KROHNE MFC 300 EN - Manual (Page 45)

ELECTRICAL CONNECTIONS
4
45
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 en
4.8.4 Control input
• All control inputs are electrically isolated from each other and from all other circuits.
• All operating data and functions can be adjusted.
• Passive mode: external power supply required:
U
ext
≤ 32 VDC
• Active mode: use of the internal power supply:
U
nom
= 24 VDC
• NAMUR mode: in accordance with EN 60947-5-6
(Active control input to NAMUR EN 60947-5-6: signal converter monitors cable breaks and
short circuits acc. to EN 60947-5-6. Errors indicated on LC display. Error messages possible
via status output.
• For information on the adjustable operating states refer to Function tables on page 79.
INFORMATION!
Depending on the version, the control inputs must be connected passively or actively or
according to NAMUR EN 60947-5-6! Which I/O version and inputs/outputs are installed in your
signal converter are indicated on the sticker in the cover of the terminal compartment.
INFORMATION!
For further information refer to Connection diagrams of inputs and outputs on page 49 and refer
to
Technical data on page 134.
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
.book Page 45 Monday, February 6, 2012 11:01 AM