Siemens SIMATIC ET 200S Manual page 483

Analog Value Formation
Measurement principle
Cycle time/resolution:
•
Conversion time in ms
(per channel)
•
Cycle time in ms (per
module)
•
Resolution (incl.
overshoot range)
Interference Suppression, Error Limits
Crosstalk between inputs
Operational error limits
(across complete
temperature range, in
relation to input range)
Basic error limit (operational
error limit
at 25 _C, related to the
input range)
Temperature error (in
relation to input range)
Linearity error (relative to
the input range)
Repetition accuracy
(in transient state at 25 _C,
relative to input range)
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Momentary value
encryption
0.1
1
4 to 20 mA/13 bits
0 to 20 mA/13 bits
20 mA/13 bits +
sign
> 50 dB
0.3 %
0.2 %
0.01 %/K
0.01 %
0.05 %
Analog Electronic Modules
Sensor Power Supply Outputs
Number of outputs
Output voltage
•
Loaded
Output current
•
Rated value
•
Permitted range
Short-circuit protection
Data for selection of the sensor
Input range (rated
value)/input resistance
•
Current
Connection of signal
generators
•
for current measuring as
2-wire measuring
transducer
Load of the 2-wire
transducer
Permitted current at current
input (destruction limit)
Smoothing of measured
values
Level
weak
medium
strong
1)
without sensor power supply
2)
DPV1 only
3)
configuration error
violation of lower limit value
violation of upper limit value
open circuit (at 4 to 20mA only)
process interrupt lost
2
L+ (--2.5 V)
90 mA
(both channels)
0 mA to 90 mA
Yes, electronic
4 to 20 mA/50 Ω
0 to 20 mA/50 Ω
20 mA/50 Ω
possible
max. 670Ω
60 mA
Yes, configurable in
4 stages by digital
filtering
Time constant
No 1 x cycle time
64 x cycle time
128 x cycle time
512 x cycle time
12-77