Siemens SINAMICS S120 Combi - Page 89

S120 Combi Power Modules
4.3 Interface description
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
89
Table 4- 14 Technical data of the encoder system supply
Encoder system supply
Unit
Value
Voltage
V
DC
5 (with or without remote sense)
1)
Current A
DC
0,35
Encoder frequency that can be evaluated (f
encoder
)
kHz
≤ 300
1)
A controller compares the encoder system supply voltage - sensed via the remote sense cables - with the reference
supply voltage of the encoder system, and adjusts the supply voltage for the encoder system at the output of the drive
module until the required supply voltage is obtained directly at the encoder system.
Table 4- 15 Specification of TTL encoder systems that can be connected
Parameter
Designation
Threshold
Min.
Max.
Unit
Signal level, high
1)
U
Hdiff
2
5
V
Signal level, low
1)
U
Ldiff
-5
-2
V
Signal frequency
f
S
-
300
kHz
Edge clearance
t
min
100
-
ns
"Zero pulse inactive time"
(before and after A=B=high)
t
Lo
640 (t
ALo-BHi
- t
Hi
)/2
2)
ns
"Zero pulse active time"
(while A=B=high and beyond)
3)
t
Hi
640 t
ALo-BHi
- 2*t
Lo
2)
ns
1)
Other signal levels according to the RS 422 standard.
2)
t
ALo-BHi
is not a specified value, but is the time between the falling edge of track A and the next but one rising edge of
track B.
3)
Further information on setting the "Zero pulse active time" can be found in the following:
References: SINAMICS S120 Function Manual (FH1), tolerant encoder monitoring for SMC30