Siemens SIMATIC S7-300 Module data Reference Manual

Analog Modules
4-50
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
4.9 Connecting Voltage Sensors
Note
The necessary connecting cables, which result from the potential connection of the
analog input module and the sensors, are not drawn in the figures shown below.
In other words, you must continue to take note of and implement Section 4.8 with
its generally valid information for connecting sensors.
Abbreviations and mnemonics used in the figure below
The abbreviations and mnemonics used in the figure below have the following
meanings:
M +: Measuring lead (positive)
M–: Measuring lead (negative)
M
ANA
: Reference potential of the analog measuring circuit
M : Ground terminal
L +: Terminal for 24 VDC supply voltage
U +: Measuring lead for voltage input
Connection of voltage sensors
M+
M
L+
M–
M
ANA
M+
M–
ADC
+
–
U
+
–
U
Backplane
bus
Logic
Figure 4-11 Connecting Voltage Sensors to an Isolated AI

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)