Siemens SINAMICS S120 Manual page 184

Control Units
6.2 Control Unit CU310 DP (PROFIBUS)
Table 6-8 Specification, measuring systems that can be connected
Parameters
High signal level
(TTL bipolar at X23)
1)
Low signal level
(TTL bipolar at X23)
1)
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 X23)
1)3)
Low signal level
(SSI bipolar at X23)
1)3)
Signal frequency
Edge clearance
Zero pulse (with T = 1/f )
s s
Other signal levels according to the RS422 standard.
1)
The absolute level of the individual signals varies between 0 V and V
2)
system.
Only from Order No. 6SL3040-0LA00-0AA1 and Firmware 2.5 SP1.
3)
Note
We recommend that bipolar encoders are used.
When using uni-polar encoders, the 15-pin sub D connector should be opened and
jumpered.
The signals that are not used should be connected to ground.
184
Designation Threshold
U
Hdiff
V
Ldiff
U : High
H
Low
U High
L
Low
U
Hdiff
V
Ldiff
U
Hdiff
V
Ldiff
f
S
t
min
Length
Center of the
pulse position
Min. Type
2
-5
17
10
0
0
3
-V
CC
2
-5
-
100
¼ · T
s
50 135
Manual, (GH6), 07/2007 Edition, 6SL3097-2AL00-0BP2
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
500 kHz
- ns
¾ · T
s
220 Degrees
of the measuring
CC
AC Drive