Electrical Connections - Saci pumps VSD Magnus Manual De Instalación Y Mantenimiento

4 ELECTRICAL CONNECTIONS

Motor 3x400 V
Signal
Outputs relay 1 and 2
Fan
Digital intakes 1 and 2
Pressure transducer
Communication between
speed variators
Screen circuit
Description
Outputs that acts depending on how they have been programmed.
These outputs are potential free and have a maximum load of 5 ampe-
res at 230 Vac.
When wall-mounted, as there is no cooling from the motor's own
fan, the ventilation system of the wall mounting shall be used for this
cooling.
This output is 24 Vdc and it is activated whenever the variator is giving
a voltage output; its maximum load is 9 W.
N.B. It is very important to check the polarity of the variator cables
when they are connected, as if they are connected against the polarity,
the speed variator can burn out.
Any potential free contact that will perform the programmed functions
can be connected to these inputs.
N.B. Do not apply voltage to these inputs.
If it is connected, it will be used by the speed variator to determine the
pressure of the installation as well as the pressure during the "BACK
WASH" cycle.
This enables communication between various speed variators (up to 8)
through a 2-wire point-to-point cable.
Power supply
400Vac (3~ 50/60 Hz)
Output relay 2
Output relay 1
Fan
Digital input 2
Digital input 1
Pressure transducer
Communication speed
variator
VSD Magnus - [e]Magnus
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