Technical Data of the Analog Inputs¶
| Parameter | Value | ||
|---|---|---|---|
| Number of channels per module | 8 | ||
| Distribution of channels into groups | 2 groups of 4 channels each | ||
| Connections of the channels I0 to I3 | Terminals 1.0 to 1.7 and terminals 2.0 to 2.7 | ||
| Connections of the channels I4 to I7 | Terminals 3.0 to 3.7 and terminals 4.0 to 4.7 | ||
| Input type | Bipolar (not with current or Pt100/Pt1000/Ni1000/Cu50/resistor) | ||
| Galvanic isolation | Against internal supply and other modules | ||
| Configurability | Digital input, -50 … +50 mV, -500 … +500 mV, -1 … +1 V, -5 … +5 V, -10 … +10 V, 0 … +5 V, 0 … +10 V, -20 … +20 mA, 0 … 20 mA, 4…20 mA, Pt100, Pt1000, Ni1000, Cu50, resistor, thermocouple types J, K, N, S, T (each input can be configured individually) | ||
| Channel input resistance | Voltage: > 100 kΩ, current: ca. 330 Ω | ||
| Time constant of the input filter | Line-frequency suppression 50 Hz, 60 Hz, none | ||
| Indication of the input signals | 1 yellow LED per channel, the brightness depends on the value of the analog signal | ||
| Conversion time | 1 ms (none), 100 ms (60 Hz), 120 ms (50 Hz) per channel | ||
| Resolution | Range | unipolar | 15 bits |
| bipolar | 15 bits + sign | ||
| Conversion error of the analog values caused by non-linearity, adjustment error at factory and resolution within the normal range | Typ. | ± 0.1 % (voltage) ± 0.3 % (current, resistor) at 25% |
|
| Max. | ± 0.7 % (voltage) ± 0.9 % (current, resistor) ± 0.5 % (thermocouple) 1.0 K (resistance temperature detectors) at 0…60 °C or EMC disturbance |
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| Relationship between input signal and hex code | Table Input Ranges AI531 - Analog Input Module | ||
| Unused voltage inputs | Are configured as “unused” | ||
| Unused current inputs | Have a low resistance, can be left open-circuited | ||
| Input data length | 32 bytes | ||
| Overvoltage protection | Yes | ||