Analog value generation
Measuring principle
Integration and cycle time/
resolution per channel:
•
Integration time
parameterizable
•
Interference frequency
suppression in Hz
•
Integration time in
milliseconds
•
Conversion time in ms
•
Cycle time in ms
•
Resolution (including
overrange)
Suppression of interference, limits of error
Interference voltage sup-
pression for
f = n x (f1"1%),
(f1 = interference fre-
quency)
•
Series-mode
interference
(peak interference
value < rated value of
input range)
Crosstalk between the in-
puts
ET 200S Distributed I/O System
EWA-4NEB780602402-09
Integrative
Yes
60
50
16.7
20
55
65
Number of active
channels per
module
conversion time
20 mA/13 bits +
$
sign
4 to 20 mA/13 bits
Min. 70 dB
Min. –50 dB
Analog Electronic Modules
Operational limit (in the en-
tire temperature range, with
reference to the input
range)
Basic error limit (operational
limit at 25 _C with reference
to input range)
Temperature error (with re-
ference to the input range)
Linearity error (with refe-
rence to the input range)
Repeatability
(in steady state at 25 _C
with reference to input
range)
Data for selecting a sensor
Input range (rated
value)/input resistance
•
Current
Permitted input current
(destruction limit)
Smoothing of the measured
values
Step
None
Weak
Medium
Strong
"0.6%
"0.4%
"0.005%/K
"0.01%
"0.05%
"20 mA/50W
4 to 20 mA/50 W
40 mA
Yes, parameteriza-
ble in 4 steps by
means of digital filte-
ring
Time constant
1 x cycle time
4 x cycle time
32 x cycle time
64 x cycle time
13-67