Siemens SIMATIC S7-300 Module data Equipment Manual

Configuration and operation
6.1 Security recommendations
CP 343-1 Lean
Equipment Manual, 01/2023, C79000−G8976−C198−09
45
• Default of the port
– Open
The port is open at the start of the configuration.
– Closed
The port is closed at the start of the configuration.
• Port status
– Open
The port is always open and cannot be closed.
– Open after configuration
The port is open if it has been configured.
– Open (login, when configured)
As default the port is open. After configuring the port, the communications partner
needs to log in.
– Open with block call
The port is only opened when a suitable program block is called.
• Authentication
Specifies whether or not the protocol authenticates the communications partner during
access.
Protocol /
function
Port number
(protocol)
Default of the
port
Port status Authentication
S7 and online
connections
102 (TCP)
Open
Open after configuration
No
HTTP
80 (TCP)
Closed
Open after configuration
No
SNMP
161 (UDP)
Open
Open after configuration
Yes (with SNMPv3)
Ports of communication partners and routers
Make sure that you enable the required client ports in the corresponding firewall on the
communications partners and in intermediary routers.
These can be:
• NTP / 123 (UDP)
• DNS / 53 (UDP)
• DHCP / 67, 68 (UDP)

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)