Siemens SIMATIC S7-300 Module data Reference Manual

Analog Modules
4-105
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Table 4-61 Assignment of the channels of the SM 331; AI 8 x 14 bits High Speed to
channel groups
Channels ... ... form one Channel Group each
Channel 0
Channel group 0
Channel 1
Channel group 0
Channel 2
Channel group 1
Channel 3
Channel group 1
Channel 4
Channel group 2
Channel 5
Channel group 2
Channel 6
Channel group 3
Channel 7
Channel group 3
Special characteristic of channel groups for hardware interrupts
You can set hardware interrupts in STEP 7 for the channel groups 0 and 1. Note,
however, that a hardware interrupt is set only for the first channel in the channel
group in each case – in other words, for channel 0 or channel 2
Diagnostics
You will find the diagnostic messages that are grouped under the “group diagnosis”
parameter in Table 4-47 in the reference manual.
4.20.3 Measuring Methods and Measuring Ranges of the SM 331;
AI 8 x 14 bits High Speed
Measuring Methods
You can set the following measuring methods for the input channels:
• Voltage measurement
• Current measurement
You perform the setting by means of the measuring range modules on the module
and with the “measuring method” parameter in STEP 7.
Unused Channels
You must short-circuit unused channels and connect them to MANA. In this way,
you obtain an optimum interference immunity for the analog input module. Set the
“measuring method” parameter for unused channels to “disabled”.

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)