Endress+Hauser Prosonic Flow 90, Руководство по эксплуатации

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10 Technical data Proline Prosonic Flow 90
96 Hauser
10.1.4 Output
Output signal Current output:
Active/passive selectable, galvanically isolated, time constant selectable (0.05...100 s),
full scale value selectable, temperature coefficient: typically 0.005% o.r./°C,
resolution: 0.5 µA.
• active: 0/4...20 mA, R
L
< 700
Ω
(for HART: R
L
≥
250
Ω
)
• passive: 4...20 mA, operating voltage 18...30 V DC, R
L
<
700
Ω
Pulse/frequency output:
Passive, open collector, 30 V DC, 250 mA, galvanically isolated.
• Frequency output: full-scale frequency 2...1000 Hz (f
max
= 1250 Hz),
on/off ratio 1:1, pulse width max. 10 s
• Pulse output: pulse value and pulse polarity selectable, max. pulse width adjustable
(0.05...2000 ms), above a frequency of 1 / (2x pulse width) the on/off ratio is 1:1.
Signal on alarm • Current output
→
failsafe mode selectable (e.g. in accordance with NAMUR
Recommendation NE 43)
• Pulse/frequency output
→
failsafe mode selectable
• Status output
→
“not conductive” in the event of fault or power supply failure
Detailed data
→
Page 86
Load see “Output signal”
Switching output Status output:
Open collector, max. 30 V DC / 250 mA, galvanically isolated
Configurable for: error messages, flow direction, limit values
Low flow cutoff Switch points for low flow cutoff are selectable
Galvanic isolation All circuits for inputs, outputs, and power supply are galvanically isolated from each other.