Woodward AtlasPC, Руководство по оборудованию

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Manual 85586V1 AtlasPC Digital Control, Vol. I
Woodward 67
100 10000 15000 20000 25000 30000
Frequency (Hz)
M
inim
u
m
M
P
U
M
agnitude (V
olts R
M
S
)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Figure 7-3. Minimum MPU Voltage
•
A derivative output is provided. The inherent noise on this output, due to
resolution, increases with frequency. At 1000 Hz, it can be as much as 2.5
Hz/sec. At 5000 Hz, it can be as much as 12.5 Hz/sec. At 10 kHz, it can be
as much as 25 Hz/sec. At 20 kHz, it can be as much as 80 Hz/sec.
Typically, at 3600 Hz, noise on the MPU signal due to wiring runs, will make
the noise contribution due to resolution, insignificant.
•
Maximum wire size, one 16 AWG (1.5 mm²), or two 20 AWG (0.5 mm²)
wires.
Analog Outputs
Number of channels 2
Output type 4–20 mA outputs, non-isolated
Current output 4–20 mA
Max current output 25mA ±5%
Isolation 0 Vdc
Min. load resistance 0 Ω
Max load resistance 300 Ω at 22 mA
Resolution 12 bits
Accuracy less than ±0.1% of full scale at 25 °C (after
software calibration)
Temperature drift 140 ppm/°C, maximum, =0.23 mA
70 ppm/°C, typical (0.45% of full scale),
=0.11375 mA
•
0–1 mA OUTPUTS ARE NOT SUPPORTED, WITHOUT A GREATER
THAN 4 BIT LOSS OF RESOLUTION. RESULTING RESOLUTION WOULD
BE 7 BITS.
•
Common mode voltage is 15 Vdc.
•
Maximum wire size, one 16 AWG (1.5 mm²), or two 20 AWG (0.5 mm²)
wires.