FX Series Programmable Controllers Assigning System Devices 9
9-2
9.2 Using The FX2-24EI With F
Series Special Function Blocks
The FX
2
-24EI allows an FX base unit to be directl
connected to an one of the followin
F
series special function blocks:
a) The F-16NT/NP, a Melsec Net Mini interface
b) The F2-6A, a combine analo
4 input and 2 output unit
c) The F2-32RM, a pro
rammable CAM sequencer
d) The F2-30GM, a pulse train positionin
unit
One 24EI unit can control one F series special function unit.
• The ‘24EI’ units are added to an FX s
stem in the same manner as an additional discreet
I/O module. Each 24EI occupies 16 input points and 8 output points, the dia
ram below
illustrates this point. Experienced users ma
notice that the example shown in the
dia
ram below would require too much power from the CPU unit (FX-48MR in this case)
based on the I/O count.
This is not the case. The FX2-24EI is reall
a communications module. It does not
directl
drive an
discreet I/O. For the sake of power calculations it can be assumed that
it onl
occupies 8 standard I/O points. This means that the confi
uration shown in the
dia
ram actuall
occupies 32 points (three FX2-24EI’s and one FX-8EX) of I/O for the
sake of power consumption calculations BUT actuall
occupies 80 points of addressable
I/O.
Connection Of Earth Points When Using F Series Special Function Blocks
• When usin
the F series special function blocks the special function blocks earth
terminal should be connected to the [SG] terminal of the FX CPU unit. However, when
usin
the F-16NP/NT unit the [SG] terminal of the F-16NP/NT should on
NO
account be
connected to the [SG] terminal of the FX. The function of these terminals are completel
different and are hence
NOT
compatible.
POWER
FX -24EI
2
POWER
FX -24EI
2
POWER
FX -24EI
2
POWER
FX-8EX
X30-47
Y30-37
X40-57
Y40-47
X50-57
Y50-57
X110-
Y117
Inputs X0-27
FX-48MR
Outputs Y0-27
