Function; Electrical Connections Of The Electronics - Grundfos DMX 24-8 Installation And Operating Instructions Manual

7.2.3 Function

7.2.4 Electrical Connections of the Electronics

26
Pumps prepared for a diaphragm breakage indication:
Special dosing head flange for inserting the optoelectronic sensor
Optoelectronic sensor, contains
- infrared sender
- infrared receiver
In case of a leaking diaphragm:
Dosing liquid penetrates the dosing head flange.
- The light refraction will be changed.
The sensor produces a signal.
- The electronics switches two contacts which can be used e. g. for
triggering an alarm device or switching off the pump.
WARNING
!
CAUTION
To guarantee electromagnetic compatibility (EMC):
Connect the device to the mains according to the connection chart.
Connect the electronics with the sensor according to the connection chart.
WARNING
!
CAUTION
Connect contacts 1 and 2 according to individual needs.
Refer to Section "Electrical connections"
Electrical connections only by qualified personnel!
Switch off mains before connecting!
Observe the local safety regulations!
Protect the cable connections and plugs from
corrosion and moisture.
Before connecting the power supply cable:
Check that the supply voltage specified on the rating
plate agrees with the local voltage. An incorrect power
supply could destroy the unit!
The input cables and current output cables must be
shielded.
• Connect shield at one end to PE.
Refer to the connection diagram!
Route input cables, current output cables and power
supply cables in separate ducts.
The potential-loaded contact 1, terminals 6 and 7, is
loaded with mains voltage.
Switch off mains before connecting contact 1!
The contacts have no protective circuits. Only pure
ohmic loads may be switched. For switching the pump
motor, a contactor has to be connected inbetween.
DMX model 226 en
15.720017-V6.0