Siemens SIMATIC ET 200SP System Manual

Wiring
6.7 Wiring BaseUnits for I/O modules
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
101
6.7 Wiring BaseUnits for I/O modules
Introduction
The BaseUnits connect the ET 200SP distributed I/O system to the process. The following
versions of the BaseUnits can be used:
● BaseUnits (with light-colored terminal box) for opening a potential group: BU..D
● BaseUnits (with dark-colored terminal box) for extending the potential group: BU..B
● BaseUnits with additional AUX terminals or additional terminals: BU..+10..
● BaseUnits with integrated thermal resistor for compensation of the reference junction
temperature when connecting thermocouples: BU..T
● PotDis-BaseUnits (with light-colored terminal box) for opening a PotDis potential group:
PotDis-BU..D
● PotDis-BaseUnits (with dark-colored terminal box) for extending the potential group:
PotDis-BU..B
①
Push-in terminal
②
Spring release
③
Measuring probe (suitable probes: 1 mm diameter, length ≥ 10 mm while observing the
permitted voltage category)
④
Holder for shield connection
Figure 6-5 View of the BaseUnit
Note
The pin assignment of the BaseUnit depends on the connected I/O module. Information
on the BaseUnit
s and I/O modules can be found in the associated manuals.
Replacement of the terminal box on the BaseUnit is described in the section
Replacing
the terminal box on the BaseUnit
(Page 240).

Siemens SIMATIC ET 200SP Specifications

General

System Type	Distributed I/O System
Mounting	DIN Rail
Communication Protocol	PROFINET, PROFIBUS
IP Rating	IP20
Category	I/O Systems
Supply Voltage	24 V DC
Modularity	Yes
Hot Swapping	Yes
Storage Temperature	-40°C to +70°C
Digital Inputs	Yes
Digital Outputs	Yes
Analog Inputs	Yes
Analog Outputs	Yes
Communication Interface	PROFINET, PROFIBUS
Number of Modules	Up to 64
Relative Humidity	5 to 95% (non-condensing)
Operating Temperature	-25°C to +60°C