Siemens General Rules and Regulations for Operating the S7-400, General Basic Rules

Assembling and Installing Systems

A.1 General Rules and Regulations for Operating the S7-400

General Basic Rules

On account of the many possible applications of the S7-400, this chapter can only cover the basic rules for the electrical configuration. You must at least comply with these basic rules to ensure fault-free operation of the S7-400.

Specific Application

Observe the safety and accident prevention regulations applying to specific applications, for example, the Machine Protection Guidelines.

EMERGENCY OFF Devices

EMERGENCY OFF devices complying with IEC 60204-1 (which corresponds to VDE 0113-1) must remain effective in all operating modes of the plant or system.

Reactions of the Plant after Certain Events

The following table shows how you must respond to the reactions of a plant to certain events.

Event	Requirement
Failure of the operating or	Hazardous operating states must not occur.
supply voltage of the S7-400
Tripping of the Emergency	Hazardous operating states must not occur.
Off device
Restoration of the operating	Hazardous operating states must not occur. No
or supply voltage of the	uncontrolled or undefined restart of the system must occur.
S7-400
Restart after release of the	Hazardous operating states must not occur. No
Emergency Off device	uncontrolled or undefined restart of the system must occur.

A-2	Automation System S7-400	Hardware and Installation
		A5E00850741-01