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Features
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27 mm and 28 mm diameter
10 turns
No backlash - mounted directly to
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High force, positive brake
RoHS compliant*
potentiometer shaft
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For use with precision
potentiometers or other rotating
devices up to 10 turns
CT-23/CT-26 Turns-Counting Dial
Mechanical and Physical Characteristics
Number of Turns ..................................................................................................................................................................................0 to 10
Readability - Over 10 Turns..........................................................................................................................................Within 1/500 of a turn
Torque with Brake Engaged .....................................................................................................................9.88 N-cm (14.0 oz.-in.) maximum
Markings .............................................................................................................................................................White on black background
Locking Brake................................................................................................................................................................Yes, Positive, friction
Weight.................................................................................................................................................................................34 grams (1.2 oz.)
Set Screw ...........................................................................................................................................................ISO M3x 0.35, one included
Set Screw Tightening Torque ...................................................................................................................16.94 N-cm (1.5 lbs.-in.) minimum
Hex Key Size ................................................................................................................................................................................1.5 mm hex
Shaft and Bushing Requirements
Shaft Diameter Requirements ........................................................................................................................................Refer to chart below
Shaft Extension Beyond Face of Locator Plate................................................................................................11.05 mm (0.43 in.) minimum
16.25 mm (0.63 in.) maximum
Bushing Extension Beyond Face of Locator Plate ............................................................................................4.00 mm (0.15 in.) maximum
Bourns ? Model CT-23, front of panel mounting, digital turns-
counting dial saves valuable internal space. Highly accurate, it will
enhance the man/machine interface of any control panel. Easy to
read white on black numerals provide excellent legibility and
accurate readings within 1/500 of a turn.
CT-23 MOUNTING INSTRUCTIONS
1. Drill or punch panel. See suggested hole pattern below.
2. Insert potentiometer in panel.
3. Mount potentiometer in panel with nut and lockwasher supplied
with the potentiometer.
4. Turn the potentiometer shaft counterclockwise to obtain minimum
resistance or voltage ratio (not necessarily at the end of travel).
5. Loosen set screw in knob with allen wrench. Set the dial readout
to “000.”
6. Slip the dial carefully over the potentiometer shaft. Tighten the
set screw without causing movement of the dial readout or
potentiometer shaft.
DIMENSIONS:
Dimensional Drawings
MM
(IN.)
Bourns ? Model CT-26 recessed mounting digital turns-counting dial,
counterpart to the Bourns Model CT-23, provides a lower panel
profile. The design simplifies installation requiring only one panel
hole. The CT-26 maintains the same high level of symmetry,
legibility and accuracy of its counterpart.
CT-26 MOUNTING INSTRUCTIONS
1. Drill or punch panel. See suggested hole pattern below.
2. Insert turns-counting dial in panel cutout and secure with
mounting nut.
3. Secure locator plate to potentiometer bushing using two hex
nuts.
4. Turn the potentiometer shaft counterclockwise to obtain minimum
resistance or voltage ratio (not necessarily at the end of travel).
5. Loosen set screw in turns-counting dial with allen wrench. Set
the dial readout to “000.”
6. Slip the potentiometer shaft into the turns-counting dial, insuring
that the notch in the locator plate is over the pin at the rear of the
dial. Tighten the set screw without causing movement of the dial
readout or potentiometer shaft.
For mounting, the maximum recommended panel thickness is
1/8 " (3.1 mm).
How to Order
Part
Accepts Shaft
Number
CT-23-6A
CT-23-6M
CT-26-6A
CT-26-6M
Diameter
6.35 mm (.250)
6 mm (.236)
6.35 mm (.250)
6 mm (.236)
Finish
Black
Knurl
with Satin
Chrome
Face
REV. 04/07
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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