Siemens Welding System ST PCS 7 User Manual

ET 200M distributed I/O

Siemens ST PCS 7 · November 2007

11

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The following analog and digital I/O modules are suitable for use 

in hazardous plants. They separate the non-intrinsically safe 

electrical circuits of the automation system and the intrinsically 

safe electrical circuits of the process. Sensors and actuators 

suitable for placing in zone 1 or 21 and 2 or 22 hazardous areas 

as well as intrinsically safe equipment compliant with DIN 50020 

and [EEx ib] IIC can be operated on these modules.
All Ex modules come with diagnostics capability (channel and 

module diagnostics).
Ex modules identified by "redundant design possible" 

(6ES7 321-7RD00-0AB0, 6ES7 322-5SD00-0AB0, 6ES7 331-

7RD00-0AB0, 6ES7 332-5RD00-0AB0) can also be configured 

redundant when used in non-hazardous plants.

For additional Ex modules, refer to page 11/23.

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Order No.

4 NAMUR inputs in 4 channel 
groups
Redundant design possible 
(module redundancy)
• Voltage supply to sensors 8.2 V
• Individually floating channels
• Wire break and short-circuit 

monitoring (directly at the con-

tact for contacts with external 

resistor circuit)

• Diagnostics inside module 
• Front connector required: 

20-contact

4 outputs, 24 V DC / 10 mA in 
4 channel groups
Redundant design possible 
(module redundancy)
• Individually floating channels
• Wire break monitoring
• Short-circuit monitoring
• Diagnostics inside module 
• Front connector required: 

20-contact

4 outputs, 15 V DC / 20 mA in 
4 channel groups
• Individually floating channels
• Wire break monitoring
• Short-circuit monitoring
• Diagnostics inside module 
• Front connector required: 

20-contact

4 inputs, 0/4 to 20 mA in 
4 channel groups
Redundant design possible 
(module redundancy)
• Individually floating channels
• Resolution 15 bit + sign
• Connection of 2-wire or 4-wire 

transmitters possible

• Wire break monitoring
• Measurement range monitoring
• Short-circuit-proof
• Diagnostics inside module 
• Front connector required: 

20-contact

8 inputs in 4 channel groups
• Resolution 15 bit + sign
• Thermocouples type T, U, E, J, 

L, K, N, R, S, B (8 channels)

Internal compensation; external 

compensation with Pt100 

(2 channels), compensating box 

or 0/50 °C cold junction

• Resistance thermometer Pt100, 

Pt200, Ni100 (4 channels; 2-wire 

or 4-wire, 3-wire Pt100 on 

request)

• Wire break monitoring
• Diagnostics inside module 
• Front connector required: 

20-contact

:

A special front connector for the 

Ex analog input module 6ES7 

331-7SF00-0AB0 enables greater 

accuracy when taking thermo-

couple temperature measure-

ments in "internal compensation" 

mode (see page 11/12).

4 outputs, 0/4 to 20 mA in 
4 channel groups
Redundant design possible 
(module redundancy)
• Individually floating channels
• Resolution 15 bit
• For 2-wire transmitters
• Wire break monitoring
• Diagnostics inside module 
• Front connector required: 

20-contact

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Order No.

© Siemens AG 2007