Mastervolt Alpha 12/90 User Manual

INSTALLATION
14 June 2007 / Alpha alternator - Alpha Pro regulator / EN
4.5.4 Connection of a tachometer (optional)
If a tachometer is used, it should be connected
between the W terminal of the alternator (see
reference j) and the B– terminal of the alternator
(or the NEG pole of the battery). See figure 9.
NOTE!
With some alternators the W terminal is
marked by an “R” instead of a “W”
NOTE!
The operation of the tachometer can not
be guaranteed when the Alpha Pro
regulator switches from absorption mode
to float mode. Switching on some loads
during operation will solve this problem.
Figure 9: Connection of a tachometer (position of the
terminals may differ; see APPENDIX figures A-6 till
A-9)
4.5.5 Connection of an alternator indication
lamp (optional)
To check the correct operation of the alternator often
an indication lamp is used. This lamp will go off
when the alternator is charging
• For Alpha alternator model 24/95C only: see
figure 10
Figure 10: Connection of an alternator indication
lamp (Alpha alternator model 24/95C only)
Ignition switch
Normally
closed relay
(24V)
Alternator
indication lamp
D+
Tachometer
“W”
“B–”

Mastervolt Alpha 12/90 Specifications

General

Brand	Mastervolt
Model	Alpha 12/90
Category	Portable Generator
Language	English