KROHNE H250 M8-M9-M10 EN - Manual (Page 31)

ELECTRICAL CONNECTIONS
4
31
H250
www.krohne.com 04/2011 - 4000269302 MA H250-R02 en
4.3.4 Indicator M9 - totalizer (ESK-Z)
The totalizer only works in conjunction with the ESK2A current output. A 6-digit display shows
the totalised flow value. It can be changed over to the instantaneous flow value in 0...100%.
A data backup is carried out automatically in the event of a power failure.
The counter is factory-set to the measuring range of the indicator. The total value can be read
directly.
Supply 11/12 and measured signals S+ and S- are not electrically isolated.
If the measured signal is not needed externally, a short-circuit jumper has to be connected to
terminals S+ and S-.
Pulse outputs P+ and P- are electrically isolated. A pulse is generated for each counter advance.
If the pulse output is not required, its terminals can remain unused.
A functional extra-low voltage with protective electrical isolation (PELV) in accordance with VDE
0100 Part 410 is required as a power supply. All the instruments (recorder, display, etc.)
connected to measuring circuits S+ and S- are connected in series. If this measuring circuit is
not needed, then a short-circuit jumper 3 required.
Figure 4-6: Counter connection
1 ESK - measurement signal 4...20 mA
2 Counter module
3 Transfer of the measurement signal or short-circuit jumper
4 Pulse output load
5 Counter power supply
6 Pulse output power supply
MA_H250_R02_en_269302_PRT.book Page 31 Tuesday, April 12, 2011 10:17 AM