Connection To The Power Supply; Electrical Connections To The Dosing Systems (Utilities) - Seko K500 TB Manuel D'installation

3.1.3

CONNECTION TO THE POWER SUPPLY

If possible, keep any high power cables away from the control unit and its connection cable, as
these could cause inductive disturbances, especially for the analogical portion of the system.
Use an alternating 100Vac to 240Vac-50/60Hz power supply, based on that which is indicated on
the device's data label. The power supply must be as stabilised as possible.
Absolutely avoid connecting the device to rebuilt power supplies, using transformers for example,
where the same power supply is also used to power other systems (perhaps of an inductive
typology). This could lead to the generation of high voltage spikes which, once emitted, are difficult
to block and/or eliminate.
The electrical line must be equipped with an appropriate circuit breaker, in compliance with
the proper installation standards
It is nevertheless always a good idea to check the quality of the grounding connector. In industrial
facilities, it is not uncommon to find grounding connectors that cause electrical disturbances instead
of preventing them; wherever doubts should arise regarding the quality of the facility's grounding
connectors, it is best to connect the control unit's electrical system to a dedicated grounding rod.
3.1.3.1

Electrical connections to the dosing systems (Utilities)

Before connecting the analyser's control unit to the external utilities, make sure that the
electrical panel is off and that the wires from the mains power supplies are not live.
The term "utilities" is intended to indicate the relay outputs used in the control unit
(SET1) for controlling dosing or control pumps
−
(SET2) for controlling dosing or control pumps
−
(ALARM) alarm command transmitted by the instrument to the siren and/or flashing light
−
(WASH) wash electrode command
−
With a resistive load, each relay contact can sustain a maximum current of 1 amp, at max.
230V, and therefore a total power of 230 VA.
In the case of higher power values, it is recommended to perform the utility connections based on
the scheme provided in fig. 6-b)
If, on the other hand, the load is of a low power or resistive typology, the connection scheme in fig.
6-a) can be used
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ATTENTION
CAUTION
Rev. 3.1
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