KROHNE BW 25 Ex II 1-2 G EN - Manual (Page 11)

DEVICE DESCRIPTION
2
11
BW25
www.krohne.com 03/2010 - 4000862901 MA BW25-Ex-II1/2G-AD R01 en
2.8 Electrical data
BW25/.././M9./../ BW25/.././M9./../ BW25/.././M9./../ BW25/.././M9./../…/.. /.. /.. /..
The electronic signal output ESK and the limit switch may only be connected to intrinsically safe
circuits.
Maximum values shall be maintained for the isolated circuits and the following
reactances shall be taken into consideration:
BW25/.././M10 BW25/.././M10 BW25/.././M10 BW25/.././M10
Circuit U
i
I
i
P
i
C
i
L
i
ESK2A 30 VDC 100mA 1W ≈20 nF ≈0 μH
ESK3-PA 24 VDC FISCO- Field Device
SC3,5-N0-Y.. 16 VDC 25mA 64mW 150nF 150 μH
I7S23,5-N...
SJ3.5-SN 16 VDC 25mA 64mW 30nF 100 μH
SJ3.5-S1N
When connecting the I/O interfaces for BW25/.././M10 liquid level indicators, the following data
shall be taken into account:
Only for connection to circuits with "protected extra-low voltage (PELV)" .
For nominal values I/O function and nominal values of the non-certified slave see BW25
handbook.
AD_BW25_II1_2G_R01_en_4000862901_PRT.book Page 11 Monday, July 1, 2013 10:00 AM