Powerdynamo brings new ignition & light 
to your classic bike

 

electronic revolution counter (tachometer) for our systems
The fact that there are no longer points (contact breaker) in the system is surely highly welcomed by all - except your revolution counter. The counter has lost its point of reference for the pulse.

Unfortunately it is not so easy to connect rev meters so far fed from a points signal to our systems. There are problems both in the nature of the signal and internal ratio of the meters. To make things worse, there are so many different meters, most of them originally made for a specific purpose, that it is impossible to tell from afar what your have and need.
We had produced a solution on the basis of material that was known to us. This consisted of the following:
  • rev meter made by  Nova MMB Schwarzenberg
    with internal ratio 2:1 (sorry only 2:1 modules available now) and positive pulse feed (Note, instruments expecting negative feed will not work)
  • adapter module to connect all Powerdynamo systems (except ignition only systems, notably our sports system with internal rotor)
HOWEVER as materials from MMB have changed over time and we have not tested their present product line we can not vouch that present MMB´s will wotk with our solution. From some customer feedback we have to assume that there are problems. 
Adapter module
The module is housed in an casing from a vehicle relay and brings a piece of cable along to connect directly to our systems. There are in fact 2 different cables, one for the internal, the other for the external systems (because of different plugs). So you will have to inform what system you have.
Adapter 70 00 111 in
(intern sensor )		 Adapter 70 00 111 xt
(extern sensor )
assembly instruction assembly instruction
1 = adapter module
2 = plug to ignition coil		 3 = plug to generator or so you have advance 
4 = wire to rev meter
basic wire diagram see here
The module (dimensions of box: 25x25x20 without holder lid) is made to connect to rev meters with internal ratio 2:1 and expecting positive pulse. It works with all such meters from MMB.

Theoretically it should work as well with other makes sporting the same characteristics. BUT we have not been able to test that and can therefore not define the module as generally fitting for all meters with 1:1 and positive pulse.

We did check however operation with a Kroeber resp. Pitsch LZ13 as well as the (electronic) MZ ETZ tachometer nd found that those instruments DO NOT respond to our module.
for rev counter modules see

MMB website here

and please do buy directly from MMB

Special offer: 80mm instrument complete with adapter module