High Country Tek emc-1V - Manual (Page 15)

Part No:- 021-00351 Rev 1.0 emc-1P & emc-1V e-Fan System Controller User Guide Page 15
e-Fan Cooling System Controllers
with J1939 Interface
Fan Reverse Switch Input (Momentary contact)
This is a momentary signal input and only required that the input be pulled to +5V or Supply Power
Supply for approx. 500mS to initiate the reverse sequence settings, this input is debounced in the module
software to avoid false triggers.
This input may normally be referenced to chassis ground
Fire Detect Input: (emc-1P only)
Signal input must be pulled to +5V or Supply Power by the fire event. This will turn OFF the Fans.
This is not latched and will return to normal operation when off. (0V)
Connect to PWR common 0V (GND) if not used.
Ignition Input
Ignition input must be pulled to +5V or Supply Power to enable operation.
This is not latched, emc-1 will not be enabled when off.
Power Ground Input, (0V)
This terminal is the Main Power Ground or Power Common (0V) input on the controller. To provide the
best possible noise resistance and current capability, this input should be taken directly to battery
Negative or the power supply 0V (GND) output using a large current capacity cable. DO NOT use a
connection to chassis or false operation may occur.
Alarm Output
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 can be set active High, or active Low.
Output is reverse polarity and short circuit protected.
Reverse Indicator Output
This output can SOURCE up to 3 amps at supply voltage and can be used to connect to an indicator or
alarm to show reverse status. This is a normally OFF, output will go to supply voltage when energized.
Output is reverse polarity and short circuit protected.
NOTE:
The Alarm and Reverse Outputs, will source a small amount of current when OFF. The
current available at 32 volts would be ~500uA and ~200uA at 12 Volts. This small amount of
current should be considered when driving high impedance inputs or high efficiency LEDs.
Proportional Output; The function of this pin is dependent on the model in use.
emc-1P
This is a proportional Pulse Width Modulation (PWM) output that vary between 0 to 100% and can source
up to 100mA and is intended to drive the command input of a ‘Smart’ electric fan that requires a low level
PWM input for control. The PWM frequency is adjustable from 33 to 500Hz through the GUI. This output
is reverse polarity, short and open circuit protected.
emc-1V
This is a proportional 0 to 5 Volt DC output that is capable of driving up to 10mA (or loads up to 100Ω )
and is intended to drive the command input typically seen on VFD converters. This output is reverse
polarity, short and open circuit protected.