Siemens SINAMICS S120 Manual page 377

Note
Prefer a bipolar connection
Because the physical transmission media is more robust, the bipolar connection should
always be used for HTL encoders. The unipolar connection should only be used if the
encoder type does not output push-pull signals.
Note
Only connect one encoder system
Only one encoder system may be connected to the encoder module, either at X520 or at
X521/X531. The corresponding unused interface must not be used.
Table 9- 26 Specification of encoder systems that can be connected
Parameter
High signal level
(TTL bipolar at X520 or X521/X531)
Low signal level
(TTL bipolar at X520 or X521/X531)
High signal level
(HTL unipolar)
Low signal level
(HTL unipolar)
High signal level
(HTL bipolar)
2)
Low signal level
(HTL bipolar)
2)
High signal level
(SSI bipolar at X520 or X521/X531)
Low signal level
(SSI bipolar at X520 or X521/X531)
Signal frequency
Edge clearance
Zero pulse inactive time
(before and after A=B=high)
Zero pulse active time
(while A=B=high and beyond)
Other signal levels according to the RS422 standard.
1)
The absolute level of the individual signals varies between 0 V and V
2)
t is not a specified value, but is the time between the falling edge of track A and the next but one rising edge of
3)
ALo-BHi
track B.
The threshold can be set via p0405.04 (switching threshold); the setting when delivered is "Low".
4)
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A
Designation
U
Hdiff
1)
U
Ldiff
1)
U
4)
H
U
4)
L
U
Hdiff
U
Ldiff
U
Hdiff
1)
U
Ldiff
1)
f
S
t
min
t
Lo
t
Hi
9.14 K50, Sensor Module Cabinet-Mounted SMC30
Thresh- Min.
old
2
-5
High 17
Low 10
High 0
Low 0
3
-V
CC
2
-5
-
100
640
640
of the encoder system.
CC
Options
Max. Unit
5 V
-2 V
V V
CC
V V
CC
7 V
2 V
V V
CC
-3 V
5 V
-2 V
300 kHz
- ns
(t - t )/2 ns
3)
ALo-BHi Hi
t - 2 x t ns
Lo 3)
ALo-BHi
375