2.1.7 PIN Code
The PROTECT-PSC Sicherheits-Kleinsteuerung has a PIN code designed to pro-
tect against non-authorized active access (configuration setting, PIN code chang-
ing, write of the user program to CPU module).
In the following cases, the PIN code setting is required.
• When writing the user program to CPU module in Mode 3 (see chapter 5).
• When changing to Mode 3 after CPU initialization.
2.1.8 Electrical connections
The PROTECT-PSC Sicherheits-Kleinsteuerung must be connected to an
electrical power supply.
CAUTION: Electrical voltage
An electrician must connect the system to the mains.
The power supply (24 VDC) for the PROTECT-PSC Sicherheits-Kleinsteuerung
and all connected electrically linked to the PROTECT-PSC must comply to IEC
61000-6-2 and meet one of the following demands:
• Safety mains transformer to IEC 61558/VDE 0570 Part 2-6: “Special
requirements on safety transformers for general applications (IEC 61558-2-
6:1997)“.
• Switch mode power supply to IEC 60950-1 :"Information technology equip-
ment - Safety - Part 1" and to IEC 50178 : ""Electronic Equipment for Use in
Power Installations". Furthermore the power supply unit must be suitable for
supplying its SELV circuits in accordance with IEC 60950-1.
The mains must be appropriately fused!
The information contained in chapters 3 and 4 must be taken into consideration for
the operation of the PROTECT-PSC system.
The PROTECT-PSC system satisfies the pertinent provisions of the EMC Directive.
2.1.9 Shock-hazard protection
The PROTECT-PSC system is intended for use in control circuits to IEC 60204 for
a rated voltage of 24 VDC. The appropriate requirements placed on shock-hazard
protection must be satisfied for the applications.
For reasons of shock-hazard protection all connections must have the appropriate
mating connectors.
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