Siemens SIMATIC NET PROFIBUS Instruções de Operação descarregar pdf (Página 27)

Product Characteristics

4.2 Installation

SIMATIC NET PROFIBUS Optical Link Module OLM V4.0

Operating Instructions, 01/2013, C79000-G8976-C270-03

4.2 Installation

4.2.1 Safety related notices

Note: If PROFIBUS OLMs are supplied via long 24 V supply lines or over networks, measures must be

taken to prevent interference by strong electro magnetic pulses on the supply lines. These can occur, for

example, due to lightning strikes or when heavy inductive loads are switched. The robustness of the

PROFIBUS OLM against electromagnetic interference was verified by the Surge Immunity Test according

to EN61000-4-5. For this test, overvoltage protection for the voltage supply lines is necessary. The Dehn

Blitzductor VT AD 24V Type no. 918402 or a comparable protection element is, for example, suitable.

Manufacturer: DEHN+SÖHNE GmbH+Co.KG Hans Dehn Str.1 Postfach 1640 D-92306 Neumarkt,

Germany

Note: Under foreseeable circumstances, the accessible optical radiant power of the components used

represents no danger and meets the requirements for class 1 according to IEC 60825-1 Ed.1.2:2001-08.

Nevertheless, avoid looking directly into the transmitter or into the end of a fiber-optic cable.

Only use the PROFIBUS OLM in the way intended in these operating instructions.

In particular, observe all warnings and safety-relevant notices.

Run the modules only with a safety extra-low voltage of a maximum of +32 V DC (typically

+24 V DC) according to IEC 950 / EN 60 950 / VDE 0805. According to the UL/CSA-approval,

the power supply unit must meet the requirements of NEC, Class 2. Protective measures must

be taken to avoid the rated voltage of the equipment being exceeded by more than 40% by

transient overvoltages. This is the case if the equipment is supplied exclusively by SELV

circuits. Only the connectors supplied may be used for the electrical connection of the OLM,

(applies also when replacement parts are used). When using the existing connectors (e.g.

OLM V3), the proper contact cannot be guaranteed because of different pin diameters! The

supplied connectors must also be plugged in to achieve IP40.

Observe the electrical limit values when connecting voltage to the signaling contacts: 50 V DC,

30 V AC (CE) / 30 V DC, 30 V AC (cULus). The connected voltage must also be a safety

extra-low voltage according to IEC 950/ EN 60 950/ VDE 0805 and must to meet the

requirements of NEC, Class 2 in accordance with the UL/CSA approval.

WARNING: If temperatures in excess of 70 °C occur on the cable or at the cable feed-in point,

or the temperature at the branching point of the cables exceeds 80 °C, special measures need

to be taken. If the equipment is operated at an ambient temperature of 50 °C – 60 °C, use

cables with a permitted operating temperature of at least 80 °C.

WARNING: – Explosion Hazard – Do not disconnect while circuit is live unless area is known

to be non-hazardous.

DANGER: Never connect the PROFIBUS OLM to mains voltage.

Choose the installation location so that the climatic and mechanical limit values as specified in

the technical specifications can be met.

WARNING: All PROFIBUS OLMs are approved for operation in the hazardous area zone 2

according to Ex nA IIC T4 Gc. In this case, the modules must be installed in a suitable

enclosure (cabinet) providing degree of protection IP54 according to IEC 529. In this situation,

the supplied connectors must be assembled. The fiber-optic bus lines may be laid in or

through a Zone 1 hazardous area only with an OLM that is appropriately labeled (see type

plate, Ex nA [op is Gb] IIC T4 Gc and see also section 6.5 Ex approval).

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 63 64

Comentários a estes Manuais

Sem comentários

Siemens SIMATIC NET PROFIBUS Instruções de Operação Página 27

Comentários a estes Manuais

Manuais e produtos relacionados com Redes Siemens SIMATIC NET PROFIBUS