Siemens SIMATIC S7-300 Module data Reference Manual

Analog Modules
4-92
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
4.19.2 8-channel mode
Description of the module cycle
In 8-channel mode, the isolated analog input module SM 331; AI 8 x 16 bits
switches between the two channels in each group. As the module contains four
analog/digital converters (ADC), all four of the ADCs simultaneously convert for
channels 0, 2, 4 and 6. Once the even-numbered channels have been converted,
all the ADCs simultaneously convert for the odd-numbered channels 1, 3, 5 and 7
(see Figure 4-35).
Scan time
Start analog conversion
(simultaneous)
K0 K2 K4 K6
K1 K3 K5 K7
Start analog conversion
(simultaneous)
Figure 4-35 8-channel mode cycle

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)