Endress+Hauser Prosonic Flow 90, Operating Instructions Manual

Page: 38 / 114

4 Wiring Proline Prosonic Flow 90
38 Hauser
4.2.2 Terminal assignment
Terminal No. (inputs/outputs)
Order variant 20 (+) / 21 (–) 22 (+) / 23 (–) 24 (+) / 25 (–) 26 (+) / 27 (–)
90***-*********** W
− − −
Current output
HART
90***-*********** A
− −
Frequency output
Current output
HART
90***-*********** D Status input Status output Frequency output
Current output
HART
Status input (auxiliary input)
galvanically isolated, 3...30 V DC, R
i
= 5 k
Ω
Status output
Open Collector, max. 30 V DC / 250 mA, galvanically isolated
configurable for: error messages, flow direction, limit values
Frequency output (passive)
Open Collector, galvanically isolated, 30 V DC, 250 mA
– Frequency output: end frequency 2...1000 Hz (f
max
= 1250 Hz), on/off ration ~1:1, pulse width max. 2 s
– Pulse output: pulse value and pulse polarity selectable, pulse width adjustable (0.5...2000 ms)
Current output (active, passive)
galvanically isolated, active: 0/4...20 mA, R
L
< 700
Ω
(HART: R
L
≥
250
Ω
),
passive: 4...20 mA, max. 30 V DC, R
i
≤
150
Ω
,
Ground connection, power supply
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