User guide
9
passes through the slots on the moving tracks, it creates
shadows at intervals. Where a shadow is detected, a low
state (0) is created. When the light successfully penetrates
the slot a high state (1) is created. The position of the shaft
is detected by reading the pattern of 1’s and 0’s. For higher
resolution single-turn encoders, incremental tracks are
added. These tracks enable the interpolation of signals.
Avago’s single-turn optical encoders provide high accuracy
read-out for applications which require precise positional
information. In addition, its use of the SSI non-proprietary
serial communication protocol means that encoders can
match most applications’ output requirements. These
absolute single-turn encoders come in a 13 and 16-bit
resolution package to cater to the needs of a range of
applications in the factory and industrial automation
industry such as robotic arms, valve controls, test and
measurement equipments etc.
In addition to the absolute single-turn optical encoders,
Avago also oers the options for absolute single-turn
magnetic encoders. This magnetic encoder solution is oered
in resolutions of 10 and 12-bits. The encoders are highly
robust and are able to tolerate operating temperatures up to
125ºC, making it ideal for industrial applications.
5.1.5 Absolute multi-turn encoders
Multi-turn encoders permit multiple turn counts. Multiple
turns are achieved by placing the multiple gear-head
module to the primary high resolution disk.
5.1 Selection Table: Encoders by Resolution
Incremental Part Number Resolution Max RPM Operating Temperature
Output
Type No. of Channels
Motor
Diameter Shaft Sizes
High
Resolution Range
(>2048CPR)
HEDR-5xxx series 1200-3600CPR < 5300 -40 - 100C Digital 3 -Channel 42 2 to 8mm
HEDC-5xxx 50-1024CPR >12000 -40 - 100C Digital 2 & 3-Channel 42 2 to 8mm
AEDB/T-9340 1000 - 2500CPR 4500 -10ºC - 85ºC / -40ºC - 115ºC Digital 3 & 6-Channel 42 3 to 12mm
Medium
Resolution
(up to 2048CPR)
HEDS-90xx/91xx/92xx 50 - 2048CPR >12000 -40ºC - 100ºC Digital 2 & 3-Channel 48 See Note 2
HEDS-97xx 96 - 2048CPR/ up to 480LPI >12000 -40ºC - 85ºC Digital 2-Channel 40 See Note 2
HEDL-90xx/91xx 1000 - 2000CPR >12000 -40ºC - 100ºC Digital 2 & 3-Channel 48 See Note 2
HEDB-9xxx 96 - 1024CPR >12000 -40ºC - 100ºC Digital 2 & 3-Channel 48 2 to 8mm
HEDx-55/56xx 50 - 1024CPR >12000 -40ºC - 70ºC/ -40ºC - 100ºC Digital 2 & 3-Channel 42 2 to 8mm
AEDR-8400 700 - 870CPR/254 & 318LPI < 3000 -20ºC - 85ºC Digital 2-Channel ≥10 See Note 2
AEDR-850x 294-304LPI 55kHz -20ºC - 85ºC Digital 3-Channel ≥ 10 See Note 2
AEAT-6600-T16 8, 16, 32, 64, 128, 256, 512,
1024 CPR
7000 -40ºC - 125ºC Digital 3-Channel ≥ 10 Not
applicable
Low Resolution
(512 CPR or less)
AEDB/T-9140 100 - 500CPR >12000 -10ºC - 85ºC / -40ºC - 115ºC Digital 3-Channel 31 3 to 12mm
HEDT-90xx/91xx 100 - 512CPR 12000 -40ºC - 125ºC Digital 2 & 3-Channel 48 See Note 2
AEDx-8xxx 500 CPR <30000 –40°C to 100°C Digital 2- & 3-Channel 20 2-5mm
AEDR-8300 100 - 580CPR/
36 - 212LPI
9000 -20ºC - 85ºC Digital 1 & 2-Channel ≥10 See Note 2
AEDR-8320 490CPR/ 180LPI 2450 -10ºC - 70ºC Analog 2-Channel ≥10 See Note 2
HEDR-542x 200CPR 4800 -10ºC - 85ºC Digital 2-Channel 23 2 to 5mm
Absolute
Part
Number Resolutions
Max
RPM
Operating
Temperature
Output
Signal
Motor
Diameter Shaft Sizes
Single Turn
AEAT-60xx 10 & 12-bit 12000 -40 to 125 ºC SSI 23 6mm
AEAT-6600-T16 10, 12, 14, 16 bits 7000 -40ºC - 125ºC SSI, PWM ≥ 10 Not applicable
AEAT-7000 13 bits 12000 -40ºC - 100ºC SSI 56 8mm
AEAT-9000/AEAT-9035 17 bits 12000 -40ºC - 115ºC SSI 40mm-60mm 6-12mm
Multi-Turn
AEAT-84AD 12-bit & 14-bit 12000 -40ºC - 125ºC SSI 56 Pinion, module 0.3,
14 teeth
Note:
1. CPR to LPI Conversion. CPR range is typical value for a 1-inch outer diameter (OD) codewheel.
2. Shaft size. Typically 2 – 8mm for 1-inch OD codewheel. Larger shaft sizes possible if used with a
larger OD codewheel.
3. Maximum RPM value is based on response frequency limitation of the encoder signal. Mechanical
limit may be higher.
4. Motor Diameter is suggested minimum OD of a motor that the encoder series can t into.
5. AEAT-60xx – magnetic encoder