26 15.720023-V3.0
DMX model 227
7.2.2 Using the Contacts
❏ Terminals 6 and 7 (potential-loaded):
- e. g. for switching off the dosing pump in case of a diaphragm breakage
➜
Observe Technical Information of the dosing pump!
❏ Terminals 8, 9 and 10 (potential-free):
- e. g. for triggering an alarm device
7.2.3 Description of the Device
There are two light-emitting diodes (LED) at the electronics.
❏ Green LED:
- Shows the readiness for operation of the system.
- It only lights when the sensor is connected to the electronics. If it does
not light in this case, either the sensor or the cable is defective or
wrongly connected.
❏ Red LED:
- Lights in case of a diaphragm breakage being detected.
- The green LED continues lighting.
7.3 Electrical Connections of the Electronics
!
WARNING 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.
CAUTION 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!
To guarantee electromagnetic compatibility (EMC):
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.
● Connect the device to the mains according to the connection chart.
● Connect the electronics with the sensor according to the connection chart.
!
WARNING The potential-loaded contact 1, terminals 6 and 7, is
loaded with mains voltage.
Switch off mains before connecting contact 1!
CAUTION 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.
● Connect contacts 1 and 2 according to individual needs.
➜
Refer to Section "Electrical connections"
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