Siemens SIMATIC S7-300 Module data Hardware And Installation Manual

Configuring
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
4-35
The table below lists the properties of these bus cables.
Table 4-16 Properties of PROFIBUS cables
Properties Values
Impedance level approx. 135 Ω to 160 Ω (f = 3 MHz to 20 MHz)
Loop resistance ≤ 115 Ω/km
Effective capacitance 30 nF/km
Attenuation 0.9 dB/100 m (f = 200 kHz)
Permissible conductor cross-sections 0.3 mm
2
to 0.5 mm
2
Permissible cable diameter 8 mm ± 0.5 mm
Wiring bus cables
When wiring PROFIBUS cables, you must not
• twist,
• stretch
• or compress them.
When wiring indoor bus cables, also maintain the following marginal conditions
(d
A
= outer cable diameter):
Table 4-17 Marginal conditions for wiring interior bus cables
Characteristics Condition
Bending radius (one-off) ≥ 80 mm (10 x d
A
)
Bending radius (multiple times) ≥ 160 mm (20 x d
A
)
Permissible temperature range during installation –5 °C to +50 °C
Shelf and stationary operating temperature range –30 °C to +65 °C
Cross-reference
If you want to use optical waveguide cables for PROFIBUS, you can find further
information on this topic in the Manual SIMATIC NET, PROFIBUS Networks.

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)