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Siemens MD 50.8 · 2017
Motor options
Mounted components
Encoder
6
■
Absolute encoder 1XP8024-21
The absolute encoder is available with SSI protocol and
HTL incremental signals up to motor frame size 132. This is
ideally suited to SINAMICS G120D.
Technical specifications
Connection assignment
For cable available as an option, see
"Encoder accessories
(continued)" from page 6/48
Absolute encoder
1XP8024-21
Supply voltage
U
P
10 … 30 V
Maximum current consumption without load
28 mA at 24 V
Absolute position values
SSI
• Code
Gray
• Positions per revolution
8 192 (13 bit)
• Differentiable revolutions
4 096
• Calculation time t
cal
5
s
Incremental signals
HTL
• Outputs
2 short-circuit-proof square-wave pulses
U
a1
,
U
a2
(maximum 1 min)
2 short-circuit-proof square-wave pulses
,
(maximum 1 min)
• Signal level
U
High
U
P
- 2.5 V
I
High
= 20 mA
U
Low
1.6 V
I
Low
= 20 mA
• Pulses per revolution
2 048
• Sampling rate
205 kHz
• Edge interval
0.43
s
Starting torque at 20 °C
0.01 Nm
Moment of inertia of rotor
4.3 x 10
-6
kgm
2
Maximum permissible mechanical speed
6 000 rpm
Vibration (55 … 2 000 Hz)
150 m/s
2
(EN 60068-2-6)
Shock (6 ms)
1 000 m/s
2
(EN 60068-2-27)
Degree of protection
IP66
Ambient temperature range
-20 °C to +40 °C
Connection system
page 6/47
1 m cable with 17-pole coupling socket, 0° coding
Weight, approx.
0.3 kg
Certification
CE, cUL-Rus
Order code
Q79
U
a1
U
a2
1
12
8
2
16
13
7
3
17
6
4
5
15
14
9
10
11
G_D087_XX_00011
Voltage supply
Incremental signals
Absolute position values
Other signals
Connection
U
P
●
Sen-
sor
U
P
●
0 V
●
Sen-
sor
0 V
●
Inner
shield
U
a1
U
a2
DATA
DATA
CLOCK
CLOCK
Count.
direction
Zeros
Flange socket (SSI)
7
1
10
4
11
15
16
12
13
14
17
8
9
2
5
Core color
brown/
green
blue
white/
green
white
green/
black
yellow/
black
blue/
black
red/
black
gray
pink
violet
yellow
black
green
U
a1
U
a2
© Siemens AG 2017