DL205 Analog Manual, 7th Edition Rev. D
15-3
Chapter 15: F2-8AD4DA-1 8-Ch. In / 4-Ch. Out Analog Current Combination
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The following tables provide the specifications for the F2-8AD4DA-1 Analog Current Input/
Output Module. Review these specifications to be certain that it will meet the requirements
of your application.
NOTE: The values listed for Sample Duration Time and Conversion Time are for a single channel, and do not include PLC
scan times.
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Input Specifications
Number of Input Channels
8, single ended (one common)
Input Range
0–20 mA
Input Resolution / Value of LSB
12, 14, or 16 bit; selectable
12 bit, 0–20 mA = 4.88 μA
14 bit, 0–20 mA = 1.22 μA
16 bit, 0–20 mA = 0.305 μA
Input Impedance
100q, ±0.1%, 1/4W
Maximum Continuous Overload
±45mA
Loop Supply Voltage Range
18–26.4 VDC
Filter Characteristics
Active low pass; -3 dB @ 80Hz
PLC Input Update Rate
8 channels per scan (max. with pointers; local base)
Sample Duration Time (note)
2ms @ 12 bit; 5.52ms @ 14 bit; 23ms @ 16 bit
Conversion Time (note)
12 bit =1.5ms per channel
14 bit = 6ms per channel
16 bit = 25ms per channel
Conversion Method
Over sampling successive approximation
Accuracy vs. temperature
25ppm / °C maximum
Input Stability and Repeatability
± 0.025% of range (after 30 minute warm-up)
Input Inaccuracy
0.1% of range maximum
Linearity Error (end to end)
12 bit = ±2 counts max. (± 0.06% of range)
14 bit = ±10 counts max. (± 0.06% of range)
16 bit = ±40 counts max. (± 0.06% of range)
Monotonic with no missing codes
Full Scale Calibration Error
(not including offset error)
±0.07% of range maximum
Offset Calibration Error
±0.03% of range maximum
Common Mode Rejection
-90dB min. @ DC; -150dB min. @ 50/60Hz
Crosstalk
±0.025% of range max. @ DC, 50/60Hz
Recommended External Fuse
0.032A, series 217 fast-acting, current inputs
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