4
The Terminal Strip
+12VDC Terminal: Connect the +12VDC terminal to a switched +12 Volt source with enough amperage capable of
driving all outputs at the same time. (Recommended 10 Ga. Wire)
Transbrake Terminal: Connect the Transbrake terminal to the Transbrake solenoid. If using a MSD 2-Step connect
the red wire from the 2-Step here. (Recommended 10 Ga. Wire)
S.F.O. Terminal: Connect the S.F.O. (Selectable Function Output) to a device that is to function in one of the
following four ways.
1) A device to be used as the Starting Line Enhancer, usually a linkage style throttle stop.
2) A device to be controlled by the second four-stage timer.
3) Connect to the Line Locks, if the Line Locks are to be engaged when the Transbrake is
engaged or the Line Lock push-button is pressed.
4) Connect to the Transbrake solenoid, this is to be used only as a temporary back-up output.
Make
sure that the S.F.O. mode setting is correct for the device being used.
Incorrect
settings will cause undesirable results.
(Recommended 10 Ga. wire)
Throttle Stop Terminal: Connect the Throttle Stop terminal to a throttle stop or some other device to be controlled by
a four stage timer down track. This is the main four-stage timer (Throttle 1). (Recommended 10 Ga. wire)
Shift Terminal: Connect the Shift terminal to the shifter solenoid. It is recommended that the wire going from the Mega
350/450 shift terminal to the shift solenoid be separated from all other wires to eliminate cross talk between the wires. If all
wires are bundled together undesirable results may occur. (Recommended 10 Ga. Wire)
Ground Terminal: Connect the Ground terminal to the Neg. terminal on the battery or to a good steel ground, not
aluminum. (Recommended 14 Ga. Wire)
Button-1 Terminal: Connect the P.B. 1 terminal to either wire from the primary push-button. The other wire from the
primary button is then connected to ground. See page 7 for more information on setting button modes and double hitting the
tree. (Recommended 16 Ga. Wire or 18 Ga. Corded buttons)
Button-2 Terminal: This terminal is only used if the driver intends to double hit the tree with two separate buttons
(push-button mode 2). Connect the P.B. 2 terminal to either wire from a “second hit” push-button. The other wire
from this button is then connected to ground. (Recommended 16 Ga. Wire or 18 Ga. Corded buttons)
Line Lock P.B. Terminal: Connect to an optional Line Lock push-button. The button functions are listed below.
1) If the Line Lock push-button is pressed and the S.F.O. mode is set to 3 (Line Lock Control), the Line Locks hooked to
the S.F.O. Terminal will be engaged. Functions 2 and 3 are for the Mega 450 only.
2) If the Line Lock push-button is pressed and the Record mode is set to HI, the Replay Tach Record function is armed
3) If the Line Lock push-button is pressed and the Record mode is set to LO, the Replay Tach will start recording
(Recommended 16 Ga. Wire or 18 Ga. Corded buttons)
Tap P.B. Terminal:
Connect to an optional Tap push-button terminal connect to an additional push-button. This button
can control three different operations.
1) If the Starting Line Enhancer feature is turned on and the Tap push-button is pressed the throttle will close allowing
the car to be staged at a preset RPM before the Transbrake is applied.
2) After a Transbrake push-button has been released, every time the Tap push-button is depressed a programmable
amount of time is either added to, or subtracted from, the first delay time started until the Transbrake is released.
3) A third of a second after the Transbrake releases and for every time the Tap push-button is depressed a programmable
amount of time is subtracted from the second or fourth stage times. See Understanding the P.T.S.O.
(Recommended 16 Ga. Wire or 18 Ga. Corded buttons)
Tach Terminal: Connect the Tach terminal to the tach output on the ignition. The Tach terminal must be connected
for proper operation of the Mega 350/450 when shifting by RPM or utilizing the Replay Tach feature of the Mega 450.
(Recommended 16 Ga. Wire)
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