Siemens SIMATIC ET 200C Manual page 229

Inputs (Continued)
Measuring principle
Integration/conversion
time/resolution (per channel)
parameterizable
Integration time in ms
Basic conversion time incl.
integration time in ms
Additional conversion
time for resistance-
measurement in ms
or
Additional conversion
time for wire-breakage
monitoring in ms
or
Additional conversion time
for resistance
measurement and wire-
breakage monitoring in ms
Resolution in bits + DT
(incl. overload range)
Interference voltage
suppression for interference
frequency f1 in Hz
Permissible potential
differential
Input to input
Inputs to M (U )
A CM
M to PE or M
A
Error message for
Range overshoot
Wire break on sensor line
Interference voltage suppression
for f = n (f1 1 %), (f1 = interference frequency)
Common-mode
interference (U 2.5 V)
pp
Series-mode interference
(peak interference
< nominal value of input
range)
Crosstalk between inputs
at 50 Hz
at 60 Hz
ET 200C Distributed I/O Station
EWA 4NEB 812 6119-02b
Inputs (Continued)
integrating Operational limit (for entire
voltage-frequency temperature range, referenced
conversion to input range)
80 mV
from 250 to 1000 mV
yes
Thermocouples
2
2.5 16 / 20 100
3
Resistance
5 19 22 102
Basic error (operational limit
at 25 C, referenced to input
1 1 1 1
range)
80 mV
from 250 to 1000 mV
10 10 10 10
Thermocouples
Resistance
Temperature error (referenced
16 16 16 16
to input range)
Linearity error (referenced to
input range)
9 12 12 14
Repeat accuracy (in steady
state at 25 C, referenced to
input range)
400 60 50 10
Cable length
shielded
max. 1 V
max. 1 V
max. 75 V DC/60 V AC
yes
yes, for Pt 100,
80 mV, thermocouples
types N, K, T, U, J, L, E
(parameterizable with
COM ET 200)
> 70 dB
> 40 dB
50 dB
50 dB
Analog Modules
1 %
0.6 %
10 K
5 K
0.6 %
0.4 %
7 K
3 K
0.005 %/K
0.05 %
0.05 %
max. 30 m
12-3