J.P. Instruments EDM 960 Twin Primary Installation Manual - Manual (Page 27)

FAA Approved Installation Manual for the EDM-960 system Report No 909
Primary Engine Data Management System Page 27 of 46 Rev D
Date 2-6-2014
32. RPM Sensor installation
There are four 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 – pressurized 4000, -6000
series use JPI P/N 420809. For the Bendix pressurized -1200 series use P/N 420807. Dual
magnetos use JPI PN 420808. For the Bendix -20 series and Slick 600 use JPI P/N 420806.
Mount the sensor as shown in the appropriate diagram below. Note: this is eligible for installation
on all 4 & 6 cylinder engines only.
Bendix Magnetos Slick Magnetos
Bendix Dual Magneto
JPI PN 420808
non-pressurized
engi
ne
Mount sensor side of bracket towards
magneto body
Bendix -20, -21, -200, 1200 series
non-pressurized
JPI 420815-2
Connector to harness
e
ngi
ne
Connector to harness
Slick 6000, 4000 series
pressurized
JPI 420809
e
ngi
ne
TO
P
Sensor ring munted under vent plug.
Stem at right angles to magneto center line
Mount sensor side of bracket towards
magneto body
Alternate bracket location
Vent plug
Spacer ring
Sensor ring bracket
Magneto body
Connector to harness
Slick 6000, 4000 series
non-pressurized
JPI 420815-1
e
ngine
Bendix 1200 series
pressurized
JPI 420807
Connector to harness
e
ngi
ne
Alternate bracket locations
TO
P
position limit
position limit
Mount sensor side of bracket towards
magneto body, positioned over the magnet
armature
rev Dec 2010
engin
e
Slick 600 series
JPI PN 420806
non-pressurized
Sensor must be over
moving magnet armature
Remove this screw
to mount sensor
bracket