Sm 113, Optional; Switches And Sensors; Thermal Switches; Moisture Switch - Grundfos S2 Série Mode D'emploi

7.4 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
communication module, product number 98097390, as shown in the
figure below.
IO 113
T1 T2 G1 A1 G2 A2 K1 K2 R1 R2 PE
A Y B
D1 D2 D3 D4 D5 D6 D7 D8
1
ON DIP
1 2 3 4 5 6 7 8 9 10 11 12
P1 P2 P3 P4 P5 I1 I2 I3
IO 113 and SM 113
Pos. Description
Power line communication using Grundfos GENIbus
1
protocol
2 Sensor inputs
SM 113 can collect data from the following devices:
• Current sensors, 4-20 mA*
• Pt100**/ Pt1000*** thermal sensors.
*Vibration sensor, water-in-oil (WIO), or water-in-air (WIA) sensor
**Maximum three Pt100 sensors
***Maximum four Pt1000 sensors.

7.5 Switches and sensors

Do not let the pump run dry.
Install an additional level switch to ensure that the pump is stopped
in case the primary stop level switch is not operating.
A pump includes the following switches and sensors:
• three thermal switches in the stator windings
• one moisture switch in the top cover
• one moisture switch in the stator housing
• three thermal protectors in the stator windings:
- one analog Pt100 sensor in the stator winding
- one analog Pt100 sensor in the upper bearing
- one analog Pt100 sensor in the lower bearing
• one analog WIO sensor in the oil chamber.
1
8
Control cable
20
SM 113
1 2 3 4 5 6 7 8 9 10 11 1213 14
2
9 3
1 4
2
7
5
6
Pos. Description
1 Yellow and green
Sensor connections, SM 113 outside the motor
Pos. Description
A Power side
B Signal side
C "db" enclosure
WIO WIO sensor, "eb" and "mb" approvals
T Thermal switch
M

Moisture switch

P Power input
S Sensor input
SM 113 Sensor board
IO 113 IO 113 with internal alarm relay (250 VAC)

7.5.1 Thermal switches

The thermal protection against overheating is achieved with
bimetallic switches as standard or thermistors as optional. The
three thermal switches, that are hardwired from the pump to IO 113
or a similar controller, open in case the stator windings are
overheating. The thermal switches are reversible and close again if
the motor is cooled down.
This generates both a hardware and a software alarm in IO 113,
and the alarm relay opens.
Install an automatic circuit breaker, which disconnects the
power supply in case the thermal switches or the moisture
switches are not operating. The maximum switching
current for the thermal switch is 0,5A at cos φ 0.6.
7.5.2 Moisture switch
The pumps have two moisture switches, one below the motor top
cover and one in the stator housing. The moisture switches are
irreversible and must be replaced if activated.