupied points for
each type of device, along with the power supply type and current consumption values needed for selecting a
product.
• Number of input/output points or input/output occupied points on each type of device
• Output current of 5V DC power supply and 24V DC service power supply
*1
of main unit and input/output
powered extension units
• Current consumed by expansion boards, special adapters, input/output extension blocks, special function
units/blocks and display module
*1. The DC power type main unit does not have a 24V DC service power supply. Instead, it has an
internal 24V DC power supply.
The current consumption is determined differently in the following cases.
• 5V DC and internal 24V DC are supplied to the products through an extension cable, and the current
consumption must be calculated
Subtract the current consumption at the internal 24V DC as follows.
- For the AC power type main unit, subtract the current consumption at the internal 24V DC from the 24V
DC service power supply.
- For the DC power type main unit, subtract the current consumption at the internal 24V DC from the
power supply for the internal 24V DC.
• The special function units/blocks connected to the AC power type main unit or to the 24V DC service
power supply terminal of the input/output powered extension unit consume the external 24V DC. Include
the current in the calculation of current consumption.
When the terminal is connected with an external power supply, the current is not included in the calculation
of current consumption.
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