Siemens SINAMICS S110 - Page 142

CU305 Control Units
7.3 Interface description
SINAMICS S110
142 Manual, 07/2015, 6SL3097-4AC10-0BP5
Encoder connection
We always recommend that bipolar encoders are used.
When using unipolar encoders the unused negative track signals can either be left
unconnected or connected to ground. This results in different switching thresholds.
Table 7- 11 Specification, measuring systems that can be connected
Parameter
Designation
Unit
Threshold
Min.
Type
Max.
Permissible signal level in
bipolar mode
1)
;
(TTL, SSI, HTL bipolar at
X23)
2)3)
U
diff
V 2.0 V
CC
Permissible signal frequency
f
S
kHz
-
500
Required edge clearance
t
min
ns
100
-
Permissible zero pulse (with T
s
= 1/f
s
)
Length
¼ · T
s
¾ · T
s
Center of the
pulse posi-
tion
Degrees 50 135 220
Switching threshold in the
unipolar mode
1)
and signals
AN_SSI_XDAT, BN, RN at X23
connected to M_Encoder
U
(Switch)
V
High
4)
8.4
10.6
13.1
V Low
4)
3.5 4.8 6.3
Operating points in unipolar
mode
1)
and signals
AN_SSI_XDAT, BN, RN not
connected to X23
U
(Switch)
V
High
4)
9
11.3
13.8
V Low
4)
5.9 7.9 10.2
1)
For the relevant parameters for setting the mode, see the SINAMICS S110 List Manual
2)
Other signal levels according to the RS422 specification.
3)
The absolute level of the individual signals varies between 0 V and V
CC
of the measuring system.
4)
For the relevant parameters for setting the switching threshold, see the SINAMICS S110 List
Manual
Note
Prefabricated cable for 5 V TTL encoder
If a
5 V TTL encoder (6FX encoder) is used, the connecting cable 6FX8002-2CR00-.... has
to be used.