H-38-11 Bourns Inc., H-38-11 Datasheet - Page 34

• 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
RC Frequency Control (Uncalibrated)
A panel control can be used as a frequency selector
in a square-wave generator. In this application, the
panel control is configured as a rheostat with wiper
current highest at high frequencies (low R). See
Figure 15.
Figure 15: RC Frequency Control Circuit
Universal Motor Speed Control
In this application, the panel control is normally a
wirewound in a rheostat configuration capable of
substantial wiper current and power dissipation. For
higher power motors, the potentiometer is
augmented by an SCR. Variable rate of speed change
can be accomplished by non-linear potentiometers.
Bi-directional speed controls can be accomplished by
the addition of a switch. See Figure 16.
Figure 16: Motor Speed Control Circuit
Trace Position
Used in vertical position control or trace position
control for oscilloscope amplifiers, the panel control
wiper current is nil in the center, but increases
toward each end. Unless limited by specification,
CRV may impair adjustability near the ends of
rotation. Both panel controls are normally controlled
with a single shaft. See Figure 17.
Figure 17: Trace Position Circuit
CRT Focus
In this application, the panel control is used as a
focus control for a cathode ray tube (CRT). With no
DC load present, there is also no wiper current.
Attention must be given to the high voltage rating of
the control as it may have several hundred volts
across the element and operate at several thousand
volts from ground. See Figure 18.
Figure 18: CRT Focus Circuit
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