Siemens ET 200S Manual page 473

Analog Value Generation
Measuring principle
Integration time/conversion
time/resolution per channel:
S
Integration time
parameterizable
S
Interference frequency
suppression in Hz
S
Integration time in
milliseconds
S
Basic conversion time
including Integration
time in milliseconds
S
Additional conversion
time for wire break
check diagnosis in ms
S
Cycle time in ms
S
Resolution (including
overrange)
Suppression of Interference, Limits of Error
Interference voltage sup-
pression for f = n x
(f1"1%), (f1 = interference
frequency)
S
Common-mode
interference (U )
pp
S
Series-mode
interference
(peak interference
value < rated value of
input range)
Crosstalk between the in-
puts
Operational limit (in the en-
tire temperature range, with
reference to the input
1
range)
Basic error limit (operational
limit at 25_C with reference
1
to input range)
Temperature error (with re-
ference to the input range)
Linearity error (with refe-
rence to the input range)
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Repeatability
(in steady state at 25_C
Integrative
with reference to input
range)
Yes
Input range (rated
value)/input resistance
60 50
S
S
16.7 20
Permitted input voltage
55 65
(destruction limit)
Connection of the sensors
S
20 20
Characteristic curve lineari-
zation
Number of active
channels per

module
Temperature compensation
conversion time
S
15 bits plus sign
S
S
Min. 90 dB
Min. 70 dB
Smoothing of the measured
values
Min. –50 dB
"0.6%
"0.4%
1
type B: as of 200 _C,
"0.005%/K type T: as of –230 _C
"0.01%
Analog Electronic Modules
Data for Selecting a Sensor
Voltage
Thermocouple
For measuring voltage
Internal temperature
compensation
External temperature
compensation by
looping a compensating
box into the measuring
circuit
External compensation
by means of
temperature value
obtained at an analog
module of the same
ET 200S station
Step
None
Weak
Medium
Strong
For type N: as of –150 _C,
"0.05%
"80 mV/min. 1 MΩ
Type E, N, J, K, L, S,
R, B, T/min. 1 MΩ
"10 V, continuous
Possible
Yes, parameteriza-
ble for type E, N, J,
K, L, S, R, B, T to
IEC 584
Not possible
Possible, one
external
compensating box
per
channel
Yes
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
12-117