Siemens SINAMICS S120 Equipment Manual page 258

Control Units, Control Unit Adapters and operating components
8.4 Control Unit CU310-2 DP (PROFIBUS)
NOTICE
Damage to motor due to incorrectly connected KTY temperature sensor
If a KTY temperature sensor is connected with incorrect polarity, it is not possible to detect
when the motor overheats. Overheating can cause damage to the motor.
• Connect a KTY temperature sensor with the correct polarity.
Note
There are two ways of connecting the temperature sensor:
1. via X120, terminals 1 and 2
2. via X23, pins 1 and 8
Encoders that can be connected
Note
Use of bipolar and unipolar encoders
Use bipolar encoders.
When using unipolar encoders, the unused negative track signals can either be connected or
connected to ground. This results in different switching thresholds.
Table 8- 27 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)
256
Designation
U
diff
2)3)
f
S
t
min
= 1/f ) Length
s s
Center of the
pulse position
U
(Switch)
U
(Switch)
Threshold Min.
- 2.0
- -
- 100
- ¼ · T
s
- 50
High 8.4
4)
Low 3.5
4)
High 9
4)
Low 5.9
4)
Type Max. Unit
- Vcc V
- 500 kHz
- - ns
- ¾ · T -
s
135 220 degrees
10.6 13.1 V
4.8 6.3 V
11.3 13.8 V
7.9 10.2 V
Manual, 06/2019, 6SL3097-5AL00-0BP1
AC Drive