Siemens Welding System ST PCS 7 User Manual

ET 200S distributed I/O

Siemens ST PCS 7 · November 2007

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The ET 200S is a bit-modular distributed I/O system in IP 20 de-

gree of protection and is approved for operation in Ex zone 2 

or 22 (except for operation with motor starters). It is designed 

with independent wiring that supports the hot swapping of I/O 

modules (with fire certificate).
The range of I/Os that can be used with SIMATIC PCS 7 includes 

power modules for electronics modules and motor starters, ana-

log and digital signal modules, and motor starters up to 7.5 kW. 
The implementation of safety engineering applications is sup-

ported by:
• Safety-related F-components which are integrated in the SI-

MATIC Safety Integrated System, e.g. terminal, power and 

electronics modules as well as motor starters

• SIGUARD safety engineering for motor starter applications 

with conventional safety logic in plants of safety categories 

2 to 4 (EN 954-1)

In addition to the selected modules, all other current ET 200S 

electronics modules can be used, but with limited functionality.

Use of components from the SIPLUS extreme range in extended 

temperature ranges and under medial loading on request.

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Main components of the ET 200S distributed I/O system:
• Terminal modules enable the electrical and mechanical con-

nection of the I/O modules and carry the terminals for the pro-

cess wiring: 

- TM-P terminal modules for power modules

- TM-E terminal modules for electronics modules

- TM-DS/TM-RS terminal modules for motor starters and 

TM-xB expansion modules

• IM 151 interface module for connecting the PROFIBUS DP to 

the ET 200S station. The terminal module is included in the 

scope of delivery.

• Power modules for PM-E electronics modules and PM-D mo-

tor starters 

- Individual grouping of load and sensor supply voltages and 

their monitoring, as well as 

for the safe shutting down of digital output modules

- Supplying and monitoring the auxiliary voltages for motor 

starters, as well as for the shutting down of a complete group 

of motor starters

• Electronics modules for process data exchange 

- Digital electronics modules for connecting digital sensors 

and actuators

- Analog electronics modules for connecting analog sensors 

and actuators

• Motor starter modules for switching and protecting any 

three-phase loads

• Accessories

- Reserve module for reserving a slot for any electronics mod-

ule

- Label sheets for printing ID labels on a laser printer 

- Shield connection: shield connecting element, shield termi-

nal, ground terminal, copper voltage bus 3 x 10 mm; 

components for the low-impedance connection of cable 

shielding at low cost of installation

© Siemens AG 2007