Siemens S120 - Page 266

Control Units, Control Unit Adapters and operating components
7.3 Control Unit CU310-2 PN (PROFINET)
AC Drive
266 Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
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 7- 4 Specification of measuring systems that can be connected
Parameter
Designation
Threshold
Min.
Type
Max.
Unit
Permissible signal level in bipolar
mode
1)
;
(TTL, SSI, HTL bipolar at X23)
2)3)
U
diff
2,0 Vcc 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 position
50 135 220 degrees
Switching threshold in the unipolar
mode
1)
and signals AN_SSI_XDAT,
BN, RN at X23 connected to
M_Encoder
U
(Switch)
High
4)
8,4
10,6
13,1
V
Low
4)
3,5 4,8 6,3 V
Switching thresholds in the unipolar
mode (see SINAMICS S120/S150
List Manual) and signals
AN_SSI_XDAT, BN, RN not
connected to X23
U
(Switch)
High
4)
9
11,3
13,8
V
Low
4)
5,9 7,9 10,2 V
1)
See SINAMICS S120/S150 List Manual for setting the mode
2)
Other signal levels according to the RS422 specification.
3)
The absolute level of the individual signals varies between 0 V and Vcc of the measuring system.
4)
See SINAMICS S120/S150 List Manual for setting the threshold