Analog Electronic Modules
12-101
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Analog Value Generation
Measuring principle Instantaneous value
encoding
Cycle time/Resolution:
Conversion time in ms
(per channel)
0.1
Cycle time in ms (per
module)
1
Resolution (including
overrange)
4 to 20 mA/13 bit
0 to 20 mA/13 bit
"20 mA/13 bits +
sign
Suppression of Interference, Limits of Error
Crosstalk between the in-
puts
> 50 dB
Operational limit
(entire temperature range
with reference to input
range)
"0.3%
Basic error limit (operational
limit at 25 C with reference
to input range)
"0.2%
Temperature error (with
reference to the input
range)
"0.01%/K
Linearity error (with
reference to the input
range)
"0.01%
Repeatability
(in steady state at 25 C
with reference to input
range)
"0.05%
Sensor Power Supply Outputs
Number of outputs
Output voltage
With load
Output current
Rated value
Permitted Range
Short-circuit protection
2
L+ (-2.5 V)
90 mA
(both channels)
0 mA to 90 mA
Yes, electronic
Data for Selecting a Sensor
Input range (rated
value)/input resistance
Current 4 to 20 mA/50 Ω
0 to 20 mA/50 Ω
"20 mA/50 Ω
Connection of the sensors
For current
measurement as
two-wire measuring
transducer
Possible
Load of the two-wire
measuring transducer
Max. 670Ω
Maximum input current for
current input (destruction
limit)
60 mA
Smoothing of the measured
values
Yes, parameteriza-
ble in 4 steps by
means of digital filte-
ring
Step
None
Weak
Medium
Strong
Time constant
1 x cycle time
64 x cycle time
256 x cycle time
512 x cycle time
1
Without sensor supply voltage
2
DPV1 only
3
Parameter assignment error
Violation of lower limit value
Violation of upper limit value
Open circuit (only at 4 to 20 mA)
Hardware interrupt lost
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