Speed sensors
Series 51 and Series 51-1 motors are available with an optional speed sensor for direct measurement of
motor output speed. The sensor may also be used to sense the direction of motor rotation.
Speed sensor with Packard connector
A
B
C
D
Packard weather-pack
4-pin tower connector
Supply voltage +
speed signal
ground common
direction
Deutz connector
Red
White
Green
Black
P100 187E
A special magnetic speed ring is pressed on to the outside diameter of the shaft. A Hall effect sensor is
installed in the motor housing. The sensor accepts supply voltage and outputs a digital pulse signal in
response to the speed of the ring.
Speed sensor location cartridge motors
Speed
sensor
Conical end
Bearing
Magnetic ring
(pressed onto the shaft)
Piston
P101 201E
The output changes its high/low state as the north and south poles of the permanently magnetized
speed ring pass by the face of the sensor. The digital signal is generated at frequencies suitable for
microprocessor-based controls.
Service Manual
Series 51 and 51-1 Motors
Operation
16 |
©
Danfoss | March 2016 11008567 | AX00000013en-US0202
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