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ULM.0.01.000RE_10_08_20
5. ELECTRICAL CONNECTIONS
5.1 General guidelines
All connection operations must be performed with disconnected power.
Skilled personnel having permit for this type works must only be allowed to perform
electrical connection operations.
Level transmitter allows installation of two cable glands with sell-sealing NPT
thread. Casing can be factory-equipped with single cable gland with technological
cap; in this case, certified protective cap is installed in second lead-in.
Prohibited activities:
- leaving the device at the mounting position without the technological cap installed
when the cable is not connected;
- leaving the level transmitter at the mounting position with the connected cable, but
with loose cable gland;
- leaving the unused cable lead-ins not capped; certified protective cap must be in-
stalled therein.
5.2 Connection cable.
To connect the 4-20 mA analog output, use a standard pair of conductors in a sepa-
rate shield.
To connect the RS-485 digital interface, it is necessary to use a pair of conductors in
the shield, it is allowed to use a cable with a common shield. The use of round sec-
tion cable is required. In order to ensure stated IP grade with regard to dust and
moisture protection, the use of cable with diameter suitable for particular cable
gland is required.
For details, see para. 12.1 "Specifications. Electrical and mechanical data”.
It is prohibited to lead multiple cables in device through the same cable gland.
!
CAUTION
!
CAUTION
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WARNING
Содержание ULM-31-HF
Страница 28: ...28 ULM 0 01 000RE_10_08_20 Fig 4 12 Examples of Installation ...
Страница 74: ...74 ULM 0 01 000RE_10_08_20 12 5 Mounting of ULM 31А1 level transmitter at the stub tube ...
Страница 76: ...76 ULM 0 01 000RE_10_08_20 12 7 Mounting of ULM 31 HF ULM 31А1 HF level transmitters at the stub tube ...
Страница 77: ...77 ULM 0 01 000RE_10_08_20 12 8 Mounting of ULM 31А1 level transmitter at the stub tube with insulating spacer ...
Страница 83: ...83 ULM 0 01 000RE_10_08_20 12 14 Mounting flange ...