AtlasPC Digital Control, Vol. I
Manual 85586V1
80
Woodward
Speed Bias Output
Number of channels
1
Current output option
4–20 mA selected by software switch and wiring
Max current output
25mA ±5%
Voltage output options
0–5 V (5 V max ±5%), ±3 V (±3V limit ±5%), 500 Hz
PWM, selected by software switch and wiring
Isolation 500
Vac
Max load resistance
300
Ω
at 24 mA for 4–20 mA output, infinite for V
outputs
Min load resistance
0
Ω
for current output, 450
Ω
for ±3 V output, 1k
Ω
for
0–5 V output, PWM output.
Resolution
11 bits, except for PWM output
Accuracy
less than ±0.1% of full scale @ 25 °C or
±0.006 V for ±3 V output
±0.005 V for 0–5 V output
±0.025 mA for 4–20 mA output
TempDrift
(4–20 mA, FS = 25 mA)
–40 to +85 °C
Any 40 °C change
Typical (1
σ
):
< 0.5% or 0.125 mA < 0.3% or 0.075 mA
Max (3
σ
):
< 1.2% or 0.30 mA
< 0.8% or 0.20 mA
Temp Drift
(±3V range)
–40 to +85 °C
Any 40 °C change
Typical (1
σ
):
< 0.3% or 18.0 mV
< 0.2% or 12.0 mV
Max (3
σ
):
< 0.7% or 42.0 mV
< 0.5% or 30.0 mV
TempDrift
(0–5 V range and PWM)
–40 to +85 °C
Any 40 °C change
Typical (1
σ
):
< 0.1% or 5.0 mV
< 0.1% or 5.0 mV
Max (3
σ
):
< 0.2% or 10.0 mV
< 0.2% or 10.0 mV
•
Options: 4–20 mA, 0–5 V, ±3V, PWM- 5V- 500 Hz. Both the GAP block field and the
wiring must be changed to switch between current and voltage outputs. Only the
GAP block field must be changed to switch between the voltage outputs.
Voltage Bias Output
Number of channels
1
Current output option
4–20 mA selected by software switch and wiring
Max current
25mA ±5%
Voltage output options
±1, ±3, ±9 V selected by software switch and wiring
Max Voltage
±9V ±5%
Isolation
see HAZARDOUS LIVE section above
Max load resistance
300
Ω
at 24 mA for 4–20 mA output, infinite for V
output
Min load resistance
7k
Ω
for ±9V output, 0
Ω
for 4–20 mA output
Resolution
11 bits for ±9V, >9 bits for ±3V, >7 bits for ±1V
Accuracy
less than ±0.1% of full scale @ 25 °C or
±0.018V for ±1V, ±3V, ±9V output
±0.025 mA for 4–20 mA output
Summary of Contents for AtlasPC
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