Selection Of Power Supply And Restrictions On Combination; Power Supply For Internal Circuit - Panasonic FP7 Series User Manual

Overview
1.4 Selection of Power Supply and Restrictions on
Combination

1.4.1 Power Supply for Internal Circuit

 Restrictions on combination of power supply for internal circuit and units
• Power for internal circuit is supplied from a power supply terminal of the power supply unit or
the CPU unit, or a power supply terminal of the expansion slave unit.
• Select units within the respective restrictions indicated below.
When a power supply unit is used
Select units so that the sum of internal current
consumptions of connected input/output units and
intelligent units does not exceed the capacity of the
power supply unit.
(Note 1) The allowable current without the power supply unit varies according to the model numbers of CPU unit.
Refer to the next page.
(Note 2) The allowable current of the expansion slave unit without the power supply unit is max. 3 A.
 Selection of a 24V DC power supply
• Select a power supply larger than the capacity of the units.In the minimum configuration,
select a power supply of 24 W or larger.
• In order to protect the unit against abnormal voltage from the power supply line, the power
supply should be an insulated type, and should be enclosed within a protective circuit.
• If using a power supply device without an internal protective circuit, always make sure power
is supplied to the unit through a protective element such as a fuse.
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When no power supply unit is used
Select units so that the sum of internal current
consumptions of connected input/output units and
intelligent units does not exceed max. 2 A or 3 A
(Note 1).