Siemens SIMATIC ET 200S - Page 503

Analog Electronic Modules
12-97
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Analog Value Formation
Measurement principle integrating
Integration / conversion
time / resolution per chan-
nel:
• Integration time
selectable
Yes
• Interference frequency
suppression in Hz
60 50
• Integrationtimeinms 16.7 20
• Basic conversion time
incl. integration time in
ms
66 80
• Additional conversion
time for wire break
diagnostics in ms
55
• Cycletimeinms Number of active
channels per
module x conversion
time
• Resolution (incl.
overshoot range)
15 bits + sign
Interference Suppression, Error Limits
Interference voltage sup-
pression for f= n x
(f11 %), (f1 = interference
frequency)
• Common mode
interference (U
SS
)
• Common mode
interference
(peak value of
interference < rated
value of the input range)
min. 90 dB
min. 70 dB
Crosstalk between inputs min. --50 dB
Operational error limit for
80 mV (across complete
temperature range, in rela-
tion to input range)
0.1 %
Operational error limit for
thermocouple (across com-
plete temperature range, in
relation to input range)
1)
1.5 K
Operational error limit for
thermocouple Type C
(across complete tempera-
ture range, in relation to in-
put range)
1)
7K
Basic error limit for 80 mV
(operational error limit at
25_C, related to the input
range)
0.05 %
Basic error limit for thermo-
couples (operational error
limit at 25_C,relatedtothe
input range)
1)
1K
Basic error limit for thermo-
couple Type C (operational
error limit at 25_C, related
to the input range)
1)
5K
Temperature error (in rela-
tion to input range)
0.005 %/K
Linearity error (relative to
the input range)
0.01 %
Repetition accuracy
(in transient state at 25_C,
relative to input range)
0.05 %
Total errors limits when us-
ing internal compensation
• Operational error limit
(over complete
temperature range in
static thermal state,
ambient temperature
fluctuation
<0.3K/min)
2)
2.5 K
• Basic error limit
(operational error limit at
25 _C in static thermal
state, ambient
temperature fluctuation
<0.3K/min)
3)
1.5 K