Proline Promag 51
Technical data
Hauser
81
10.1.4
Output
Output signal
Current output
• Galvanically isolated
• Active/passive selectable:
– Active: 0/4 to 20 mA, R
L
<700
(for HART: R
L
250
)
– Passive: 4 to 20 mA, supply voltage V
S
18 to 30 V DC, R
i
150
)
• Time constant selectable (0.01 to 100 s)
• Full scale value adjustable
• Temperature coefficient: typically 0.005% o.f.s./°C, resolution: 0.5
μ
A
o.f.s. = of full scale value
Pulse/frequency output
• Galvanically isolated
• Passive: 30 V DC/250 mA
• Open collector
• Can be configured as:
– Pulse output
Pulse value and pulse polarity selectable, max. pulse width configurable (0.5 to 2000 ms)
– Frequency output
Full scale frequency 2 to 1000 Hz (f
max
= 1.25 Hz), on/off ratio 1:1, pulse width max. 10 s
Signal on alarm
Current output
Failsafe mode selectable (for example, according to NAMUR Recommendation NE 43)
Pulse/frequency output
Fallback value (only with certified pulse output)
Status output
"Non-conductive" in the event of a fault or power supply failure; switching response selectable
!
Note!
In custody transfer mode, error messages can be reset via the status input once the fault has been
cleared.
Resetting error messages
Load
See "Output signal"
Switch output
Status output
• Galvanically isolated
• Max. 30 V DC / 250 mA
• Open collector
• Configurable for: error messages, Empty Pipe Detection (EPD), flow direction, limit values
Low flow cut off
• Low flow cutoff
• Switch points permanently set (On at 0.02 m/s; Off at 0.04 m/s)
Galvanic isolation
All circuits for inputs, outputs, and power supply are galvanically isolated from each other.