® Electrocomponents Series 288 Data Sheet Rotary Encoder Commercial Miniature 16mm Size Rotary Encoder Features Robust Construction 2-bit Incremental or 4-bit Absolute Encoder Optional Momentary Switch Available with 16 Detents Continuous Rotation Bushing Mount Solder Lug or PCB Terminals RoHS Compliant Electrical and Mechanical Specifications Encoder: Contact Resistance Voltage Rating Temperature Range Operating: -25°C to +100°C Storage: -30°C to +100°C Detent Points 16 detents available Rotational Torque No Detent: 36 - 216 gf.cm With Detent: 100 - 500 gf.cm Rotational Life 50,000 cycles Solder Heat Resistance 260°C for 5 seconds Resolution 2-bit: 4, 6, 8,10 or 12 pulses in 360° 4-bit: 16 combinations in 360° Push-Pull Strength of Shaft 8 kg minimum for 10 seconds Insulation Resistance 1-4 CTS Electrocomponents Special Consult CTS for customized or features not listed, including other detent points, resolution, torque and mounting style. © 2015 CTS Corporation. All rights reserved. Information subject to change. 4/27/15 www.ctscorp.com Electrical and Mechanical Specifications (continued) Optional Momentary Switch: Switch Contact Resistance Switch Operating Force 350 ± 150 g (12.3 ± 5.3 oz.) Switch Life 15,000 operations Switch Travel 0.5mm (.020”) Switch Rating Switch Bounce Truth Table 4 BIT GRAY CODE POS. POS. NO. POS. DENOTES CONTACT CLOSURE TO COMMON NO. 2 BIT BINARY CODE DENOTES B CONTACT CLOSURE TO A COMMON 4 BIT HEXADECIMAL CODE A 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 46 47 48 B E F 0 0 0 0 0 0 0 0 1 0 1 0 1 1 1 1 0 1 0 1 0 1 0 1 1 1 1 1 1 0 1 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DENOTES CONTACT CLOSURE TO COMMON A B E F 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 288X Typical 2-bit Encoder parallel to P.C. Board MTG. SURFACE 10.2±0.4 .402±.016 "L"± 0.8 .031 10.00±0.05 .394±.002 18.0 .709 0.4 "A"±.016 MAX. 5.00±0.05 .197±.002 8.5 .335 7.9±0.13 .311±.005 MTG. SURFACE MAX. 6.83 .269 11.20 .441 12.50 .492 B 3/8-32UNEF-2A C A C A Ø1.40 (3) .055 B mm INCH DIMENSION : 16.4 .646 2-288X Typical 4-bit Encoder parallel to P.C. Board MTG. SURFACE 18.0 .709 MTG. SURFACE MAX. 3.68 REF. .145 3/8-32UNEF-2A 8.5 .335 7.9±0.13 .311±.005 11.2 .441 MAX. 12.5 .492 B C A F D E 8.10±0.05 .319±.002 Ø1.40 (6)HL'S. .055 0.4 "A"± .016 15.1±0.4 .594±.016 2-4 CTS Electrocomponents 0.8 "L"± .031 A E D 5.00±0.05 .197±.002 B C F 16.4 .646 10.00±0.05 .394±.002 DIMENSION : © 2015 CTS Corporation. All rights reserved. Information subject to change. mm INCH 4/27/15 www.ctscorp.com 288T Typical 2-bit Encoder With Solder Lug Terminals MTG. SURFACE 10.2±0.4 .402±.016 "L"±0.8 ±.031 MAX. 18.0 .709 "A"±0.4 ±.016 MAX. 8.5 .335 7.9±0.13 .311±.005 11.2 .441 3/8-32UNEF-2A 7.3 .284 A C B 2.18X1.52 HL'S(3) .086X.060 2.92±0.08 .115±.003 16.4 .646 DIMENSION : mm INCH 288V Typical 2-bit Perpendicular to P.C. Board MTG. SURFACE 10.2±0.4 .402±.016 3/8-32UNEF-2A 18.0 .709 MAX. 8.5 .335 7.9±0.13 .311±.005 10.00±0.08 .394±.003 5.00±0.05 .197±.002 MAX. CENTER LINE OF ENCODER 12.5 .492 A 6.4 .252 C Ø1.40(3) HL'S 12.70 .500 0.4 "A"± .016 .055 B A C B 16.4 .646 0.8 "L"± .031 DIMENSION : mm INCH MC-288V Typical 2-bit Encoder With Momentary Switch Perpendicular to P.C. Board MTG. SURFACE 12.26 .483 10.76 MAX. 18.0 .709 3/8-32UNEF-2A .424 "L"± 0.8 .031 7.9±0.13 .311±.005 (2) HL'S Ø1.70 (2) .067 Ø1.40 (3) HL'S .055 C 2.5±0.13(2) .098±.005 5.00±0.13 (2) .197±.005 A 12.5 .492 S1 S2 B 8.5 MAX. .335 7.0±0.13 .276±.005 A 4.87 .192 "A"± 0.5 TRAVEL .020 (REFERENCE) 0.4 .016 C B 13.30±0.13 .524±.005 16.4 .646 DIMENSION : mm INCH Typical 2-bit Encoder With Momentary Switch Parallel to P.C. Board MC-288X 12.26 .483 MTG. SURFACE 18.0 3/8-32 UNEF-2A 10.76 .424 MAX. 10.00±0.08 .394±.003 .709 MTG. SURFACE 5.00±0.05 .197±.002 8.5 MAX. .335 7.9±0.13 .311±.005 6.83 .269 12.5 .492 B C A 0.5 TRAVEL .020 (REFERENCE) Ø1.40 (5)HL'S. A "A"± 0.4 .016 4.0 "L"± 0.8 .157 C 3.07±0.13 B 1.00±0.13(5) 0.39±.005 .031 S2 .121±.005 2.5±0.05 .098±.002 16.4 .646 3-4 CTS Electrocomponents © 2015 CTS Corporation. All rights reserved. Information subject to change. S1 2.5±0.05 .098±.002 DIMENSION : mm INCH 4/27/15 www.ctscorp.com Shaft Trim “X” “Z” “Y” “Z” “W” “X” “X” “Y” “X” “Y” “Z” R - ROUND X Y Z Imperial Shaft .250” .046” .062” Metric Shaft 6.00 1.17 1.57 W X Y Z Imperial Shaft .236” .062” .344” 24 TEETH Metric Shaft 6.00 1.57 7.0 18 TEETH X Y Z Imperial Shaft .250” .156” .375” 6.00 4.50 7.00 Metric Shaft X Imperial Shaft .250” Metric Shaft 6.00 S - SLOTTED K - KNURLED & SLOTTED F - FLATTED DIMENSION: inch mm Ordering Information B T 288 24 F 40 2 A 1 TERMINAL STYLE SHAFT TRIM ENCODER CODE DETENT * T – SOLDER LUG X – PC **V – PC FORMED TO REAR R – ROUND F – FLATTED K – KNURLED & SLOTTED S – SLOTTED 1 – 2 BIT BINARY * 2 – 4 BIT GRAY * 3 – 4 BIT HEXADECIMAL 1 – NONE 2 – 16 DETENTS * Not available in switch construction. * 16 COMBINATION ONLY **Not available with 4 bit code "A" BUSHING LENGTH mm A=5.0mm B=6.35mm C=7.0mm D=9.53mm ALL M8X.75P SWITCH A – NONE * B – MOMENTARY SWITCH inch 2=.250" 3=.375" 8=1.000" ALL 3/8-32 UNEF-2A * 2 BIT MODELS ONLY "L" SHAFT LENGTH mm A0=10mm A5=15mm B0=20mm B5=25mm C0=30mm C5=35mm ALL 6.0mm Dia. inch 20=.625" 24=.750" 28=.875" 32=1.000" ALL .250" Dia. COMBINATION (RESOLUTION) 16 - 16 COM (4 PULSES - 2 bit) - 16 COM (1 PULSE - 4 bit) 24 - 24 COM (6 PULSES) 32 - 32 COM (8 PULSES) 40 - 40 COM (10 PULSES) 48 - 48 COM (12 PULSES) Please consult CTS for customized or features not listed. 4-4 CTS Electrocomponents © 2015 CTS Corporation. All rights reserved. Information subject to change. 4/27/15 www.ctscorp.com