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5.1.6 PVS3
The PVS3 sensor is intended for use in medium- and large-sized
Grundfos wastewater products.
The sensor monitors the vibration level of the pump in order to
protect the pump and the pipe system from damage. Any change
in the vibration level is an indication of an abnormal situation. The
reason for this can be a clogged impeller, worn bearings, closed
outlet valve, etc. indicating that a service inspection must be
carried out before the pump or the pipe system is damaged.
The sensor is a 2-wire 4-20 mA transmitter consisting of the
following main sections:
•
3-axes, 2g linear accelerometer with digital interface
•
8-bit micro controller
•
output current generator.
The micro controller reads the digital output of the accelerometer
at 640 Hz sampling rate per axis, and processes the 3-axes
acceleration data into an analogue 4-20 mA output proportional to
the RMS value of the total velocity.
The PVS3 sensor is designed for mounting in the junction box of
the pump motor and must be firmly mounted on the pump
structure with a tight connection on an even surface.
Output
< 3.5 mA
4-20 mA
> 20 mA
Technical data
Measuring frequency:
2-160 Hz
Supply voltage:
12-28 VDC, PELV
Breakdown voltage:
± 30 VDC
Ambient temperature:
32-158 °F (0-70 °C)
Electrical connection
A 2-wire screened cable is permanently connected to the sensor:
Brown wire:
Positive supply
White wire:
Negative supply
Screen:
To be connected to ground.
16
5.1.7 IO 113
IO 113 provides the interface between the pump equipped with
sensors and the pump controller(s). The most important sensor
status information is indicated on the front panel.
Only one pump can be connected to one IO 113.
Together with the sensors, IO 113 provides a galvanic isolation
between the motor voltage in the pump and the connected
controller(s).
IO 113 can do the following as standard:
•
•
•
•
•
•
When IO 113 is combined with SM 113, it is also possible to
monitor the following:
Signal type
Failure
0-20 mm/s RMS
Alarm
5.1.8 SM 113
SM 113 is designed and used for the collection and transfer of
additional sensor data. SM 113 works together with IO 113. IO
113 is available with or without communication module.
SM 113 is built into the top cover of the pump.
SM 113 can collect data from these devices:
•
•
*
** Maximum four Pt1000 sensors
Protect the pump against overheating.
Monitor the status of these items:
– motor winding temperature
– leakage
– moisture in pump.
Measure the stator insulation resistance.
Stop the pump in case of alarm.
Remotely monitor the pump via RS-485 communication
(Modbus or GENIbus).
Control pump via a frequency converter.
– Bearing temperature
– vibrations in pump
– rotor speed when the motor is switched off.
IO 113
Power-line
communication
using Grundfos
T1 T2
G1 A1 G2 A2 K1 K2 R1 R2
PE
GENIbus
D1 D2 D3 D4 D5 D6 D7 D8
A Y B
protocol
ON
DIP
1 2 3 4 5 6 7 8 9 10 11 12
P1 P2 P3 P4 P5
I1 I2 I3
Current sensors, 4-20 mA
Pt100*/Pt1000** thermal sensors
Maximum three Pt100 sensors
SM 113
1 2 3 4 5 6 7 8 9 1011 1213 14
Sensor inputs
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