Siemens SIMATIC S7-300 Module data Reference Manual

Special Signal modules
5-2
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
5.1 Module Overview
Introduction
The following table summarizes the most important features of the signal modules
described in this chapter. This overview is intended to make it easy to choose the
suitable module for your task.
Table 5-1 Special signal modules: Characteristics at a Glance
Module
Char-
acter-
istics
Simulator module
SM 374; IN/OUT 16
Dummy module DM 370 Position decoder
module
SM 338; POS-INPUT
Number of
inputs/outputs
• max. 16 inputs or
outputs
1 slot reserved for 1
non-parameterized
module
• 3 inputs for connection
of absolute value
encoders (SSI)
• 2 digital inputs for
freezing the encoder
values
Suitable for... Simulation of:
• 16 inputs or
• 16 outputs or
• 8 in– and outputs
Placeholder for:
• Interface Modules
• Non-parameterized
signal modules
• Modules which occupy
2 slots
Position decoding with up
to 3 absolute value
encoders (SSI)
Encoder types: Absolute
value encoder (SSI)
with 13-bit, 21-bit or 25-bit
message lengths
Data format: Gray code or
binary code
Supports clocked
operation
No No Yes
Programmable
diagnostics
No No No
Diagnostic
interrupt
No No Adjustable
Special Features Function adjustable with
screwdriver
When replacing the
DM 370 with another
module, the mechanical
assembly and address
assignment/address
location of the entire
assembly remain
unchanged
Absolute value encoders
with a monoflop time
greater than 64s cannot
be used on the SM 338

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)