Safety Door With Two N/O Switches; Installation; General Information About Installation - Festo CPX-F8DE-P Manual

Installation

2.4.8

Safety door with two N/O switches

This application example is suitable for settings subject to vibration, e.g. close to a press or stamping
machine.
Fig. 25: 2 N/O switches on one channel pair
A robust version of the safety circuit is created with function mode 8. This safety function is enabled
only if both switches are closed within 60 seconds of each another. If a switch was not previously
opened, the channel or module is passivated. The input module reports channel error 55: "process
value".
3 Installation
3.1

General information about installation

WARNING
Electric voltage
Injury caused by electric shock, damage to machine and to system
• Use exclusively PELV electrical circuits (protective extra low voltage/PELV) for the electrical power
supply in accordance with IEC 60204-1.
• Observe the general requirements of IEC 60204-1 for PELV circuits.
• Use only voltage sources that guarantee a reliable electric separation of operating and load voltage
in accordance with IEC 60204-1.
• Always connect all power circuits for the operating and load voltage supplies U
Protection from electric shock (protection from direct and indirect contact) in accordance with
IEC 60204-1 (Electrical equipment of machines, General requirements) is guaranteed with the use
of PELV circuits.
Festo — CPX-F8DE-P — 2022-10d
, U and U .
EL/SEN VAL OUT
51