FAA Approved Installation Manual for the Report No 908
EDM-900 and EDM-930 Page 29 of 56 Rev I
Primary Engine Data Management System Date 1-18-2013
28. RPM Sensor installation
Use the J3 connector harness 790420 and connect the 3 leads using the supplied 3-pin connector and pins. There are
three types of magnetos commonly in use. You must have the correct RPM sensor for the magneto installed in the
aircraft. The following part numbers apply: Slick -4000, -6000 use JPI P/N 420815. For the Bendix -1200 use P/N
420815. Dual magnetos use JPI PN 420810. Mount the sensor as shown in the appropriate diagram below.
Slick
Magnetos
M ou nt senso r sid e of bracket tow ards
rev Mar 2004
Bendix
Magnetos
Bendix 1200 series
pressurized
JPI 420807
Connector to harne ss
engine
Alternate b racket loca tion s
T
O
P
position lim it
position lim it
M ou nt sensor sid e of bracket towards
m ag neto body, p os itio ne d ove r the m agn et
arm atur
e
Co nnector to harn ess
Slick 6000, 4000 series
non-pressurized
JP I 420815-1
engine
Co nnector to harn ess
Slick 6000, 4000 series
pressurized
JP I 420809
engine
TOP
Sen sor rin g munte d under vent plug.
Stem at rig ht angle s to ma gneto cen ter line
ma gn eto
body
Alternate b racket loca tion
Ven t plu g
Spa cer ring
Sen sor rin g bracket
M agn eto body
engi
ne
Slick 600
series
Sen sor m ust b e
over
mo ving m agnet
arm ature
Rem ove this
screw
to m ount
sen sor
brack
et
Bendix -20, -21, -200, 1200 series
non-pressurized
JPI 420815-2
Connector to harne ss
engine
Bendix Dual
Magneto
engine
M ou nt senso r sid e of bracket tow ards
m agn eto
body
T
O
P
RPM SIG G RN
RPM GND BLK
RPM PW R R ED
1