Technical Data of the Analog Inputs

Parameter		Value
Number of channels per module		4
Distribution of channels into groups		1 group with 4 channels
Connection if channels AI0+ to AI3+		Terminals 2.0 to2.3
Reference potential for AI0+ to AI3+		Terminal 2.4 (AI-) for voltage and RTD measurement Terminal 2.9, 3.9 and 4.9 for current measurement
Input type
	Unipolar	Voltage 0…10 V, current or Pt100/Pt1000/Ni1000
	Bipolar	Voltage -10…+10 V
Galvanic isolation		Against CANOPEN Bus
Configurability		0…10 V, -10…+10 V, 0/4…20 mA, Pt100/1000, Ni1000 (each input can be configured individually)
Channel input resistance		Voltage: > 100 kW Current: ca. 330 W
Time constant of the input filter		Voltage: 100 µs Current: 100 µs
Indication of the input signals		1 LED per channel (brightness depends on the value of the analog signal)
Conversion cycle		1 ms (for 4 inputs + 2 outputs); with RTDs Pt/Ni… 1 s
Resolution		Range 0…10 V: 12 bits Range -10…+10 V: 12 bits + sign Range 0…20 mA: 12 bits Range 4…20 mA: 12 bits Range RTD (Pt100, PT1000, Ni1000): 0.1 °C
Conversion error of the analog values caused by non-linearity, adjustment error at factory and resolution within the normal range		Typ. 0.5 %, max. 1 %
Relationship between input signal and hex code		Tables Input Ranges Voltage, Current CI581-CN and Digital Input and Input Range Resistor CI581-CN
Unused inputs		Are configured as “unused” (default value)
Overvoltage protection		Yes