Siemens SINAMICS DCM Operating Instructions Manual page 162

Additional system components
7.2 Sensor Module Cabinet-Mounted SMC30
Parameter
Signal frequency
Edge clearance
"Zero pulse inactive time"
(before and after A=B=high)
"Zero pulse active time"
(while A=B=high and beyond)
Other signal levels according to the RS 422 standard
1)
The absolute level of the individual signals varies between 0 V and V
2)
system.
t
3)
ALo-BHi
next but one rising edge of track B.
Further information on setting the "Zero pulse active time" can be found in the following:
4)
References: /FH1/ SINAMICS S120, Function Manual, tolerant encoder monitoring for
SMC30
Table 7- 12 Connectable encoders
HTL bipolar 24 V
HTL unipolar 24 V
1)
TTL bipolar 24 V
TTL bipolar 5 V
SSI 24 V/5 V
TTL unipolar
Because the physical transmission properties are more robust, the bipolar connection
1)
should always be used. The unipolar connection should only be used if the encoder type
does not output push-pull signals.
A controller compares the encoder system supply voltage - sensed via the Remote Sense
2)
cables - with the reference supply voltage of the encoder system, and adjusts the supply
voltage for the encoder system at the output of the drive module until the required supply
voltage is obtained directly at the encoder system (only for 5 V encoder system power
supply).
Table 7- 13
Encoder type
TTL
HTL unipolar
HTL bipolar
SSI
For TTL encoders at X520 → Remote Sense → 100 m
1)
Because the physical transmission properties are more robust, the bipolar connection
2)
should always be used. The unipolar connection should only be used if the encoder type
does not output push-pull signals.
162
Designation
f
S
t
min
t
Lo
t
Hi
4)
is not a specified value, but is the time between the falling edge of track A and the
X520
(D-Sub) (terminal)
No/yes
No/yes
connection is recommended)
Yes
Yes
Yes
Maximum encoder cable length
1)
2)
Threshold Min.
-
100
500
500
X521 X531
(terminal)
Yes
Yes (however, a bipolar
Yes
Yes
Yes
No
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619
Max.
300
-
(t - t )/2
ALo-BHi Hi
t - 2*t
Lo 3)
ALo-BHi
CC
Track
monitoring
No/yes
No
1)
Yes
Yes
No
Maximum encoder cable length
100 m
100 m
300 m
100 m
SINAMICS DCM Control Module
Unit
kHz
ns
ns
3)
ns
of the encoder
Remote Sense
2)
No
No
No
To X520
No