Siemens SINAMICS S120 Equipment Manual page 235

Table 8- 5 Specification of measuring systems that can be connected
Parameter
Permissible signal level in bipolar
mode ;
1)
(TTL, SSI, HTL bipolar at X23)
Permissible signal frequency
Required edge clearance
Permissible zero pulse (with T
Switching threshold in the unipolar
mode and signals AN_SSI_XDAT,
1)
BN, RN at X23 connected to
M_Encoder
Switching thresholds in the unipolar
mode (see SINAMICS S120/S150
List Manual) and signals
AN_SSI_XDAT, BN, RN not
connected to X23
See SINAMICS S120/S150 List Manual for setting the mode
1)
Other signal levels according to the RS422 specification.
2)
The absolute level of the individual signals varies between 0 V and Vcc of the measuring system.
3)
See SINAMICS S120/S150 List Manual for setting the threshold
4)
Encoder cables
Encoder type
TTL
HTL unipolar
HTL bipolar
SSI
100 m with remote sense
1)
Because the transmission technology is more robust, the bipolar connection should always be
2)
used. The unipolar connection should only be used if the encoder type does not output push-pull
signals.
For the cable length, see the diagram "Maximum cable lengths depending on the SSI baud rate for
3)
SSI encoders"
Note
Prefabricated cable for 5 V TTL encoder
When using a 5 V TTL encoder (6FX encoder), use connecting cable 6FX8002-2CR00-....
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
Designation
U
diff
2)3)
f
S
t
min
= 1/f ) Length
s s
Center of the
pulse position
U
(Switch)
U
(Switch)
1)
2)
3)
Control Units, Control Unit Adapters and operating components
8.3 Control Unit CU310-2 PN (PROFINET)
Threshold Min.
- 2.0
- -
- 100
- ¼ · T
- 50
High 8.4
4)
Low 3.5
4)
High 9
4)
Low 5.9
4)
Maximum encoder cable length in m
100
100
300
up to 100 (depending on the baud rate)
Type Max.
- Vcc
- 500
- -
- ¾ · T
s s
135 220
10.6 13.1
4.8 6.3
11.3 13.8
7.9 10.2
Unit
V
kHz
ns
-
degrees
V
V
V
V
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