8-52
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
Technical Specifications
Address ID for ET 200U
S
DP Siemens
S
DP Standard
4AI or 015
2AI or 013
1AI or 012
4AI or 083
2AI or 081
1AI or 080
Input ranges (rated values)
"
4 to 20 mA
Number of inputs
1, 2 or 4
(selectable)
Galvanic isolation
yes (inputs to ground–
ing point; not between
inputs)
Input resistance
w
31.25
Connection method of sensors
two–wire connection
for 2–/4–wire trans–
ducers
Digital representation of input
signal
12 bits + sign
(2048 units = rated
value)
Measured value representation two’s complement
(left–justified)
Measuring principle
integrating
Conversion principle
voltage time conver-
sion (dual slope)
Integration time
(adjustable for optimum noise
suppression)
20 ms at 50 Hz
16.6 ms at 60 Hz
Encoding time per input
S
for 2048 units
S
for 4095 units
max. 60 ms at 50 Hz
max. 50 ms at 60 Hz
max. 80 ms at 50 Hz
max. 66.6 ms at 60 Hz
Permissible voltage difference
S
between inputs
S
between inputs and central
ground point
max.
"
1 V
max. 75 V DC /
60 V AC
Permissible input current
(destruction limit)
max. 80 mA
Fault indication for
S
range exceeded
S
sensor wire break
S
general indication of wire
break
yes
(more than 4095 units)
no
no
Noise suppression for f = nx
(50 / 60 Hz
"
1 %);
n = 1, 2, ...
S
common–mode rejection
(V
pp
= 1 V)
S
series–mode rejection
S
(peak value of noise < ra-
ted value of input range)
min. 86 dB
min. 40 dB
Basic error limits
(operational error limit at
25
_
C, referred to input ranges
of module)
"
0.15 %
Operational error limits
(0 to 60
_
C, referred to input
ranges of module)
"
0.4 %
Single errors
S
linearity
S
tolerance
S
polarity reversal
"
0.05 %
"
0.05 %
"
0.05 %
Temperature error
S
final value
S
zero point
"
0.01 %/K
"
0.002 %/K
Length of cable
S
shielded
max. 200 m (660 ft.)
Supply voltage L+ for 2–wire
transducers
S
rated value
S
ripple V
pp
S
permissible range
24 V DC
3.6 V
20 to 30 V
Connection of compensating
box
not possible
Rated isolation voltage
(+9 V to )
S
isolation group
S
tested with
12 V AC
1
B
500 V AC
Rated isolation voltage
(inputs to +9 V)
S
isolation group
S
tested with
60 V AC
1
B
500 V AC
Current consumption
S
from +9 V (CPU)
S
from L+
typ. 70 mA
typ. 80 mA
Power loss of the module
S
for 2–wire transducers
S
for 4–wire transducers
typ. 1.0 W
typ. 0.7 W
Weight
approx. 230 g (8 oz.)
Module Spectrum