Analog Electronic Modules
12-77
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Analog Value Formation
Measurement principle Momentary value
encryption
Cycle time/resolution:
•
Conversion time in ms
(per channel)
0.1
•
Cycletimeinms(per
module)
1
•
Resolution (incl.
overshoot range)
4to20mA/13bits
0to20mA/13bits
20 mA/13 bits +
sign
Interference Suppression, Error Limits
Crosstalk between inputs >50dB
Operational error limits
(across complete
temperature range, in
relation to input range)
0.3 %
Basic error limit (operational
error limit
at 25 _C,relatedtothe
input range)
0.2 %
Temperature error (in
relation to input range)
0.01 %/K
Linearity error (relative to
the input range)
0.01 %
Repetition accuracy
(in transient state at 25 _C,
relative to input range)
0.05 %
Sensor Power Supply Outputs
Number of outputs
Output voltage
•
Loaded
Output current
•
Rated v alue
•
Permitted range
Short-circuit protection
2
L+ (--2.5 V)
90 mA
(both channels)
0mAto90mA
Yes, electronic
Data for selection of the sensor
Input range (rated
value)/input resistance
•
Current 4to20mA/50Ω
0to20mA/50Ω
20 mA/50 Ω
Connection of signal
generators
•
for current measuring as
2-wire measuring
transducer
possible
Load of the 2-wire
transducer
max. 670Ω
Permitted current at current
input (destruction limit)
60 mA
Smoothing of measured
values
Yes, configurable in
4 stages by digital
filtering
Level
No
weak
medium
strong
Time constant
1 x cycle time
64 x cycle time
128 x cycle time
512 x cycle time
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
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