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The FX-4AD analog special function block has four input channels .The input channels receive
analog signals and convert them into a digital value.This is called an A/D conversion.The FX-4AD
has a maximum resolution of 12 bits.
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The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V
DC (resolution: 5mV), and/or 4 to 20mA, -20 to 20mA (resolution: 20
µ
A) may be selected.
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FX PC versions 2.0 or later (those with serial number 13OOOO or larger) are required as these
units have the TO/FROM applied instructions in their instruction set. Data transfer between the FX-
4AD and the FX base unit is by buffer memory exchange. There are 32 buffer memories (each of
16 bits) in the FX-4AD.
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The FX-4AD occupies 8 points of I/O on the FX, FX
2C
expansion bus. The 8 points can be allocated
from either inputs or outputs. The FX-4AD draws 30mA from the 5V rail of the FX base unit or
powered extension unit.
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX-4AD special function block and should be read and understood before attempting
to install or use the unit.
Further information can be found in the FX PROGRAMMING MANUAL and FX SERIES HARDWARE
MANUAL.
INTRODUCTION
1
USER'S GUIDE
JY992D52601E
FX-4AD
SPECIAL FUNCTION BLOCK
