USER INFORMATION

5

TACHOMETERS AND DATA ACQUISITION EQUIPMENT

Tachometers and data acquisition systems require a certain type of trigger signal. Most of these

systems require either a 12-volt square wave signal or a current style inductive pickup. MSD has

components that can provide both signal types.

Tach Converter, PN 8132

This converts the Pro Mag’s

signal to a 12-volt square wave

with a 20% duty cycle. It will

work on all Pro Mag systems

and requires a 12 volt battery

source.

Tach Terminal

The MSD Timing Retard,

PN 8168 has a Tach

output terminal that pro-

vides a 12 volt square

wave signal.

GRID Tach Lead

GRAY - TACH

Figure 7 Wiring a Tachometer with the Tach Converter.

TACH TRIGGER WIRE

RED TO

SWITCHED 12V

ORANGE

FROM PRO MAG

BROWN/BLACK

INDICATES CONNECTION

BROWN/ORANGE

PRO MAG/VERTEX

BROWN/YELLOW

OTHER MAGNETOS

OR

BLACK

FROM

PRO MAG

MAG

KILL

SWITCH

BLACK

TO BATTERY (-)

TERMINAL

VIOLET

PRO MAG

TACH

CONVERTER

PN 8132

AUTOTRONIC CONTROLS CORPORATION

1490 HENRY BRENNAN., EL PASO, TX 79936

TM

IGNITION

TACH

Figure 6 Wiring a Tachometer with the Tach Converter.