Siemens SIMATIC S7-1500 System Manual page 19

Product overview
2.2 Components
Components
CPU
I/O module
U connector
Front connectors
18
The CPU executes the user program and uses the integrated system
power supply to supply the electronics of the modules via the
backplane bus.
Further features and functions of the CPU:
Communication via Ethernet
•
Communication via PROFIBUS / PROFINET
•
HMI communication
•
Integrated web server
•
Integrated technology
•
Integrated system diagnostics
•
Integrated Industrial Security functions
•
Safety mode (CPU 1516F-3 PN/DP and CPU 1518F-4 PN/DP)
•
The I/O modules form the interface between the controller and the
process. The controller detects the current process state via the
connected sensors and actuators, and triggers the corresponding
reactions. I/O modules are classified into the following types of
modules:
Digital input (DI)
•
Digital output (DQ)
•
Digital input/Digital output (DIQ)
•
Analog input (AI)
•
Analog output (AQ)
•
Technology module (TM)
•
Communication module (CM)
•
Communication processor (CP)
•
A U connector is included in the scope of delivery for each I/O
module.
The modules of the S7-1500 automation system are connected using
the U connector. The U connector provides the mechanical and
electrical connection between the modules.
The U connector is included in the scope of delivery of all modules
(exception: CPU) and may be ordered as a spare part (Page 212).
The purpose of the front connectors is to wire the I/O modules.
The front connectors for technology and analog modules must be
supplemented with a shielding bracket, power supply element, and
shielding clamp. These components are included in the scope of
delivery of the technology and analog modules, and may be ordered
as accessories (Page 212).
The front connectors are available for 35 mm modules with screw
terminals and push-in terminals and for 25 mm modules with push-in
terminals.
Four potential bridges and one cable tie are included in the scope of
delivery of the front connectors for 35 mm modules. The front
connectors for 25 mm modules have no potential bridges.
Function Diagram
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB