Siemens S120 Manual page 374

Supplementary system components and encoder system integration
8.1 Sensor Modules
Connectable encoder systems
Table 8- 18 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 RS 422 standard.
1)
The absolute level of the individual signals varies between 0 V and VCC of the encoder system.
2)
Only with order number 6SL3055-0AA00-5CA2 and firmware version 2.5 SP1 or higher can this value be configured
3)
using software. For older firmware releases and Order Nos. less than 6SL3055-0AA00-5CA2 then the "low" threshold
applies.
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
4)
ALo-BHi
track B.
Additional information on setting the "Zero pulse active time" can be found in the manual: SINAMICS S120, Function
5)
Manual, tolerant encoder monitoring for SMC30
374
Designation
U
Hdiff
1)
U
Ldiff
1)
U
3)
H
U
3)
L
U
Hdiff
U
Ldiff
U
Hdiff
1)
U
Ldiff
1)
f
S
t
min
t
Lo
t
Hi
5)
Threshold Min.
2
-5
High 17
Low 10
High 0
Low 0
3
-V
CC
2
-5
-
100
640
640
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
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
4)
ALo-BHi Hi
t - 2*t ns
Lo 4)
ALo-BHi
AC Drive