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Features  
■ Compact design, long life and high  
reliability  
■ Vertical and horizontal mount versions  
■ Flatted and knurled shaft styles  
■ Variety of LED colors available  
■ Bushing and bushingless options  
PEL12S - 12 mm Encoder with Illuminated Shaft  
Electrical Characteristics  
Output.....................................................................................................................................................................................2-bit quadrature code  
Closed Circuit Resistance ........................................................................................................................................................... 3 ohms maximum  
Contact Rating.............................................................................................................................................................................. 0.5 mA @ 5 VDC  
Insulation Resistance ....................................................................................................................................................100 megohms @ 250 VDC  
Dielectric Withstanding Voltage  
Sea Level................................................................................................................................................................................300 VAC minimum  
Electrical Travel......................................................................................................................................................................................Continuous  
Contact Bounce (15 RPM).........................................................................................................................................................2.0 ms. maximum**  
RPM (Operating) ............................................................................................................................................................................ 100 maximum**  
Environmental Characteristics  
Operating Temperature Range.......................................................................................................................-10 °C to +70 °C (+14 °F to +158 °F)  
Storage Temperature Range .......................................................................................................................... -40 °C to +85 °C (-40 °F to +185 °F)  
Operating Humidity..................................................................................................................................................................... 25 % to 85 % R.H.  
Rotational Life..................................................................................................................................................................... 30,000 cycles minimum  
IP Rating...........................................................................................................................................................................................................IP 40  
Mechanical Characteristics  
Mechanical Angle ..........................................................................................................................................................................360 ° continuous  
Detent Torque..................................................................................................................................................30 to 200 g-cm (0.42 to 2.77 oz.-in.)  
Running Torque ......................................................................................................................................................50 g-cm (0.69 oz-in.) maximum  
Shaft Strength (Push)...................................................................................................................................................................... 5 kgf (11.0 lbs.)  
Shaft Strength (Pull)......................................................................................................................................................................10 kgf (22.0 lbs.)  
Weight ...............................................................................................................................................................................3 gm (0.1 oz.) maximum  
Terminals.................................................................................................................................................................. Printed circuit board terminals  
Soldering Condition  
Wave Soldering..................................................................... Sn95.5/Ag2.8/Cu0.7 solder with no-clean ?ux: 260 °C max. for 5 1 seconds  
Hand Soldering.................................................................................................................................................................. Not recommended  
Hardware...............................................................................................................................................................................No hardware supplied  
How To Order  
PEL12S - 4 0 20 F - N 1 024  
Model  
Terminal Con?guration  
2 = Vertical Mount/Side Exit PC Pin  
Detent Option  
4 = Horizontal Mount/Rear Exit PC Pin  
0 = No Detents  
2 = 24 Detents  
Standard Shaft Length  
Flatted:  
Knurled:  
15 = 15.0 mm  
17 = 17.5 mm  
20 = 20.0 mm  
25 = 25.0 mm  
30 = 30.0 mm  
24 = 24.0 mm  
Shaft Style  
F = Insulated Flatted Shaft  
S = Insulated Knurled Shaft (18 Teeth)  
G = Insulated Flatted Shaft w/Bushing***  
T = Insulated Knurled Shaft (18 Teeth) w/Bushing  
Switch Con?guration  
N = No Switch  
LED Color  
Single:  
1 = Red  
3 = Blue  
5 = White  
2 = Green  
4 = Orange  
Resolution  
024 = 24 Pulses per 360 ° Rotation  
*** Available in 17.5, 20 and 25 mm shaft lengths.  
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.  
**Devices are tested using standard noise reduction ?lters. For optimum performance, designers should use noise reduction ?lters in their circuits.  
Speci?cations are subject to change without notice.  
Customers should verify actual device performance in their speci?c applications.  
Applications  
Level control, tuning and timer settings in:  
■ Audio-visual equipment  
■ Consumer electric appliances  
■ Musical instrumentation  
■ Communications equipment  
PEL12S - 12 mm Encoder with Illuminated Shaft  
Product Dimensions  
PEL12S-4xxxS-Nxxxx (Horizontal Mount w/Single LED, No Switch, Knurled Shaft)  
MOUNTING  
24.0  
(.945)  
18.0  
(.709)  
5.0  
(.197)  
SURFACE  
14.0  
(.551)  
6.0  
(.236)  
12.4  
(.488)  
13.2 0.1  
(.520 .004)  
LED  
8.2  
(.323)  
5.0 0.1  
(.197 .004)  
3.5  
(.138)  
0.8  
(.031)  
7.0  
(.276)  
2 PLCS.  
2.1 +0.1/-0  
(.083 +.004/-0)  
2.0 0.1  
(.079 .004)  
7.0 0.1  
(.276 .004)  
13.2  
(.520)  
10.2  
(.402)  
18 TEETH  
7.5 0.1  
(.295 .004)  
2.0 +0.1/-0  
(.079 +.004/-0)  
2 PLCS.  
6.0  
(.236)  
DIA.  
6.8  
(.268)  
DIA.  
A
C
B
3.5  
(.138)  
A
C
B
5.0 0.1  
(.197 .004)  
5.0  
(.197)  
1.1 +0.2/-0  
(.043 +.008/-0)  
DIA. 5 PLCS.  
0.9 0.1  
(.035 .004)  
TERMINAL DETAIL  
PEL12S-4xxxF-Nxxxx (Horizontal Mount w/Single LED, No Switch, Flatted Shaft)  
MOUNTING  
SURFACE  
LM  
14.0  
(.551)  
L1  
LM  
6.0  
12.4  
(.488)  
(.236)  
5.0  
3
15  
L1  
(.197)  
(.118)  
(.591)  
8.2  
(.323)  
3.5  
0.8  
1.5  
(.591)  
5
17.5  
(.138)  
(.031)  
(.197)  
(.689)  
0.5  
(.020)  
2.0 0.1  
(.079 .004)  
7
20  
(.276)  
(.787)  
13.2  
(.520)  
10.2  
(.402)  
12  
25  
(.472)  
(.984)  
6.8  
4.5 0.05  
(.268)  
DIA.  
(.177 .002)  
12  
30  
A
C
B
3.5  
(.138)  
(.472)  
(1.181)  
6.0 0.1  
DIA.  
5.0  
(.197)  
(.236 .004)  
MM  
(INCHES)  
DIMENSIONS:  
Single LED Circuit  
TOLERANCES:  
0.3  
10.0 ~ 100  
(.394) ( .012) (.394 ~ 3.937) ( .020)  
10.0  
0.5  
=
=
UNDER  
( + )  
( - )  
Speci?cations are subject to change without notice.  
Customers should verify actual device performance in their speci?c applications.  
PEL12S - 12 mm Encoder with Illuminated Shaft  
Product Dimensions  
PEL12S-2xxxS-Nxxxx (Vertical Mount w/Single LED, No Switch, Knurled Shaft)  
24.0  
(.945)  
6.0  
(.236)  
18.0  
(.709)  
3.5 0.1  
(.138 .004)  
12.4  
(.488)  
5.0  
(.197)  
2.5 0.1  
2.4  
8.2  
(.323)  
(.098 .004)  
(.094)  
0.8  
(.031)  
7.0  
(.276)  
LED  
5.0 0.1  
(.197 .004)  
B
C
A
10.8 0.1  
(.425 .004)  
13.2  
(.520)  
10.2  
(.402)  
18 TEETH  
10.0  
(.394)  
6.0  
(.236)  
DIA.  
6.8  
(.268)  
1.1 +0.2/-0  
(.043 +.008/-0)  
DIA. 5 PLCS.  
DIA.  
2.0 +0.1/-0  
(.079 +.004/-0)  
2 PLCS.  
2.1 +0.1/-0  
(.083 +.004/-0)  
2 PLCS.  
A
C
B
3.5  
(.138)  
10.0  
(.394)  
2.0  
(.079)  
5.1  
(.201)  
PEL12S-2xxxF-Nxxxx (Vertical Mount w/Single LED, No Switch, Flatted Shaft)  
LM  
6.0  
(.236)  
12.4  
L1  
(.488)  
L1  
LM  
5.0  
(.197)  
2.4  
(.094)  
8.2  
(.323)  
3
15  
0.8  
(.031)  
1.5  
(.591)  
(.118)  
(.591)  
0.5  
(.020)  
5
17.5  
(.197)  
(.689)  
13.2  
(.520)  
10.2  
(.402)  
7
20  
(.276)  
(.787)  
10.0  
(.394)  
6.8  
(.268)  
DIA.  
4.5 0.05  
(.177 .002)  
12  
25  
(.472)  
(.984)  
6.0 0.1  
DIA.  
12  
30  
(.236 .004)  
(.472)  
(1.181)  
A
C
B
3.5  
(.138)  
10.0  
(.394)  
MM  
(INCHES)  
2.0  
DIMENSIONS:  
(.079)  
5.1  
(.201)  
TOLERANCES:  
0.3  
10.0 ~ 100  
(.394) ( .012) (.394 ~ 3.937) ( .020)  
10.0  
0.5  
=
=
UNDER  
Speci?cations are subject to change without notice.  
Customers should verify actual device performance in their speci?c applications.  
PEL12S - 12 mm Encoder with Illuminated Shaft  
Product Dimensions  
Suggested Filter Circuit  
5 VDC  
PEL12S-4xxxT-Nxxxx (Horizontal Mount w/Single LED, No Switch, Knurled Shaft w/Bushing)  
24.0  
(.945)  
10K OHMS  
10K OHMS  
10K OHMS  
10K OHMS  
TERMINAL B  
6.5  
(.256)  
17.5  
(.689)  
TERMINAL A  
0.01 μF  
7.0  
(.276)  
7.0  
(.276)  
0.3  
0.01 μF  
ENCODER  
TERMINAL C  
(.012)  
18 TEETH  
6.0  
0.75  
(.030)  
DIA.  
M9 X  
(.236)  
Quadrature Output Table  
CW  
PEL12S-4xxxG-Nxxxx (Horizontal Mount w/Single LED, No Switch, Flatted Shaft w/Bushing)  
OFF  
LM  
ON  
A Signal  
L1  
5.0  
(.199)  
L2  
L1  
LM  
L2  
B Signal  
5
11  
17.5  
D
(.197)  
(.433)  
(.689)  
CCW  
7
13.5  
20  
(.276)  
(.532)  
(.787)  
12  
18.5  
25  
0.75  
(.030)  
(.472)  
(.728)  
(.984)  
M9 X  
MM  
(INCHES)  
DIMENSIONS:  
TOLERANCES:  
0.3  
10.0 ~ 100  
(.394) ( .012) (.394 ~ 3.937) ( .020)  
10.0  
0.5  
=
=
UNDER  
LED Characteristics (Single)  
Power  
DC Forward  
Current  
(mA)  
Forward Voltage (V)  
Dissipation  
LED Color  
Red  
(mW)  
58  
53  
80  
100  
120  
Typ.  
1.8  
2.0  
3.5  
2.2  
3.4  
Max.  
2.3  
2.5  
4.0  
2.6  
4.0  
25  
25  
20  
30  
30  
Asia-Paci?c:  
Green  
Blue  
Orange  
White  
Tel: +886-2 2562-4117  
Fax: +886-2 2562-4116  
Europe:  
Tel: +41-41 768 5555  
Fax: +41-41 768 5510  
Notes:  
The Americas:  
Reverse Current:  
Reverse Voltage:  
10 μA  
Tel: +1-951 781-5500  
Fax: +1-951 781-5700  
5 VDC  
Test Condition (IF): 20 mA  
www.bourns.com  
REV. 05/12  
Speci?cations are subject to change without notice.  
Customers should verify actual device performance in their speci?c applications.