SIEMENS
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Siemens D 21.4 · 2017
SIMOTICS servomotors
Technical definitions for AC motors
8
■
Overview
(continued)
Multi-turn absolute encoder
This encoder outputs an absolute angular position between 0°
and 360° in the specified resolution. An internal measuring gear-
box enables it to differentiate 4096 revolutions.
So with a ball screw, for example, the absolute position of the
slide can be determined over a long distance.
Multi-turn absolute encoder
Single-turn absolute encoder
This encoder outputs an absolute angular position between 0°
and 360° in the specified resolution. In contrast to the multi-turn
absolute encoder, it has no measuring gearbox and can there-
fore only supply the position value within one revolution. It does
not have a traversing range.
t
1
3
n
t
.
t
t
n
n
-1
n
-2
2
1
2
msb
lsb
t
Data
Clock
Code signals
Incremental signals
A
B
G_PM21_EN_00104
Absolute encoders without
DRIVE-CLiQ interface
AM2048S/R
encoder
Absolute encoder 2048 S/R, 4096 revolutions,
multi-turn, with EnDat interface
AM512S/R
encoder
Absolute encoder 512 S/R, 4096 revolutions,
multi-turn, with EnDat interface
AM32S/R
encoder
Absolute encoder 32 S/R, 4096 revolutions,
multi-turn, with EnDat interface
AM16S/R
encoder
Absolute encoder 16 S/R, 4096 revolutions,
multi-turn, with EnDat interface
AS2048S/R
encoder
Absolute encoder 2048 S/R, single-turn
Absolute encoders with
DRIVE-CLiQ interface
AM24DQI
encoder
Absolute encoder, 24 bit (resolution 16777216,
internal encoder 2048 S/R) + 12 bit multi-turn
(traversing range 4096 revolutions)
AM20DQI
encoder
Absolute encoder, 20 bit (resolution 1048576,
internal 512 S/R) + 12 bit multi-turn
(traversing range 4096 revolutions)
AM22DQ
encoder
Absolute encoder, 22 bit (resolution 4194304,
internal encoder 2048 S/R) + 12 bit multi-turn
(traversing range 4096 revolutions)
AM20DQ
encoder
Absolute encoder, 20 bit (resolution 1048576,
internal 512 S/R) + 12 bit multi-turn
(traversing range 4096 revolutions)
AM16DQ
encoder
Absolute encoder, 16 bit (resolution 65536,
internal 32 S/R) + 12 bit multi-turn
(traversing range 4096 revolutions)
AM15DQ
encoder
Absolute encoder, 15 bit (resolution 32768,
internal 16 S/R) + 12 bit multi-turn
(traversing range 4096 revolutions)
AS24DQI
encoder
1)
Absolute encoder, single-turn, 24 bit
(resolution 16777216)
AS20DQI
encoder
1)
Absolute encoder, single-turn, 20 bit
(resolution 1048576)
Technical specifications
Absolute encoders without
DRIVE-CLiQ interface
Supply voltage
5 V
Absolute position interface
via EnDat 2.1
• Traversing range (multi-turn)
2)
4096 revolutions
Incremental signals
(sinusoidal 1 V
pp
)
• Signals per revolution
2048/512/32/16
Absolute encoders with
DRIVE-CLiQ interface
Supply voltage
24 V
Absolute position via DRIVE-CLiQ
• Resolution within one revolution
2
24
/2
22
/2
20
/2
16
/2
15
bit
• Traversing range (multi-turn)
2)
4096 revolutions
1)
Not for absolute encoder, single-turn AS
2)
The single-turn absolute encoder is used for the previous incremental
encoders.
© Siemens AG 2017