NOTICE
Motor overheating due to an incorrectly connected KTY temperature sensor
A sensor connected with the incorrect polarity cannot detect the motor overheating.
Connect the KTY temperature sensor with the correct polarity.
For more information on the temperature sensors and how to use them, see the SINAMICS
S120 Commissioning Manual, in Chapter Temperature sensors for SINAMICS components.
Note
There are two ways of connecting the temperature sensor:
1. Via X120, terminal 1 and 2
2. Via X23, pins 1 and 8
Table 4-15 Specication of measuring systems that can be connected
Parameter Designation Threshold Min. Type Max. Unit
Permissible signal level in the bipolar mode
(parameter p0405.1=1);
(TTL, SSI, HTL bipolar at X23)
1), 2)
U
di
2,0 V
CC
V
Permissible signal frequency f
S
- 500 kHz
Required edge clearance t
min
100 - ns
Permissible zero pulse (with T
s
= 1/f
s
) Length ¼ · T
s
¾ · T
s
Center of the pulse posi‐
tion
50 135 220 Degrees
Switching threshold in the unipolar mode
(parameter p0405.0=0) and signals
AN_SSI_XDAT, BN, RN at X23 connected to
M_Encoder
3)
U
(Schalt)
High
4)
(p0405.4=1)
8,4 10,6 13,1 V
Low
(p0405.4=0)
3,5 4,8 6,3 V
Switching threshold in the unipolar mode
(parameter p0405.0=0) and signals
AN_SSI_XDAT, BN, RN not connected to X23
U
(Schalt)
High
4)
(p0405.4=1)
9 11,3 13,8 V
Low
(p0405.4=0)
5,9 7,9 10,2 V
1)
Other signal levels according to the RS422 specication.
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 mode.
4)
See SINAMICS S120/S150 List Manual for setting the threshold.
Note
We recommend that bipolar encoders are used
When using unipolar encoders, the unused negative track signals can either be connected or
connected to ground. This results in dierent switching thresholds.
Interfaces
4.5 Encoder interface (HTL/TTL/SSI)
SIMOTION D410-2
56 Equipment Manual, 07/2021, A5E33446720B
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