Specifications

S7-200 Programmable Controller System Manual
422
Definitions of the Analog Specifications
- Accuracy: deviation from the expected value on a given point
- Resolution: the effect of an LSB change reflected on the output.
Table A-23 EM 231 and EM 235 Specifications
Full Scale In
p
ut
Repeatability
1
Mean (average) Accuracy
1,2,3,4
F
u
l
l
S
c
a
l
e
I
n
p
u
t
Range
% of Full Scale Counts % of Full Scale Counts
EM 231 Specifications
0to5V
0to20mA
± 24 ± 0.1%
0to10V
± 0.075%
2
4
0
.
1
%
± 32
± 2.5 V
0
.
0
7
5
%
±
4
8
±
0
0
5
%
3
2
± 5V
± 48 ± 0.05%
EM 235 Specifications
0to50mV ± 0.25% ± 80
0to100mV ± 0.2% ± 64
0to500mV
0to1V
± 0.075% ± 24
0to5V
0
0
5
%
± 0.05% ± 16
0to20mA
0
0
5
%
6
0to10V
± 25 mV ± 0.25% ± 160
± 50 mV ± 0.2% ± 128
± 100 mV ± 0.1% ± 64
± 250 mV
± 500 mV
± 0.075% ± 48
± 1V
±
0
.
0
7
5
%
±
4
8
±
0
0
5
%
±
3
2
± 2.5 V
± 0.05% ± 32
± 5V
± 10 V
1
Measurements made after the selected input range has been calibrated.
2
The offset error in the s ignal near zero analog input i s not corrected, and is not included in the accuracy specifications.
3
There is a channel-to-channel carryover conversi on error, due to the fi nite settl ing time of the analog multiplexer. The maxi m um carryover
error is 0.1% of the difference between channel s.
4
Mean accuracy incl udes effects of non-linearity and drift from 0 to 55 degrees C.