11
©
Dinel, s.r.o. ULM–54
Wiring operations shall only be carried out without voltage!
The supply source should be preferably designed as a stabilized source of safe
voltage with galvanic separation. If a switching power supply is used, its design must
effectively suppress common mode interference. If the switching power supply is
equipped with a PE protective terminal, it must be earthed!
If the sensor is located outdoors at a distance of more than 20 m from an outdoor
switchboard or from an enclosed building, the electrical supply to the sensor must
be supplemented with suitable over voltage protection.
In case of strong ambient electromagnetic interference, concurrence of the supply
cable with the power line, or its length greater than 30 m, we recommend grounding
the level meter (see above) and using a shielded cable. Ground the cable shield on
the side of the power supply.
7. Electrical connection
Connection diagram
Performance „B“ with
short cable gland
Performance „H“ with cable gland
for protective hose
ULM-54 level meters with cable gland type B or H are equiped by 5m PVC cable (standard) for
connection to evaluation (display) units by PVC cable 5 m long. Standard glands M16 x 1.5 (B) or
protection glands (H). The connection diagram is shown in the figure.
The positive supply pole +U is con-
nected to the brown wire, the nega
-
tive pole is connected to the blue
wire.
