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Section 4 Operation S800L I/O Module LED

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S800L I/O Module LED

Figure 15 shows examples of front panels for different types of I/O modules. On the

front of each I/O module there is one LED indicating the module status. See the

tables below for information on the meaning and indications for these modules.

For modules with special LED indications see respectively module in Appendix A,

IndustrialIT System 800xA AC 800M Controller - Data Sheet.

The LED shall indicate:

• Red when the I/O module detect a fatal error or before first access after power

up.

• Green when the I/O module is operational.

Each digital channel has one LED indicating current state (on/off).

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Siemens EF 837 Series Spezifikationen Seite 49