Siemens SIMATIC S7-300 Module data Hardware And Installation Manual

Wiring
S7-300 Programmable Controller Hardware and Installation
6-10 A5E00105492-01
Wiring the front connector
Table 6-6 Wiring front connectors
Step 20-pin front connector 40-pin front connector
1. Thread the cable strain relief into the front
connector.
–
Do you want to exit the cables at the bottom of the module?
If yes:
Starting at terminal 20, work your way down
to terminal 1.
Starting at terminal 40 or 20, wire the connector,
working in alternating passes from terminals 39,
19, 38, 18 etc.until you have reached
terminals 21 and 1.
2.
If not:
Starting at terminal 1, work your way up to
terminal 20.
Starting at terminal 1 or 21, wire the connector,
working in alternating passes from terminals 2,
22, 3, 23 etc.until you have reached
terminals 20 and 40.
3. Front connectors with screw terminals:
Screw-tighten unused terminals also.
4. – Attach the cable strain-relief assembly around
the cable and the front connector.
5. Pull the cable strain-relief assembly tight. Push in the strain relief retainer to the left to improve
utilization of the available cable space.
–
1
2
0.5 Nm to
0.8 Nm
1
2
4
3
0.4 Nm to
0.7 Nm

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)