High Country Tek emc-3 - Manual (Page 13)

Page 13 of 39
emc-3 Controller Module
User Guide – Rev A
Diagnostic ( digital ) Inputs ( ALL via 30 way )
There are eight digital inputs available on the emc-3, used to monitor fan health;
they may be configured either as Active Low or Active High by setting the EE-
Memory variable “Fan DG Input Enable” as follows;
0 – DG Inputs are disabled.
1 – DG Inputs Enabled active low.
2 – DG Inputs Enabled active high.
The number of digital Inputs interrogated by the emc-3 is determined by the sum
of the Number of Fans assigned to all three banks. DG inputs are assigned for
use in order and by Bank assignment.
For example if a 2 is entered in Bank 1 Number of Fans and 6 is entered in Bank
2 Number of Fans then DG inputs 1 & 2 are assigned to Bank 1 and DG inputs 3
– 8 are assigned to Bank 2.
Reverse Input ( 30 way / Pin F2 )
The Reverse Input is an active high discreet input. It is used to manually initiate
or cancel a Reverse Cycle. A Manual Reverse Cycle Request is considered
valid if the Reverse Input pulse is between 500mS and 3.0S in duration. Pulses
of less than 500mS will be ignored. Pulses lasting longer than 3 seconds will be
considered a fault and cancel the Reverse Cycle. This prevents a shorted switch
from holding the fans in reverse.
If a reverse cycle is active and the Reverse Switch is toggled again, the current
reverse cycle will be cancelled. Auto Reverse cycles can also be canceled in this
manner.
Fire Input ( 30 way / Pin G2 )
The Fire Input is either an Active High or Active Low discreet input with a 500mS
debounce. The Fire Input is configured as follows;
0 – DG Inputs are disabled.
1 – DG Inputs Enabled active low.
2 – DG Inputs Enabled active high.
When a Fire valid signal is detected, all outputs are set to their
“Bank_n_Off_DYCY” setting until cleared.
Ignition Input ( 30 way / Pin H2 )
The Ignition input is an Active High discreet input with a 500mS debounce.
If the “Engine Minimum RPM” is zero, the emc-3 is enabled whenever the Ignition
Input is “On”.
If the “Minimum Engine RPM” variable is enabled, when the Ignition Input is “Off”
and there is a valid Engine RPM message detected, the emc-3 will report an
Ignition Input Error.