Table of Contents
Advertisement
Proline Prosonic Flow 91
Output signal
Signal on alarm
Load
Low flow cut off
Galvanic isolation
Electrical connections
Supply voltage
(power supply)
Cable entry
Cable specifications
Power consumption
Power supply failure
Potential equalization
Endress+Hauser
10.1.4
Output
Current output
• Galvanically isolated
• Full scale value adjustable
• Temperature coefficient: typ. 2 μA/°C, resolution: 1.5 μA
• Active: 4 to 20 mA, R
< 700
L
Pulse/status output:
• Galvanically isolated
• Open collector
• 30 V DC / 250 mA
• Passive
• Can be configured as:
– Pulse output: pulse value and pulse polarity can be selected, max. pulse width adjustable
(5 to 2000 ms), pulse frequency max. 100 Hz
– Status output: for example, can be configured for error messages, empty pipe detection, flow
recognition, limit value
• Current output, pulse output → Failsafe mode can be selected → ä 99
• Status output → "Not conductive" in the event of fault or power supply failure
See "Output signal"
Low flow cut off → Switch-on point can be selected as required
All circuits for inputs, outputs and power supply are galvanically isolated from each other.
10.1.5
Power supply
See → ä 22
Transmitter
85 to 250 V AC, 45 to 65 Hz
20 to 28 V AC, 45 to 65 Hz
11 to 40 V DC
Sensor
Powered by the transmitter
Power supply and signal cables (inputs/outputs):
• Cable entry M20 × 1.5 (8 to 12 mm; 0.31 to 0.47 in)
• Thread for cable entries ½" NPT, G ½"
See → ä 23
85 to 250 V AC: < 12 VA (incl. measuring sensor)
20 to 28 V AC: < 7 VA (incl. measuring sensor)
11 to 40 V DC: < 5 W (incl. measuring sensor)
Lasting min. 1 power cycle.
HistoROM/T-DAT save measuring system data if the power supply fails.
For potential equalization, no special measures are necessary.
Ω
(for HART: RL ≥ 250 Ω)
Technical data
61
Advertisement
Table of Contents
