Electrical Connection - Siemens SIMATIC FS400 Anleitung

7

Electrical connection

The electrical connection must be performed by experienced personnel.
Knowledge of all safety notes contained in these Instruction Manual is part of this
competence.
The external supply voltage of 24 V DC ± 20% must guarantee safe isolation from
the mains voltage in accordance with IEC 60742 and be able to bridge a power
outage period of at least 20ms for the devices with transistor outputs. Transmitter
and receiver must be fused against overcurrent (see Chapter 7 and Chapter 12).
Basically both safety related switching outputs OSSD1 and OSSD2 must be looped
into the work circuit of the machine.
The weak beam signal output may not be used for switching safety-relevant
signals.
The start/restart button for unlocking the restart interlock must be mounted in such
a way that it cannot be reached from the danger area and the entire danger area is
fully visible from its installation position.
It is vital during the electrical installation that the power of the machine or system to
be protected is switched off and locked, so that the dangerous movements cannot
be started unintentionally.
159