KROHNE OPTISWIRL 4070 EN - Manual (Page 35)

ELECTRICAL CONNECTIONS
4
35
OPTISWIRL 4070
www.krohne.com 02/2013 - 4000150606 MA OPTISWIRL4070C R07 en
4.3.1 Power supply
The required supply voltage can be calculated using the formula below:
U
ext.
= R
L
* 22mA + 14V
where
U
ext.
= the minimum supply voltage and
R
L
= the total measuring loop resistance is.
4.3.2 Totalizer / pulse output
The base units for the totalizer and the pulse output are m m m m 3 33 3 for volume,
m m m m 3 33 3 norm. norm. norm. norm. for standard volume and kg kg kg kg for mass.
The unit and the conversion factor can be changed in menu item 3.2.8 "Conf.Tot". User specific
units (User Def.) can also be entered but the conversion factor must always be entered based on
the base unit. For a sample calculation see chapter 6.2.5 "Change units".
The maximum frequency of the pulse output is 0.5 Hz.
INFORMATION!
The supply voltage has to be between 14 VDC and 36 VDC. This is based on the total resistance of
the measuring loop. To determine this, add up the resistances of each component in the
measuring loop (not including the measuring device).
INFORMATION!
The power supply has to be able to supply a minimum of 22 mA.
Figure 4-3: pulse output
1 f
max
≤ 0.5 Hz
2 closed
3 open
4 Pulse ≥ 250 ms
MA_OPTISWIRL4070C_R07_en_150606_PRT.book Page 35 Wednesday, February 13, 2013 2:47 PM