Overview; Installation - Pilz PSS Series Operating Manual

PSS1 PS 24

Overview

The PS Power Supply provides the internal voltage required to operate the
module rack, and the 12 V DC required to program the user memory. The
unit supply is 24 V DC. The built-in battery is used to buffer the real-time
clock and the standard section memory components and is monitored by
the CPU.
There is a switch to turn the supply voltage on and off, making it easier to
install the systems in the Series PSS 3100. The supply must be switched
off when changing cards.
The module PSS1 PS 24 is designed for use on the Series PSS 3100
Module Rack.

Installation

CAUTION!
Electrostatic discharge can damage the components on the module.
Ensure against discharge before touching the module, e.g. by touching an
earthed, conductive surface or by wearing an earthed armband.
• The PS 24 module should be installed in the first slot of the module rack,
as described in the "Series PSS 3000/PSS 3100 Installation Guidelines".
• Connect up the supply:
24 V DC as described on the front of the power supply.
WARNING!
Safe electrical isolation must be ensured for the external 24 V supply.
Failure to do so could result in electric shock. Power supplies must
conform to DIN VDE 0551 / EN 60 742 and DIN VDE 0160.
• Turn the "Power" switch to "ON".
When correctly installed, the "POWER" LED will illuminate.
INFORMATION
There must be a break of at least 5 s between switching off the supply
voltage and switching on again.
2 Operating Manual