Siemens SIMATIC ET 200SP System Manual

Application planning
4.5 Forming potential groups
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
53
Operating principle
1
CPU/interface module
14
Server module
2
BaseUnit BU...D
15
Self-assembling voltage buses P1/P2
3
BaseUnit BU...B
16
AUX bus
4
Potential group 1
17
Infeed bus 500 V AC (L1, L2(N), L3, PE)
5
Potential group 2
18
Supply voltage L+
6
Potential group 3
19
Supply voltage L+ (3)
7
BaseUnit BU...B with dummy module
20
Additionally required voltage
8
BaseUnit BU30-MS2
21
Supply voltage L+ (2)
9
BaseUnit BU30-MS4
22
Protective conductor (green/yellow)
10
BaseUnit BU30-MS1
23
Supply voltage L+ (1)
11
Potential group 4
24
Supply voltage 1L+
12
BaseUnit BU30-MS4
13
Backplane bus
Figure 4-4 Placing the BaseUnits
Connecting different potentials to the power or AUX bus
Note
If you apply different potentials to the power or AUX bus within an ET
200SP station, you
need to separate the potential groups with a BaseUnit BU...D.

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