IndraControl L40 Installation and Maintenance 8-7
DOK-CONTRL-IC*L40*****-PR02-EN-P
8.3 Electric Installation
When setting up a system in which electrical equipment, such as control
units, will be used, always comply with the regulations specified in the
following standards:
• DIN VDE 0100
• DIN EN 60 204–1
• DIN EN 50 178
DANGER
Danger of personal injury and material damage!
⇒
Any dangerous states of the system which might
cause personal injury or material damage must be
prevented!
⇒
The rules and regulations for setting up
EMERGENCY STOP equipment in accordance with
EN 60204-1 must be adhered to!
⇒
Any automatic restart of machines after power
return, e.g. after an EMERGENCY STOP, must be
excluded!
⇒
Protection for direct and indirect contact must be
ensured by the measures prescribed (connection to
protective conductor, isolation, etc.).
External Power Supply Unit
All components of the IndraControl L40 are supplied with 24-V supply
voltages.
The power supply unit must be safety-separated in accordance with DIN
EN 50178, Section 5.2.18.1. Transformers must be designed with safety
separation in accordance with DIN EN 60742.
If these requirements are complied with, the 24-V supply voltage is rated
as safety-separated extra-low voltage in accordance with DIN EN 50178,
5.2.8.1. This voltage is designed either as safety extra-low voltage (SELV)
without ground connection of the reference conductor or as protective
extra-low voltage (PELV) with ground connection of the reference
conductor.
A three-phase power supply unit with easy full-bridge rectification is
appropriate. The ripple voltage content must not exceed 5%.
All 24-V voltage supply lines must
• be laid such that they are isolated from lines carrying higher voltages,
or
• be insulated to a particularly high degree, with the insulation having to
be designed for the highest voltage present (see EN 60204-1: 1997,
Section 14.1.3).
Any peripherals, such as digital sensors/actuators, which are connected
to the interfaces of the IndraControl L40, must also comply with the
criteria of safety-separated circuit.
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