High Country Tek HFS - Manual (Page 8)

Hydraulic Fan System Controller: HFS
The Opto 3000 interface unit is the equipment by which the fan controller is set-up and monitored, and is intended for
temporary use during static system set-up, commissioning and HFS module programming only.
It is not designed for continuous connection and operation, and should not be used or applied in areas where harsh
environmental or intense radio Frequency fields ( RF ) are present as unit resetting may occur, system diagnostic
information sent or received may be corrupted or the Opto 3000 unit damaged.
If any of the above problems are seen, dis-continue operation until the source of the RF has been identified and
stopped.
The Opto 3000 unit must be ordered separately to the main controller but this is a universal communications adapter
which will be used with other HCT controllers and products.
For most accurate smooth control with best resolution, protection and product reliability, the following combinations of
power supply and valve coil voltage should be adhered to:-
Proportional coils ( fan speed control ):-
8 – 14VDC:- Use 12V valve coil.
20 – 36VDC:- Use 24V valve coil.
These inputs are ON/OFF in nature and are additional to the proportional thermistor inputs. They allow the application
to have two „Emergency‟ maximum fan speed selector channels. These inputs can be connected to simple
temperature switches and used to give full fan speed if the actuation point of the temperature switch is reached.
Alternative operation could be manually triggered from in-cab or when a particular vehicle operation is activated, the
fan goes to full speed for the duration of the cycle.
This unit has been electrically designed to pass the latest CE tests but has not yet been certified for stand-alone
usage.
This unit can however, confidently be used as part of a larger system which will then be tested to the relevant CE
standards.
Switched Inputs ( Fan Speed Override ) :
Power Supply & Valve Coil Voltage
CE and EMC Notes :
Opto 3000 Notes
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