Siemens SIMATIC S7-300 Module data - Module View and Block Diagram of the SM 334; AI 4;AO 2 X 12 Bits

Analog Modules
4-195
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Terminal connection and block diagram of the SM334; AI 4/AO 2 x 12 bits
Internal
supply
M
L+
Current
source
24V
Multiplexer
DAC
M
ANA
M
ANA
M
ANA
M
ANA
M
V
V
Back-
plane
bus
inter-
face
M
ANA
CH0
CH1
M
2+
M
2
*
M
3 +
M
3
*
Voltage input
Voltage
outputs
M
ANA
Q
V0
I
C01+
Q
V1
M
0 +
M
0
*
M
1 +
M
1
*
I
C01
*
Resistance test
I
C23+
M
2 +
M
2
*
M
3 +
M
3
*
I
C23
*
CH0
CH1
CH3
CH2
U
U
Figure 4-56 Module View and Block Diagram of the SM 334; AI 4/AO 2 x 12 bits