Siemens SIMATIC S7-300 Module data Hardware And Installation Manual

Wiring
S7-300 Programmable Controller Hardware and Installation
6-8 A5E00105492-01
6.5 Wiring front connectors
Introduction
The front connector is used to connect the sensors and actuators of your system to
the S7-300 PLC. Wire the sensors and actuators to this front connector and then
plug it into the module.
Front connector versions
Front connectors come in 20-pin and 40-pin versions, each with screw contacts or
spring terminals. 40-pin front connectors are required for CPUs 31xC and 32-
channel signal modules.
You must use the following front connectors, depending on the module:
Table 6-5 Assigning front connectors to modules
Module Front connectors with
screw terminals; Order
No.:
Front connectors with
spring terminals; Order
No.:
Signal modules
(not 32-channel),
Function modules,
Communication module
CP 342-2
CPU 312 IFM
6ES7 392-1AJ00-0AA0 6ES7 392-1BJ00-0AA0
Signal modules
(32-channel)
CPUs 314 IFM and 31xC
6ES7 392-1AM00-0AA0 6ES7 392-1BM01-0AA0
Termination with spring terminals
To terminate a conductor in a front connector with spring terminals, simply insert
the screwdriver vertically into the opening with the red opening mechanism, insert
the wire into the terminal and remove the screwdriver.
Tip:
There is a separate opening for test probes up to 2 mm in diameter to the left of the
opening for the screwdriver.
Prerequisite
The modules (SM, FM, CP 342-2) are mounted on the profile rail.

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)