MGL Avionics Blaze EMS-2 Operating Manual page 51

Blaze EMS-2 Operating Manual
10.3.2 RPM Input Dipswitch settings
Setting dipswitch 5 to the "ON" position (default) enables a high frequency filter in the RPM 1
signal path.
Setting dipswitch 6 to the "ON" position (default) enables a high frequency filter in the RPM 2
signal path.
Some installations (direct coupling to a Magneto device for example) will require this to be
switched "OFF". Dipswitch 1 is the closest switch to the edge of the PCB.
10.3.3 Engine RPM connection guide
Engine
Rotax 447 Connect the grey wire from the engine to the
RPM input
Rotax 503 Connect the grey wire from the engine to the
RPM input
Rotax 582 Connect the grey wire from the engine to the
RPM input
Rotax 618 Connect the grey wire from the engine to the
RPM input
Rotax 912 (S) Connect the rev counter wires (blue/yellow and
white/yellow). One of the two wires needs to be
connected to ground (engine block) and the
other to the RPM input.
Rotax 914 Connect the rev counter wires (blue/yellow and
white/yellow). One of the two wires needs to be
connected to ground (engine block) and the
other to the RPM input.
Engines with UMA Tach Sensor
magnetos T1A9-1 (Slick)
T1A9-2 (Bendix)
Connect the red or orange/white wire to 12V, the
black or blue/white and braid to ground. Connect
the white (signal) to the RPM input
HKS engine Connect the orange wire from the CDI unit to the
RPM input
MTH engine Connect the green wire from ignition sensor to
the RPM input
Werner engine Connect the yellow wire from ignition sensor to
the RPM input
UL Power Connect the ECU pin 9 to the RPM input
Note: Some Rotax engines may require that a 220 ohm ballast resistor is fitted between the rpm
input and the ground terminal. This resistor should be fitted if you cannot obtain stable RPM
throughout the range regardless of any setting of the rpm counter sensitivity adjustment.
Connection / Sensor Pulses per
revolution
6
6
6
6
1
1
1 pulse per revolution on
4-cylinder, 2 pole
magnetos
1.5 pulses per revolution
on 6-cylinder, 2 pole
magnetos
1
2
2
2
Page 51
220 Ohm Ballast
resistor
Certain installations,
see note below
Certain installations,
see note below
Certain installations,
see note below
Certain installations,
see note below
Insert ballast resistor
Insert ballast resistor
Certain installations
no
no
no
no