Siemens SIMATIC S7-300 Module data Reference Manual

Analog Modules
4-189
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Module View and Block Diagram of the SM 334; AI 4/AO 2 x 8/8 bits
Select the measuring method of the input channels and the output type of the
output channels via the wiring.
Internal
supply
Backplane
bus
interface
L +
24V
DAC
M
M
MV
0 +
M
0
*
MV
1 +
MI
0 +
M
1
*
MI
1 +
MV
2 +
M
2
*
MI
2 +
MV
3 +
M
3
*
MI
3 +
CH0
CH1
CH2
CH3
QV
0
M
ANA
QI
0
QV
1
M
ANA
QI
1
CH0
CH1
ADC
Voltage Current outputs
Voltage Current measurement
M
ANA
M
ANA
V
A
V
A
A
V
A
V
A
V
V
A
Figure 4-55 Module View and Block Diagram of the Analog Input/Output Module SM 334;
AI 4/AO 2 x 8/8 bits
Note
Note when connecting the SM 334 that:
• the analog chassis ground M
ANA
(terminal 15 or 18) is connected to the
chassis ground M of the CPU and/or the interface module (IM). Use a wire
with a minimum cross-section of 1 mm
2
for this.
If there is no ground connection between M
ANA
and M, the module switches
off. Inputs are read with 7FFF
H
; outputs return a value of 0. If the module is run
without a ground connection for some time, it may be destroyed.
• The supply voltage for the CPU and/or the interface module (IM) must not
be connected with reversed polarity. Reverse polarity causes the
destruction of the module because M
ANA
is subjected to an unauthorized high
potential (+24 V).

Siemens SIMATIC S7-300 Module data Specifications

General

Series	S7-300
Manufacturer	Siemens
Protection Class	IP20
System	SIMATIC S7-300
Digital Inputs	Varies by module
Digital Outputs	Varies by module
Analog Inputs	Varies by module
Analog Outputs	Varies by module
Central Processing Unit	Varies by CPU model
Supply Voltage	24V DC or 120/230V AC
CPU Type	Varies (e.g., CPU 312, CPU 315, etc.)
Memory	Varies by CPU model
Communication Interfaces	MPI, PROFIBUS
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Relative Humidity	10% to 95% (non-condensing)