H-38-11 Bourns Inc., H-38-11 Datasheet - Page 32

• Manufacturer Part Number: H-38-11
• Description: HDWR NUT MOUNTING FOR ECW ENCODR
• Manufacturer: Bourns Inc.
• Type: Mounting Nutr
• Series: Hr

Specifications of H-38-11

• Mounting Hole Size: 9 mm
• Features: Hardware indicated by shaded area is normally supplied with unit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ECW1DB24BC0024 - ENCODER DIGITAL CONT 24 CPRECW1JB24BC0024 - ENCODER DIGITAL CONT 24 CPR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Application Notes
Multiple-Input Position Sensor
In this application, a multiple-input circuit takes
outputs from two or more position-indicating
potentiometers, resulting in a control voltage output
proportional to the sum of the shaft positions. The
selected series resistor value must be large compared
to potentiometer value for maximum accuracy.
Different resistors give weighted sums while opposite
polarities give differences. See Figure 7.
Figure 7: Multiple-Input Position Sensor Circuit
Shaft Angle Sensor
As a shaft angle sensor, the shaft position or
direction indicator for rotatable antenna, control
surface, valve, tool, etc. The position signal may be
indicated, displayed or used to control some related
function. See Figure 8.
Figure 8: Shaft Angle Sensor Circuit
Regulated Power Supply Voltage Control
A regulated power supply control uses a highly linear
10-turn precision potentiometer. A digital turns-
counting dial can be used to indicate the output
voltage. See Figure 9.
Figure 9: Regulated PS Voltage Control Circuit
RC Frequency Control (Calibrated)
A frequency control in a bridge oscillator requires
that the two potentiometers track each other closely.
Good linearity is necessary if a calibrated dial is to be
used. Wirewound potentiometers work well for
frequencies up to a few tens of kHz. At higher
frequencies, winding inductance causes problems
dictating use of film elements. The resolution of
wirewound potentiometers should be considered at
the low R (high frequency) end of rotation. Both
potentiometers are controlled with a single shaft. See
Figure 10.
Figure 10: RC Frequency Control Circuit
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