ProMinent Sigma 3 Basic Operating Instructions Manual page 21

Namur sensor (Specified for EX zones)
Motor design V2 (motor with integrated
frequency converter)
Inspection, daily
Maintenance
Interval
After 18,000 operating hours or 23,500 oper‐
ating hours (API)
When a frame is used, a motor screw is factory-connected by a protective
earth cable to the earthing point.
5–25 V DC, in accordance with Namur or DIN 19234, potential-free
design.
Data
Rated voltage *
Power consumption - active surface
uncovered
Power consumption - active surface cov‐
ered
Rated switching distance
* Ri ~ 1 kΩ
Cable colour Polarity
blue -
brown +
Install the sensor in accordance with the chapter "Instal‐
lation, electrical". Refer to its documentation.
Sensor name: NJ1.5-8GM-N.
Changing the motor voltage and pulse frequency is not permitted.
The motors can be operated within a frequency range of 2 Hz (limited
torque) to 100 Hz.
The pulse frequency of the frequency converter is 4 kHz.
Check the pump installation for:
Leaks
n
Abnormal noises or squeaks
n
Abnormal temperatures
n
Abnormal odours
n
Abnormal vibrations
n
Other anomalies
n
WARNING!
Stop the pump immediately in the event of any anoma‐
lies when inspecting the pump and rectify them immedi‐
ately. ProMinent Service may be needed if required.
Maintenance work
Adhere to the motor manufacturer's recommendations - see oper‐
ating instructions for the motor.
After 40,000 h: The upper screw shaft bearing must be replaced for
ongoing ATEX use.
Safety chapter
Value Unit
8 VDC
> 3 mA
< 1 mA
1.5 mm
21