VRM

VRM

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FANS SPEED CONTROLLER FOR AC MONOPHASE FANS

VRM is used to adjust proportionally and continuously the speed of voltage adjustable fans, through a particular software
which guarantees the best performance in regulation.

While functioning as "Chiller" it can supply power to and directly manage 1 or 2 pressure sensors at the same time, with
an output voltage regulation directly proportional to the variation to the more signal detected. For "Heating" function
is also available the maximum output function for the bypass of signal command to set the fans to the max speed.

While functioning as "Dry cooler" it can supply power to and directly manage 1 temperature sensor with an output voltage
regulation directly proportional to the variation to the signal detected. VRM has 2 temperature set point and a regulation
band, all settable. The values of pressure / temperature are established simply by modifying the position of 3 scale knobs.

While functioning as "Slave" it works as a simple voltage regulator whose command signal comes from a potentiometer or
a remote control. On slave mode it's possible also to limit the voltage/speed from a low value to a High value.
On the card is installed an EMC filter suitable for residential, commercial and industrial environments. The control is inside
a robust aluminium box with IP55 grade protection for outdoor.

The standard version presents the following features:
- Mono-phase power supply 230Vac 50-60Hz,
- Working temperature: -25T50°C with IP55 grade; storage
temperature -40T80°C,
- Analog inputs command and digital inputs of: start/stop,
max speed / Set1-Set2 for modes of operation described
above,
- Auxiliary output +V and +5V to supply the sensors or the potentiometer,
- Protections: Class II for input commands (4kV), class I for the
accessible parts;
- Standard norms applied: EN60730-1, EN61800-6-3