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C3 User Guide

Mechanical engine monitoring and shutdown

Description

A combination of a C3 digital input and output can provide a simple method to

add after-market monitoring and shutdown control of an engine. Leveraging the

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of the engine. A normally closed relay contact can be used to shutdown the engine

remotely.

Electrical connection

• The power connection to the fuel solenoid or ignition of the engine

can be wired directly to a C3 input (tolerant of 24 V systems)

• The existing engine protection system will cut power to this connection if

an engine over-temperature or oil under-pressure condition is present

• A generic automotive relay can be wired in-line with the solenoid

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on for a short period of time to shut the engine down (Figure 39)

Installation notes

• The automotive relay is best connected as close as possible to the fuel

solenoid/ignition connection

• The relay would typically be housed within the existing engine protection

system enclosure

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