English (GB)
19
Fig. 22
Electrical connection of the electronics
9.2.6 Screwing the sensor into the dosing head
• Screw the sensor from the lower side into the hole of the
dosing head flange (M14 x 1.5).
– Now the diaphragm leakage sensor is ready for start-up.
9.2.7 Start-up
Functional check
• Dip the sensor into water.
– Green and red LEDs are on:
Sensor and electronics are ready for operation!
– One or more LEDs are off:
Sensor or electronics is defective!
Call Grundfos service.
• Carefully dry the sensor.
– Only the green LED is still on:
Sensor and electronics are ready for operation!
– The red LED is still on:
Sensor or electronics is defective!
Call Grundfos service.
9.2.8 Using the contacts
• Terminals 6 and 7 (potential-loaded)
– for instance for switching off the pump in case of a
diaphragm leakage.
• Terminals 8, 9 and 10 (potential-free)
– for instance for triggering an alarm device.
9.2.9 Description of the device
There are a green and a red light-emitting diode (LED) at the
electronics.
• Green LED
– shows that the system is ready for operation.
– The LED is only on when the sensor is connected to the
electronics.
If the LED is off in this case, either the sensor or the cable is
defective or wrongly connected.
• Red LED
– shows that a diaphragm leakage has been detected.
– The green LED is still on.
9.2.10 Maintenance
Sensor
Optoelectronic sensor with 3 metres cable.
• Clean the sensor in case of malfunction.
• If the sensor still does not operate correctly, replace it.
Electronics
• No maintenance is possible by the user.
• If the electronics does not operate correctly, call Grundfos
service.
TM
03
63
85
45
06
1
K1
L
1
K2
N
1
K3
PE
1
K4
PE
1
K5
N
1
K6
1
K7
K8
K9
K10
1
1
1
S1
1
1
1
S2
230 VAC /
115 VAC
Contact 1 (non floating
230 VAC / 115 VAC)
Contact 2
(floating)
Sensor
Green
Yellow
White
Caution
Carry out a functional check before start-up!
Warning
Do not open the electronics or sensor!
Repairs must only be carried out by authorised
and qualified personnel!
Warning
Do not open the electronics or sensor!
Repairs must only be carried out by authorised
and qualified personnel!
Содержание DMX 221 Series
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