Siemens SIMATIC ET 200SP System Manual

Application planning
4.5 Forming potential groups
Distributed I/O system
54 System Manual, 09/2019, A5E03576849-AJ
4.5.2 Forming potential groups with BaseUnit type B1
Introduction
The AC I/O modules of the ET 200SP are required to connect sensors/actuators with
alternating voltage 24 to 230 V AC.
Requirements
BaseUnits BU20-P12+A0+4B (BU type B1) and
● DI 4x120..230VAC ST digital input module
● DQ 4x24..230VAC/2A ST digital output module
Operating principle
Connect the needed module-dependent alternating voltage for the AC I/O modules directly to
the BaseUnits BU20-P12+A0+4B (terminals 1L, 2L/1N, 2N). Insert the AC I/O modules on
the BaseUnits.
Note
Placing the BaseUnits for AC I/O modules
If you insert an AC I/O module as the first I/O module, then a BaseUnit BU20
-P12+A0+4B
can als
o be the first BaseUnit to the right of the CPU/interface module in the ET 200SP
configuration.
The requirement i
s that you use a CPU as of V3.0 or IM 155-6 (as of V3.0).
•
The BaseUnits BU20-P12+A0+4B do not monitor the connected alternating voltage.
Please note the information on limiting the overvoltage and power rating in the AC I/O
module manuals.
•
Pay attention to the type of the BaseUnits during configuration.

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