Siemens SIMATIC ET 200S - Page 451

Analog Electronic Modules
12-45
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Analog Value Formation
Measurement principle integrating
Integration and cycle time /
resolution per channel:
• Integration time
selectable
Yes
• Interference frequency
suppression in Hz
60 50
• Integrationtimeinms 16,7 20
• Conversion time in ms 55 65
• Cycletimeinms Number of active
channels per
module
¢
conversion time
• Resolution (incl.
overshoot range)
¦ 10 V/ 13 Bit + VZ
¦ 5V/13Bit+VZ
1to5V/13bits
Interference Suppression, Error Limits
Interference voltage sup-
pression for f= n x (f1¦
1%), (f1 = interference fre-
quency)
• Common mode
interference (U
SS
)
• Common mode
interference
(peak value of
interference < rated
value of the input range)
• Crosstalk between
inputs
min. 90 dB
min. 70 dB
min. --50 dB
Operational error limits
(across complete tempera-
ture range, in relation to in-
put range)
 0.6 %
Basic error limit (operational
error limit at 25 _C, related
to the input range)
0.4 %
Temperature error (in rela-
tion to input range)
0.01 %/K
Linearity error (relative to
the input range)
0.01 %
Repetition accuracy
(in transient state at 25 _C,
relative to input range)
0.05 %
Data for selection of the sensor
Input range (rated
value)/input resistance
• Voltage 5 V/min. 100 kΩ
1 up to 5 V/min.100
kΩ
10 V/min. 100 kΩ
Permitted continuous input
voltage (destruction limit)
35 V continuous,
75 V for max. 1 ms
(sampling ratio 1:20)
Smoothing of measured
values
Yes, configurable in
4 stages by digital
filtering
Level
No
weak
medium
strong
Time constant
1 x cycle time
4 x cycle time
32 x cycle time
64 x cycle time