Woodward AtlasPC, Руководство по оборудованию

Страница: 74 / 134

AtlasPC Digital Control, Vol. I Manual 85586V1
66 Woodward
Accuracy
RTD and 4–20 mA Input Accuracy @ 25 °C (%)
Input type Typ Max
100 Ω American and European, 200 Ω American 0.05 0.10
200 Ω European 0.10 0.20
4–20 mA 0.05 0.10
Temp
Drift
Temperature Drift
Input Type Typ (ppm/°C) Typ error (%) Max (ppm/°C) Max error (%)
100 Ω European Curve 30 0.20 290 1.89
100 Ω American Curve 50 0.33 290 1.89
200 Ω European Curve
20 0.13 290 1.89
200 Ω American Curve 20 0.13 290 1.89
4–20 mA 105 0.68 160 1.04
For RTD inputs, percent error is for full scale for 65 degree delta
(25 to –40 °C). For 4–20 mA inputs, percent error is for 25 mA full
scale input for 65 degree delta (25 to –40 °C).
Update time 5 ms
I/O Latency 1 ms
Isolation All input channels are isolated from the rest of
the AtlasPC platform to 500 Vdc, however inputs
are not isolated from each other.
•
Loop power for the Analog inputs must be supplied by an external supply if
needed.
•
4–20 mA, or RTD is selected in the GAP block software, for each input.
GAP configuration sets input gain via software.
•
Maximum wire size, one 16 AWG (1.5 mm²), or two 20 AWG (0.5 mm²)
wires.
External loop powered transducers must be individually protected
with a 100 mA fuse on each channel.
Digital Speed Sensor Inputs
Number of channels 2, MPU only
MPU Inputs:
Input frequency 100—24 950 Hz
Minimum input amplitude See Figure 7-3.
Maximum input amplitude 70 V peak-to-peak
Input impedance >550 Ω
Isolation voltage 500 Vac, each channel is isolated from all other
channels, and from the AtlasPC platform
Resolution dependent on frequency, 13 bit minimum at
maximum speed
Accuracy less than ±0.08% of full scale from –40 to +85
°C internal temperature