Connecting Components - Siemens SIMATIC TOP connect Manual

Connecting

4.3 Connecting components

4.3 Connecting components
Introduction
Risk of electrocution
Touching live parts can result in death or serious injury.
Before you connect a module, make sure that it is disconnected from the power supply.
The procedure for connecting the front connector modules is basically the same as for the
standard front connectors. Connecting the standard front connectors is described in detail in
the manual "S7-300 CPU 31xC and CPU 31x: Installation"
support.automation.siemens.com/WW/view/en/13008499) manual.
Before connecting the front connector modules, read the following sections of the manual:
● Requirements for wiring the S7-300
● Connecting the mounting rail with a protective conductor
● Wiring the front connector
● Connect shielded wires to the shield connection element
● Plugging the front connector into the module
Abbreviations used
The meanings of the abbreviations in the figures below are as follows:
AI
BR
M
L+
Mn
ICn+/ICn-
Un+/Un-
In+/In-
COMP+/COMP-
IComp+/IComp-
UV
UCM
UISO
MANA
24
WARNING
Analog input module
Potential bridges
Connection for ground
Connection for supply voltage
Measuring input, channel n
Current output power supply, thermal resistance (RTD), channel n
Voltage input, channel n
Current input, channel n
Compensation input
Current output power supply, compensation
Feed voltage at channel for 2-wire transducer (2DMU)
Potential difference between reference points of the measuring inputs / the analog
ground MANA
Potential difference between reference points of the measuring inputs and the
central grounding point
Reference point of the analog ground
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System cabling for S7-300
Manual, 09/2018, 70327045899