C h a p t e r 2 S p e c i f i c a t i o n s a n d S ys t e m C o n f i g u r a t i o n2 - 7 22_2.10 Extension Card Specifications2.10.1 General Specifications AS-F2ADTwo DC analog signal input channels:Item Voltage Input Current InputRated Input Range 0 V - 10 V 4 mA - 20 mAResolution 12-bit 11-bitDigital ConversionRange 0 - 4000 0 - 2000Hardware InputLimit*1 0V ~ +10.24V 4mA ~ 20.37mA (FW V1.00)3.63mA ~ 20.37mA (FW V1.20 or later)Digital ConversionLimit*2 0 ~ 4095 0 ~ 2047 (FW V1.00)- 48 ~ 2047(FW V1.20 or later)Error Rate room temperature: ±0.5% ; full temperature range: ±1.0%Input Impedance 2 MΩ 250 ΩConversion Time*3 3 ms / CHCharacteristicCurve10V40000Voltage inputDigital Value OutputCurr ent inputDigital Value O utput20mA20004Digital ValueOutput*4Card 1 SR168 (CH1), SR169 (CH2)Card 2 SR170 (CH1), SR171 (CH2)*1: The input signal should NOT exceed the limit. If exceeding the limit, damage may occur.*2: If the input signal exceeds the hardware input limit, the module only shows the maximum value. If the inputsignal is below the lower limit, it only shows the minimum value. If the input signal exceeds the hardware inputlimit, it also exceeds the digital conversion limit and a conversion limit error appears. For example in thecurrent input mode (4 mA to 20 mA), when the input signal is 0 mA, exceeding the hardware lower limit, it alsoexceeds the conversion lower limit. The module uses the lower limit value (-48) as the input signal. If adisconnected analysis is required, you can check if the digital conversion value is -48.*3: The conversion time is the time for each channel to convert signals to hardware input signals. If you needto calculate a complete conversion time, you need to add the PLC scan time.*4: Use the program to read the values in SR to obtain the corresponding A/D conversion value for thechannel.
