Section 75
00-02-0522
04-06-11 -
21 -
Digital Inputs and/or Relay Outputs
When wired to control the voltage regulator and the warmup speed, the Run/Idle switch input
(or the warmup timer) essentially inhibits AC speed detection in the idle and/or warmup mode.
NFPA-110 requires a secondary speed signal source to prevent crank re-engagement. If the
iGUARD is being used in an NFPA-110 / 99 application, and there is a low speed warmup/idle
required, the AC frequency cannot be used as a primary nor secondary speed signal source.
As this implies, there are no AC frequency or voltage based alarms or shutdowns available
during the low speed idle or warmup period. Since NFPA applications assume that there is no
warmup period (the requirement for a minimum - and therefore externally maintained jacket
coolant temperature) this should pose no problem for NFPA-110/NFPA-99 applications, unless
the application is in some way special, or the local inspector is making exceptions based on
intended use, or some other special circumstance.
The speed signals can come from the ECU, a magnetic pickup, or a separate speed switch
type device. When using a low speed idle (a run/idle switch input) for warmup in non-NFPA
applications, there are no special requirements for a secondary speed signal source.
When using a low speed idle (a run/idle switch input) for warmup in non-NFPA applications,
there are no special requirements for a secondary speed signal source.
Input Parameters - (Defaults Shown)
Digital Input 1
- Engine Overspeed.
Digital Input 2
- Crank Termination.
Digital Input 3
- User Input 1.
Digital Input 4
- User Input 2.
Digital Input 5
- User Input 3.
Digital Input 6
- User Input 4.
Digital Input 7
- User Input 5.
Phase-out
/ Discontinued
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