Analog Electronic Modules
12-93
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
Integration time in
milliseconds
16.7 20
Conversion time in ms 55 65
Cycle time in ms Number of active
channels per
module
conversion time
Resolution (including
overrange)
20 mA/13 bits +
sign
4 to 20 mA/13 bits
Suppression of Interference, Limits of Error
Interference voltage sup-
pression for f =
n x (f1"1%), (f1 = interfe-
rence frequency)
Series-mode
interference
(peak interference
value < rated value of
input range)
Min. 70 dB
Crosstalk between the in-
puts
Min. –50 dB
Operational limit (in the en-
tire temperature range, with
reference to the input
range)
"0.6%
Basic error limit (operational
limit at 25 C with reference
to input range)
"0.4%
Temperature error (with re-
ference to the input range)
"0.005%/K
Linearity error (with refe-
rence to the input range)
"0.01%
Repeatability
(in steady state at 25 C
with reference to input
range)
"0.05%
Data for Selecting a Sensor
Input range (rated
value)/input resistance
Current "20 mA/50Ω
4 to 20 mA/50 Ω
Permitted input current
(destruction limit)
40 mA
Smoothing of the measured
values
Yes, parameteriza-
ble in 4 steps by
means of digital filte-
ring
Step
None
Weak
Medium
Strong
Time constant
1 x cycle time
4 x cycle time
32 x cycle time
64 x cycle time
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