Siemens SIMATIC S7-300 Module data Reference Manual

Analog Modules
4-49
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
When connecting non-isolated sensors to non-isolated modules, you can operate
the CPU only in Grounded mode.
Non-isolated
sensors
M+
M
L+
M–
M
ANA
M+
M–
Backplane
bus
M
internal
L+
M
Ground bus
CPU
ADC
U
CM
Equipotential
bonding
conductor
Logic
Figure 4-10 Connecting non-isolated sensors to a non-isolated AI
Note
You must not use non-isolated two-wire transmitters and non-isolated
resistance-type sensors with a non-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)