Limaco ULM-3D Series, Руководство по эксплуатации и установке

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9 – Relay display unit, example of light alarm structure;
10 – microSD slot;
11 – Switch, matching load of RS-485 line R
A-B
=120 Ohm;
12 – Modbus address switch;
13 – "Backup program" switch, return to factory settings;
14 – Switch for selecting the interface in use.
5.5 Power supply
Use a stabilized DC power supply with an output voltage of
=
ИП
U
(24..36) V. Sev-
eral level transmitters can be connected to the same power source.
The power supply shall ensure a load current of at least 1A per level transmitter
,
where n is the number of level transmitters connected to the source.
The power of source shall be at least
ИП ИП ИП
I U P
⋅ =
.
Fig. 5.5 Diagram of level transmitter connection to power source
Источник питания
Power supply
If the power supply line is extended, take into account the voltage drop on the
supply wires.
If the external diameter of cable will be more than permissible one for the transmit-
ter cable gland, use the terminal box connecting the supply transmitter cable of
permissible sections and cables of larger section (trunk cable). The above connec-
tion diagram is shown in Fig. 5.6.
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RE_ULM3DX_18_02_20