Electrical Connections - Bühler technologies BCM-MS Guía Rápida

BCM-MS, BCM-LS
4.2 Installation
The sensor is a screw-in sensor with ¾" thread. The level
sensor must be screwed vertically into application tank from
above, the BCM-MS200 can either be installed sideways in the
tank or in a flow pipe using a line adapter.
Condition monitoring requires the bottom 5 cm of the sensor
to be bathed in oil for Level 200/375/615. The probe head of
the BCM-MS200 should always be in oil. Maximum pressure
and temperature ratings should generally be observed in the
sensor placement.
Screw the sensor into a prepared mount inside the tank. A
profiled sealing ring seals this from the oil side. To ensure
proper sealing, the seal face of the sensor mount should be
specially prepared and have a maximum roughness value of
R = 16. The tightening torque for the sensor is 45 Nm
max
±4.5 Nm.
Tank
Fig. 1: Installation options
Tank
Fig. 2: Installation options
To ensure proper function, please observe the following
guidelines related to sensor mounting position and location.
• To analyse an oil volume characteristic of the oil condi-
tion, the sensor should not be immediately in the oil
sump of the tank.
• For tank top installation, it will preferably be mounted
near the return or flushing pipe.
• Ensure the sensor is fully covered in oil regardless of the
system operating situation. Particularly note the varying
oil volume of the tank or potential inclination. Avoid foam
in the tank.
• When installing the return or flushing pipe, please note
the flushing pipe must not run dry in any operating situ-
ation.
• To avoid thermal factors as much as possible, the sensor
should not be installed in the immediate vicinity of hot
components and parts (e.g. motor).
• Varying oil temperatures are required to enable convert-
ing the characteristics to a reference temperature. The
greater the temperature fluctuations, the quicker the
temperature gradient can be determined.
10 Bühler Technologies GmbH
Line adapter
Item no.: 1590001005
Consumer
Pump
Tank
Tank
Fig. 3: Installation recommendations

4.3 Electrical Connections

WARNING
Faulty power supply
Danger to life – risk of injury
The device must be installed by an electrician.
Observe national and international regulations on the install-
ation of electrical equipment.
Power supply as per EN50178, SELV, PELV, VDE0100-410/A1.
To install, switch off the machine and connect the device as
follows:
Sensor cover top view
Fig. 4: Sensor plug pin assignment
The permitted operating voltage is between 9 V and 33 V DC.
The sensor cable must be shielded.
To ensure protective class IP67, only use suitable plugs and
cables. The tightening torque for the plug is 0.1 Nm.
4.3.1 Analog Current Outputs (4..20 mA) - Measurement
Without Load Resistor
The current should be measured with a suitable ammeter as
shown below.
Sensor cover top view
Fig. 5: Measuring the analog 4...20 mA outputs without load
resistances
Please refer to chapter Calibration for how to allocate the
measured current to the parameter.
Pin/assignment Standard cable colour
white
brown
green
yellow
grey
pink
blue
red
Housing/shield
BX150104 ◦ 03/2021