Siemens SIMATIC NET PROFIBUS User Manual

15

Version 1.0 8/00

4 Setting Up

4.1 Safety notice

Only use the PROFIBUS OLM as described in this ”Description and Operating Instructions“. 
Pay particular attention to all the warnings and safety instructions.

Only operate the modules with a safety extra-low voltage in accordance with IEC 950/EN 60 950/VDE 0805 with
a maximum rating of +32 V (typically +24 V). 
The power source must comply with NEC, Class 2, regulations as stipulated by UL/CSA.

Pay attention to the electrical limit values when connecting the power supply to the signaling contacts: 
max. voltage 60 V DC, 42 V AC. 
The connected power supply must also be safety extra-low voltage in accordance with IEC 950/ EN 60 950/ 
VDE 0805 and comply with NEC, Class 2, regulations as stipulated by UL/CSA.

DANGER: Never connect the PROFIBUS OLM to the main power supply.

Only install the device in a location where the climatic and mechanical limit values given in the Technical Data
can be complied with.

WARNING: Do not look directly into the aperture of the optical transmitting diode or the optical fiber. 
The light beam which is emitted could endanger your eyesight.

The optical radiated power of the com-
ponents used in this device does not
represent a potential health hazard of any
description under normal, foreseeable
conditions, and it complies with Class 1 in
accordance with IEC 60825-1:1994+A1:1997
resp. the Degree of Endangerment 1 in
accordance with IEC 60825-2:1993.

Non-visible LED radiation.
Do not look into the beam, not even with
optical instruments. LED class 1M.

Classification according
IEC 60825-1:1993+A1:1997+A2:2000.