Siemens SINAMICS S120 Equipment Manual page 343

Note
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
The Booksize Cabinet Kit with Double Motor Module has two of these Sensor Modules built
in.
Table 8- 9 Specification of measuring 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 RS 422 standard.
1)
The absolute level of the individual signals varies between 0 V and V
2)
system.
t
3)
ALo-BHi
next but one rising edge of track B.
The threshold can be set via p0405.04 (switching threshold); the factory setting is "Low".
4)
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
8.8 K50, SMC30 Sensor Module Cabinet-Mounted for TTL, HTL, and SSI encoders
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
is not a specified value, but is the time between the falling edge of track A and the
Threshold Min.
2
-5
High 17
Low 10
High 0
Low 0
3
-V
CC
2
-5
-
100
500
500
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
3)
ALo-BHi Lo
of the measuring
CC
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