High Country Tek HFS-J-Bus - Manual (Page 13)

Electronic Controller Solutions for the Global Fluid Power Industry
Hydraulic Fan System Controller with SAE J1939 Interface
HFS-J User Guide
Part No:- 021-00158 Rev C HFS-J Hydraulic Fan System Controller User Guide Page | 13
Signal Common Input ( Connector terminal 8 ):
This input should be used in conjunction with the thermistor input # 1and is internally connected to Power Common (
Terminal 7 ) on the card. To provide the best possible noise resistance Sig Com should be used as the only ground for
the temperature sensors.
Signal Common Input ( Connector terminal 9 ):
This input should be used in conjunction with the thermistor input # 2 and is internally connected to Power Common (
Terminal 7 ) on the card. To provide the best possible noise resistance Sig Com should be used as the only ground for
the temperature sensors.
Alarm Output ( Connector terminal 10 ):
This output can SOURCE up to 3 amps at supply voltage and can be used to connect to an audio device or light
indicator to show the systems alarm condition. This output is reverse polarity, short and open circuit protected and
monitored for short circuits to ground connection by the controller GUI software.
NOTE:
If this output is used with an inductive load unless a correct ‘flyback’ device is used to protect the
controller from back EMF.
Because of the open and short monitoring feature, there is a minimal current present at all times, even
when the output is OFF.
Reverse Valve Output ( Connector terminal 11 ):
This output can SOURCE up to 3 amps at supply voltage and can be used to connect to the directional valve or stroker
polarity relay used to reverse the fan motor flow direction when the purge or De-ice feature is used. This is a normally
OFF output that goes to supply voltage when energized.
This output is reverse polarity, short and open circuit protected and fully monitored by the controller GUI software.
Proportional Valve Output ( Connector terminal 12 ):
This output can SINK up to 3 amps at supply voltage and can be used to directly control the proportional valve or
pump stroker used for fan speed control. This output is reverse polarity, short and open circuit protected and fully
monitored by the controller GUI software.