RPM ModuleA-451(GB) Operating instructions

01+

2The solution for picking up the RPM on nearly all types ofpetrol engines
It is an electronic amp with microprocessor which adapts the RPM signals
coming from nearly all types o f engines, on ALFANO data acquisition
systems.
The new ALFANO: PRO+(V1.05.06), AStrO(V2.05.06), AStrO formula
4T(V4.05.06) and higher versions will be able to display correctly the RPM
for 3, 5, 6, 8 and 10-cylinder engines.

The A451 module has 4 wires
The “RED” and “BLACK” wires, which supply power to the module :Connect to the positive and negative (12 Volts).
Length 350cm
The “BLACK” wire with “banana” jack, the RPM transmitter:
Connects to the ALFANO: Port “F”.
Length 70cm
The “GREEN” wire, which picks up the RPM :Connects to the engine ignition.
Length 350cm

The installation procedure has 4 stages
I.
II.
III.
IV.

Installation of the A451 module onto the vehicle
How to find the RPM signal on the majority of ignitions
Configuring the A451module
Configuring the ALFANO

Copyright  2005 Alfano, S.A. Tous droits réservés.

3I. Installation of the A451 module onto the vehicle
1)
2)
3)
4)

Connect the “Red” and “Black” wires correctly to the vehicle’s
12 Volt power circuit, preferably in the fuse box.
Plug the RPM transmitter (“Black” wir e with the“banana” jack) into the “F” port of your ALFANO.
Take off the cover of the A451 module.
Finally, look for the wire carrying the RPM signal on thevehicle ignition to connect the RPM sensor (“Green” wire).

II. How to find the RPM signal on the m ajority of engineignitionsA) Traditional high voltage coil:
Connect the “Green” wire of the A451 module to the negative terminal ofthe coil.

« Green » wireB) High voltage coil (twin static type) with 2 wires and more :A single wire is capable of providing y ou with the RPM signal on the majorityof ignitions. You have to locate it to connect electrically the RPM sensor tothe “Green” wire of the A451 module.
Tip: to avoid damaging the insulation of thewires connected to the coil when looking for
the RPM signal, use a (sewing) pin and stick it
into one of the wires: make sure the pin
pierces the wire right to the centre to obtainelectrical contact. Strip the “Green” wire of
the A451 module and twist it around the pin.
BE CAREFUL of short -circuits.
Turn the engine over at idling speed andwatch the “A” LED on the module (see page2): the LED will light up when in contact withthe wire carrying the RPM signal. If this does
not happen, repeat the operation on the otherwires until the “A” LED lights up.

Copyright  2005 Alfano, S.A. Tous droits réservés.

4C) High voltage coil located on the spark plug, with 2 wires or more :The procedure for looking for the wire carrying the RPM signal is the sameas that described for the (twin static) high voltage coil above.
D) Electronic computation unit :On electronic units, such as GM, HEI or MSD, you will find a special terminal“TACH”: connect the “Green” wire of the A451 module to it.

« Green » wire

Electroniccomputation unit

To guarantee long -lasting operation, carry out the wiringcorrectly in accordance with automobile standards,
isolating electrical conductors from each other to avoid
short-circuits

Copyright  2005 Alfano, S.A. Tous droits réservés.

5III. Configuring the A451 module
Once the module is installed, it must be configured.
1)
2)
3)

Turn the engine over at idling speed. (DO NOT ACCELERATE)Then simply press button “B” for one second (see page 2).
Close the unit.

IV. Configuring the ALFANO
This operation is to ensure the RPM is displayed correctly on your ALFANO.
1)
2)

Turn the engine over at idling speed. (DO NOT ACCELERATE)
In “menu 14” of your ALFANO, use the right -hand button to selectthe correct unit to display the right RPM.

On versions PRO+(V1.05.00), AStrO(V2.05.00),
AStrO formula 4T(V4.05.02) and lower, the following units areavailable: (/8) (/4) (/2) (X1) (X2) (X4) (X8).
From versions PRO+(V1.05.06), AStrO(V2.05.06),
AStrO formula 4T(V4.05.06) onwards, other units have been introduced
to cover additionally engines with 3, 5, 6 and 10 cylinders.
(/10) (/8) (/6) (/5) (/4) (/3) (/2.5) (/2) (/1.5) (/1.25)(X1) (X1.33) (X1.6) (X2) (X4) (X8)
These units will divide or multiply the impulses from the RPM module andthe result will be displayed above a nd on the right of the screen.
If you know your idling RPM, all you have to do is find it on your ALFANO.

Copyright  2005 Alfano, S.A. Tous droits réservés.

6
Guarantee conditions
All our devices have been subjected to in -depth factory tests and are covered by a 24 month guarantee against m anufacturing defects. The guarantee comes into force fromthe date of purchase. The date of purchase is the date indicated on the invoice/till receipt
given by the seller at the moment of sale. The manufacturer undertakes to repair andreplace free of char ge any parts which have a manufacturing defect during the guarantee
period. Any defects which cannot be clearly attributed to the material or the
manufacturer will be examined at one of our approved after sales service centres andinvoiced depending on the results. The guarantee does not apply in cases of opening thedevice, of accidental damage, negligence or inappropriate usage, in cases of installation
which is unsuitable, erroneous or does not comply with the instructions appearing in thenotice and in cases of phenomena not associated with the rules for operation and use ofthe device. The guarantee is invalidated in cases of repair or handling carried out by
unauthorised third parties. Intervention under guarantee does not give the right toreplacement of the device or to extension of the guarantee. Intervention underguarantee is carried out at one of our approved after sales service centres or at our headoffice. In the latter case, the item must reach our establishment postage paid, in otherwords the transport costs are borne by the user. The manufacturer accepts noresponsibility in case of damage to persons or goods caused by poor installation orincorrect usage of the device.
Modifications to products
Alfano SA applies a method of ongoing devel opment. Consequently, Alfano SA reserves
the right to make changes and improvements to any product described in this document,
without prior warning.
Damages and responsibilities
The products are used under the customer’s sole direction and responsibili ty, andconsequently the customer shall bear the damages that the products might suffer orcause. No compensation will be paid for removal of enjoyment, and ALFANO cannot beheld responsible for the direct or indirect consequences of their use or rendering useless.
ALFANO’s obligations are duty of care and not a performance obligation.
Disposal
The device must be disposed of with respect for the environment.
The stopwatch and its accessories contain a lot of plastic parts.
When the stopwatch or one of i ts accessories no longer functions, they must be dealt
with according to the laws of the country. Spent batteries must be disposed of inaccordance with the regulations in force in your country.

Copyright  2005 Alfano, S.A. Tous droits réservés.

7

ALFANO S.A.
Rue de l’ Industrie, 3b – 1400 NIVELLES
www.alfano.com

Copyright  2005 Alfano, S.A. Tous droits réservés.