Siemens ET 200S - Page 433

Analog Electronic Modules
12-77
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Analog Value Generation
Measuring principle Integrative
Integration and cycle
time/resolution per channel:
 Integration time
parameterizable
Yes
 Interference frequency
suppression in Hz
60 50 No
 Integration time in
milliseconds
16.7 20 2.5
 Conversion time in ms 25 30 10
 Cycle time in ms
– 1 channel active per
module
– 2 channels active
per module
25 30 10
58.3 70 26
 Resolution (including
overrange)
"10 V/ 15 bits
+sign
"5 V/ 15 bits + sign
1 to 5 V/ 15 bits
Suppression of Interference, Limits of Error
Interference frequency
suppression for f =
n x (f1  0.5%),
(f1 = interference
frequency)
 Common-mode
interference (U
pp
)
 Series-mode
interference
(peak interference
value < rated value of
input range)
 Crosstalk between the
inputs
Min. 100 dB
Min. 90 dB
Min. –100 dB
Operational limit
(entire temperature range
with reference to input
range; calibration enabled
1
)
"0.1%
Operational limit
(entire temperature range
with reference to input
range; calibration disabled)
"0.5%
Basic error limit (operational
limit at 25C with reference
to input range; calibration
enabled
1
)
"0.05%
Temperature error (with
reference to input range;
calibration enabled
1
)
"0.003%/K
Temperature error (with
reference to input range;
calibration disabled)
"0.015%/K
Linearity error (with
reference to the input
range)
"0.03%
Repeatability
(in steady state at 25 C
with reference to input
range)
"0.01%
Data for Selecting a Sensor
Input range (rated
value)/input resistance
 Voltage "10 V/min. 1 MΩ
"5 V/min. 1 MΩ
1 to 5 V/min. 1 MΩ
Permitted input voltage
(destruction limit)
35 V continuous,
75 V for max. 1 ms
Smoothing of the measured
values
Yes,
parameterizable in 4
steps by means of
digital filtering
Step
None
Weak
Medium
Strong
Time constant
1 x cycle time
4 x cycle time
32 x cycle time
64 x cycle time
1
Run-time calibration can be enabled at module
parameter assignment to adjust for component
drift due to changes in ambient temperature.
During the calibration interval, new data
updates will be delayed for 250 ms. Calibration
takes place every time there is a 5°C change
in ambient temperature.