English (GB)
21
8.4 WIO sensor (water-in-oil sensor)
The WIO sensor measures the water content in the oil and
converts the value into an analogue current signal. The two
sensor conductors are for power supply and for carrying the
signal to the IO 111. The sensor measures the water content from
0 to 20 %. It also sends a signal if the water content is outside the
normal range (warning), or if there is air in the oil chamber
(alarm). The sensor is fitted in a stainless steel tube for
mechanical protection.
Fig. 11
WIO sensor
8.4.1 Fitting the WIO sensor
Fit the sensor next to one of the shaft seal openings. See fig. 11.
The sensor must be tilted into the motor's direction of rotation to
ensure that oil is led into the sensor. Make sure that the sensor is
submerged in the oil.
8.4.2 Technical data
See also the installation and operating instructions for IO 111 on
www.grundfos.com.
8.5 Moisture switch
The moisture switch is positioned in the bottom of the motor.
If there is moisture in the motor, the switch will break the circuit
and send a signal to the IO 111.
The moisture switch is non-reversing and must be replaced after
use.
The moisture switch is connected in series with the thermal
switch and connected to the monitoring cable, and it must be
connected to the safety circuit of the separate pump controller.
See section
8.6 IO 111
• The IO 111 forms interface between a Grundfos sewage or
wastewater pump with analogue and digital sensors and the
pump controller. The most important sensor data are indicated
on the front panel.
One pump can be connected to an IO 111.
Together with the sensors, the IO 111 forms a galvanic separation
between the motor voltage in the pump and the controller
connected.
IO 111 can distinguish between two categories of fault:
•
Alarm:
The pump stops. The fault is serious, such as too
high motor temperature.
•
Warning:
The pump does not stop. The fault is not serious,
such as too much water in the oil.
Fig. 12
IO 111
TM
0
4
5
2
38
2
909
-
TM
03
1
1
64
1
1
0
5
Input voltage:
12-24 VDC
Output current:
3.4 - 22 mA
Power input:
0.6 W
Ambient temperature:
0 to 70 °C
Caution
The motor-protective circuit breaker of the pump
controller must include a circuit which
automatically disconnects the power supply in
case the protective circuit for the pump is
opened.
T
M
03
0
6
9
1
05
05
Pos. Description
1
Terminal for alarm relay
2
Terminal for analog and digital inputs and outputs
3
Terminal for supply voltage (24 VAC / 24 VDC)
4
Potentiometer for setting the warning limit of stator
insulation resistance
5
Terminal for RS485
6
Red indicator light. Alarm in case of too high motor
temperature.
7
Indicator lights for stator insulation resistance.
Green = ok.
Yellow = warning.
Red = alarm.
8
Indicator lights for measurement of water in oil
9
Terminal for measurement of stator insulation resistance
10
Terminal for connection of pump sensors
11
DIP switch for configuration
12
Green indicator light. On when the pump is running.
13
Red indicator light. On in case of moisture in the motor
(alarm).
14
Button for reset of alarm
15
Yellow indicator light. On in case of pump fault (warning).
16
Terminal for digital outputs
Pos.
Symbol
Description
6
Stator temperature
7
Stator insulation resistance
8
Water in oil chamber
12
Pump running
13
Moisture in motor
15
Pump fault
Reset
PE
T1 T2
G1 A1 G2 A2 K1 K2 R1 R2
D1 D2 D3 D4 D5 D6 D7 D8
P1 P2 P3 P4 P5
A Y B
I1 I2 I3
ON
DIP
1 2 3 4 5 6 7 8 9 10
1
2
3
9
10
4
5
6
7
8
11
12
15
16
13
14
Summary of Contents for SL1.100.100.40.4
Page 39: ...Appendix 39 15 Exploded drawings SLV TM04 2777 2605...
Page 40: ...Appendix 40 SL1 TM04 2778 0904...
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