Analog modules
9.2 SM 336; AI 6 x 13 Bit
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
189
Improving current measuring precision at channels 0 through 3 of the analog input module
It is advisable to interconnect unused voltage inputs with the corresponding current input
when using channels 0 to 3 of SM 336; AI 6 x 13Bit for current measurements. See the
figure below. This measure improves precision by approx. 0.2%.
/
0
'08
3
9
6
0
9
09
Q
0,
Q
0
$1$
60
$,[%LW
UHFRPPHQGHG
6HQVRU
1 WR
Figure 9-7
Improving current measuring precision at channels 0 through 3 using 2 DMU
9
0
09
0,
0
/
0
'08
3
6
Q
Q
Q
$1$
60
$,[%LW
UHFRPPHQGHG
UHFRPPHQGHG
Q WR
Figure 9-8
Improving current measuring precision at channels 0 through 3 using 4 DMU