Siemens SINAMICS S120 Combi Manual page 80

S120 Combi Power Modules
4.3 Interface description
Table 4- 15 Specification of TTL encoder systems that can be connected
Parameter
Signal level, high
1)
Signal level, low
1)
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)
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
2)
ALo-BHi
track B.
Further information on setting the "Zero pulse active time" can be found in the following:
3)
References: SINAMICS S120 Drive Functions Function Manual, Section "Tolerant encoder monitoring"
80
Designation
U
Hdiff
U
Ldiff
f
S
t
min
t
Lo
t
Hi
3)
Threshold Min.
2
-5
-
100
640
640
Manual, 11/2017, 6SL3097-4AV00-0BP7
Max. Unit
5 V
-2 V
300 kHz
- ns
(t - t )/2 ns
2)
ALo-BHi Hi
t - 2*t ns
Lo 2)
ALo-BHi
SINAMICS S120 Combi