SMT8_4 TECHNICAL MANUAL

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Support for your SMT8 V4 Unit.

PROTECTION

The SMT8_4 can be programmed to ‘protect’ the engine should an input go out of range.

SMT8V4 Piggy-Back Unit - ShiftF10 - Protection

CUT Ign.AMP Lim
Should the manifold pressure exceed the limit then the crank signal output is cut.


CUT Eng.Temp Lim
Should the engine temperature exceed the limit then the crank signal output is cut.


CUT Air.Temp Lim
Should the air temperature exceed the limit then the crank signal output is cut.


CUT Rpm Limit
Should the engine Rpm exceed the limit then the crank signal output is cut.


RET Ign.AMP Lim
Should the manifold pressure exceed the limit then the ignition timing is retarded gradually until the ignition retard limit is reached. (Shift F1)


RET Eng.Temp Lim
Should the engine temperature exceed the limit then the ignition timing is retarded gradually until the ignition retard limit is reached. (Shift F1)


RET Air.Temp Lim
Should the air temperature exceed the limit then the ignition timing is retarded gradually until the ignition retard limit is reached. (Shift F1)


RET Rpm Limit
Should the engine rpm exceed the limit then the ignition timing is retarded gradually until the ignition retard limit is reached. (Shift F1)


RET Time Seconds
The time in seconds before the SMT8_4 implements the retard protection.


The MOD protection works on the Analog 1 and 2. The protection circuit will make the output progressively 0 volts or 5 volts if the programmable limit/s are breached. Both analog outputs can be protected. The output can be inverted (Shift F2) which will make the output progressively 0 volts when a limit is reached. The protection is enabled in the Shift F2 map.


MOD AMP Limit
The manifold pressure limit for the protection to kick in.


MOD Eng.temp Lim
The engine temperature limit for the protection to kick in.


MOD Air.temp Lim
The air temperature limit for the protection to kick in


MOD Rpm Limit
The RPM limit for the protection to kick in


MOD Time Seconds
The time in seconds before the SMT8_4 implements the protection.