KROHNE H250 M8-M9-M10 EN - Manual (Page 39)

ELECTRICAL CONNECTIONS
4
39
H250
www.krohne.com 04/2011 - 4000269302 MA H250-R02 en
4.4.4 Switching output B2 as a pulse output
Pulse output B2 is a passive "open collector" output which is electrically isolated from the
current output and output B1. It can be operated as a low-resistance output or as a NAMUR
output.
The pulse width t
on
can be configured from 30...500 ms in the menu of the indicator.
INFORMATION!
When switching output B2 is used as a pulse output, two separate signal circuits are required.
Each signal circuit requires its own power supply.
The total resistance 3 must be adapted so that the total current I
tot
does not exceed 100 mA.
Figure 4-12: Electrical pulse output
1 Terminal B2
2 Terminal I
3 Load e.g. counter
4 Flow rate measurement 4...20 mA
5 Pulse output power supply
6 M10 power supply
Figure 4-13: Data pulse output
1 f
max
= 10 Hz
2 t
on
3 t
off
MA_H250_R02_en_269302_PRT.book Page 39 Tuesday, April 12, 2011 10:17 AM