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Introduction 1
1-1
1. Introduction
The FX
2N
-8AD analog input block (hereafter referred to as "FX
2N
-8AD") converts 8 points of
analog input values (voltage input, current input and temperature input) into digital values, and
transfers them to the PLC main unit.
The FX
2N
-8AD can be connected to FX
0N
, FX
1N
, FX
2N
and FX
2NC
Series PLC.
1) Analog inputs can be selected from the voltage input, the current input and the thermocouple
input (temperature input) by the input mode setting by the TO instruction given by the PLC
main unit and the connection method.
At this time, a different analog input can be selected for each channel.
2) The voltage input can be selected within the range from -10 to +10 V. The current input can
be selected within the range from -20 to +20 mA and from +4 to +20 mA. The input
characteristics can be adjusted for each channel (except while the analog value direct
display is used).
The thermocouple input can be selected among the K type, J type and T type. (The input
characteristics cannot be adjusted when the thermocouple input is used.)
3) The resolution is 0.63 mV (20 V
×
1/32,000) or 2.50 mV (20 V
×
1/8,000) when the voltage
input is used, 2.50
µ
A (40 mA
×
1/16,000) or 5.00
µ
A (40 mA
×
1/8,000) when the current
input is used, and 0.1
°
C when the thermocouple input is used.
FX2N-8AD Analog input block