REXROTH IndraControl L25 CML...3N Series, Project Planning Manual

Page: 51 / 72

Danger of personal injury and material dam‐
age!
DANGER
Any dangerous states of the system which might cause personal injury or ma‐
terial damage must be prevented!
The rules and regulations for setting up EMERGENCY STOP equipment ac‐
cording to EN 60 204-1 must be adhered to!
Any automatic restart of machines after power return, e. g. after an EMER‐
GENCY STOP, must be excluded!
Protection for direct and indirect contact must be ensured by the measures
prescribed (connection to protective conductor, isolation, etc.).
8.3.2 External Power Supply Unit
All components of the IndraControl L25 are supplied with 24 V voltage supplies.
The power supply unit must be safety-separated according to DIN EN 50 178,
section 5.2.18.1. Transformers must be designed with safety separation ac‐
cording to DIN EN 60 742.
If these requirements are complied with, the 24 V supply voltage is rated as
safety-separated extra-low voltage according to DIN EN 50 178, section
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 simple full-bridge rectification is sufficient.
The ripple voltage content must not exceed 5 %.
All 24 V voltage supply lines have to
●
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 60 204-1: 1997, section
14.1.3).
Any peripherals, e.g. digital sensors or actuators, which are connected to the
interfaces of the IndraControl L25, have to comply also with the criteria of safe‐
ty-separated circuits.
8.3.3 24 V Voltage Supply
Setup without Electrical Isolation
The most easiest connection method is the establishment without an electrical
isolation between the internal logic and the peripheral supply.
In this case, a power supply unit is appropriate to supply the IndraCon‐
trol L25. It is not permitted to use an autotransformer to ensure compliance with
overvoltage category II.
DOK-CONTRL-IC*L25*****-PR03-EN-P
Rexroth IndraControl L25 Bosch Rexroth AG 49/69
Installation and Maintenance