5.3 IO 113
IO 113 forms the interface between a Grundfos
sewage and wastewater pump with analog and digital
sensors, and a pump controller. The most important
sensor data are indicated on the front panel.
One pump can be connected to an IO 113 module.
Together with the sensors, the IO 113 forms a
galvanic separation between the motor voltage in the
pump and the controller.
IO 113 is able to:
• protect the pump against overheating
• monitor the moisture in the pump
• measure the stator insulation resistance. See
section Measurement of insulation resistance
• stop the pump in case of alarm
• remotely monitor the pump by RS-485
communication, Modbus or GENIbus
• control the pump by a frequency converter.
Combined with SM 113, IO 113 can monitor the
bearing temperature and rotor speed when the motor
is switched off.
Related information
5.3.2 Measurement of insulation resistance
5.3.1 Galvanic separation
Double-insulated sensors for all measurements of
high voltage to ensure electrical safety. The IO 113
has a galvanic separation.
5.3.2
Measurement of insulation resistance
IO 113 measures the insulation resistance between a
stator winding and earth:
• Resistance above 10 megaohms is acceptable.
• Resistance between 10 and 1 megaohms causes
a warning.
• Resistance below 1 megaohm causes an alarm.
5.4
SM 113, optional
SM 113 is designed and used for the collection and
transfer of additional sensor data. SM 113 works with
IO 113 with a communication module, product
number 98097390, as indicated below.
PET1 T2
G1 A1 G2 A2 K1 K2 R1 R2
D1 D2D3D4 D5D6 D7D8
P1 P2 P3 P4 P5
A Y B
I1 I2 I3
ON DIP
1 2 3 4 5 6 7 8 9 1011 12
1 2 3 4 5 6 7 8 9 10 111213 14
C
S
IO 113
SM 113
TM051966
IO 113 and SM 113
Pos. Description
C
Power line communication using Grundfos
GENIbus protocol
S Sensor inputs
SM 113 can collect data from the following devices:
• current sensors, 4-20 mA *
• Pt100 ** thermal sensors.
* Vibration sensor (FPV).
** Maximum three Pt100 sensors.
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