Siemens ST PCS 7 User Manual

Dezentrale Peripherie ET 200pro

Siemens ST PCS 7 · November 2007

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In combination with the safety-related automation systems of the 

SIMATIC PCS 7 process control system, the safety-related elec-

tronics modules of SIMATIC ET 200pro can be used to imple-

ment safety applications. The safety-related digital inputs record 

the signal statuses from safety-related sensors, and generate 

corresponding safety telegrams for the automation system. De-

pending on the safety telegrams of the automation system, the 

safety-related digital outputs trigger safe shut-down procedures. 

They are also responsible for monitoring short-circuits and 

cross-circuits up to the actuator. The safe communication with 

the automation systems is carried out over PROFIBUS with 

PROFIsafe.
All modules are certified up to SIL 3 (IEC 61508) and Cat. 4 

(EN954-1).
The following modules are available:

• 16 inputs (SIL2/Cat.3) or 8 inputs (SIL3/Cat.3 or Cat.4) 
• Suitable for standard switches and 3/4-wire proximity switches 

(BEROs)

• Rated input voltage 24 V DC 
• 4 short-circuit-proof sensor supplies for 4 inputs each 
• External sensor power supply possible 
• Group fault display (SF; red LED) 
• Fault display for each sensor power supply (Vs1F to Vs4F) is 

output on the VsF LED and the associated channels 

• Status and fault displays per input (dual-color green/red LED) 
• Identification data 
• Parameterizable diagnostics 
• Can only be operated in safety mode 

• Inputs 

- 8 inputs (SIL 2/Cat. 3) or 4 inputs (SIL 3/Cat. 3 or Cat. 4) 

- Suitable for standard switches and 3/4-wire proximity 

switches (BEROs) 

- Rated input voltage 24 V DC

- 2 short-circuit-proof sensor supplies for 4 inputs each 

- External sensor power supply possible 

• Outputs 

- 4 outputs, current sourcing/sinking 

- Output current 2 A 

- Rated load voltage 24 V DC 

- Suitable for solenoid valves, DC contactors and indicator 

lights

• Group fault display (SF; red LED) 
• Fault display for each sensor power supply (Vs1F to Vs2F) is 

output on the VsF LED and the associated channels 

• Status and fault displays per input/output (dual-color 

green/red LED) 

• Identification data 
• Parameterizable diagnostics 
• Achievable safety class SIL 3 
• Can only be operated in safety mode 

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For detailed technical specifications of the safety-related elec-

tronics modules, see: 
• Catalog IK PI
• Mall/CA 01 under "Distributed I/Os / ET 200pro"

© Siemens AG 2007