KROHNE BM 90 EN - Manual (Page 6)

6
2. Installation
The installation of the Level-Sonic BM90 unit is straight
forward, providing the guidelines in this chapter are fol-
lowed.
2.1. Converter
The BM90 / L unit (Fig 1) must be mounted on a flat sur-
face secured by the 3 mounting holes.
For the BM90 E/LE, see panel cut out figure 5.
When mounting the unit avoid vibration or close proximity
to high voltage cables, contactors and drive controls. The
unit should not be mounted in direct sunlight or in a con-
fined space where temperatures may exceed the normal
working temperature. If the unit is mounted outside it
must be protected from severe weather conditions.
Note : Electrical Connection
Converter instrument has 2 covers, the bottom one with 2
screws is protecting terminals. See Fig. 6 for the wiring
diagram. Replace cover after completion of wiring.
Note : Select the correct working voltages for AC
On converter instrument the voltage selector switch is on
the left hand side of the bottom PCB.
Note : If DC power supply is required, instruments will be
marked accordingly.
NOTE : There is no need to remove the upper cover. If
you need to access to the RS232 or RS485 terminal for
the BM90E then you have to open it.
IN THIS EVENTUALLITY, PLEASE REMOVE IT GEN-
TLY, A FLAT CABLE IS ATTACHED TO THE COVER.
TAKE CARE NOT TO DESTROY IT.
2.1.1 BM90 / L Wall mounted converter
Fig 1: