MSD 7530T Programmable Digital-7 Ignition Control Installation User Manual
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INSTALLATION INSTRUCTIONS
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Accessories
Dark Blue
This wire activates the Launch Rev Limit and is the main reset wire for several features of the
Ignition. When 12 volts are applied to this wire it will activate the Launch Rev Limit. It also
resets the shift light and gear indicator to first gear. It also will select the Launch Retard value
and Gear 1 curve.
Note: When this wire is activated it will override all other Rev Limits except the TCD Limit.
Light Blue
Burnout Rev Limit. When 12 volts are applied the Burnout Rev Limit is active.
Gray
Tach output. This wire will provide the same 12 volt square wave tach signal as the tach
terminal on the side of the unit.
Retard Stage Wires or Gear Select
These three wires can be used as Retard Stage Activation and/or as a gear select wire.
Pink
Step1 retard enabled with +12 volt input and above Step1 Rpm value and Gear 2 Select.
Violet
Step2 retard enabled with +12 volt input and above Step2 Rpm value and Gear 3 Select.
Tan
Step3 retard enabled with +12 volt input and above Step3 Rpm value and Gear 4 Select.
Note: When activated at the same time, these retard stages are added together. They are also
added with any Gear Retard Curve or Boost Retard values as well. Maximum retard is 30°.
Yellow
Shift Light output wire. It can handle up to 3 amps continuous to ground when enabled.
Brown/White RPM/Time switch output wire. It can switch up to 3 amps continuous to ground when enabled.
Yellow/Yellow Output for data acquisition or fuel controls. Note, only two wires are used.
Cam Synchronization
Fiber Optic This input requires the PN 7555 Inductive Sync Pickup. When this input is used, the 2-pin
connector is not.
Note: If this input is not used, the plug or a cover should be installed.
2-Pin Connector
Light Blue/ This 2-pin plug connects to Cam Sync Sensor, PN 2346, to indicate when cylinder number
one is firing.
Note: When used, the fiber optic connector is not used and must be covered.
Light Blue is cam (+) and Light Green (-).
Light Green