Siemens Simatic S7-300 - Page 286

Analog modules
6.7 Analog input module SM 331; AI 8 x 12 Bit;(6ES7331-7KF02-0AB0)
S7-300 Automation System Module data
6-52 Manual, 08/2006, A5E00105505-04
Note
• "Resistance measurement" is only available at one channel per group. The "2nd" channel
of the group is used accordingly for current impression (I
C
). The "1st" channel of the
group returns the measured value. The "2nd" channel of the group has the default
overflow value "7FFF
H
."
• There is no performance resistors compensation with "2- and 3-wire connections".
Wiring: Thermocouples with external compensation
With internal compensation, there must be a bridge between Comp+ and M
ANA
.










9










7

6)
&+
&+
&+
&+
&+
&+
&+
&+
&RPS
&203


'&
/
0
0ದ
0ದ
0
0
0ದ
0$1$
0
0
0ದ
0ದ
0
0
0ದ
0ದ
0
0
0
)XQFWLRQDO
JURXQG
%DFNSODQHEXV
FRQQHFWLRQ
(OHFWULFDO
LVRODWLRQ
,QWHUQDO
VXSSO\
&XUUHQW
VRXUFH
LQW
FRPS
1RQH
0XOWL
SOH[HU
0HDVXULQJ
UDQJHPRGXOHV
$'&
H[WFRPSHQVDWLRQ
(TXLSRWHQWLDO
ERQGLQJ
Figure 6-17 Block diagram and wiring diagram