Siemens SIMATIC Distributed I/O System DP/ASi Link Manual de servicio descargar pdf (Pagina 33)

3-7

Distributed I/O System DP/ASi Link

EWA 4NEB 710 6055-02b

3.5 Configuration without Power Supply Connector

In a configuration with a separate power supply, every slave station is sup-

plied with power separately. This power supply must not be fed on the bus

cable.

The T connector for connecting PROFIBUS-DP is imperative for continuous

looping of the PROFIBUS-DP.

You do not feed the power supply over the bus (2-core instead of a 5-core

cable).

A slave station can be disconnected at any time from the bus without ”bus

traffic” being interrupted for the slave stations beyond it, because the PROFI-

BUS-DP is looped through T connectors.

You use cables of different design for the installation:

 If you wish to use prefabricated Siemens cables, please turn to sec-

tion 4.4.4.

 If you wish to prepare your own cables, please turn to section 4.4.7.

Fig. 3-6 shows a possible installation for the configuration without a power

supply connector.

DP/ASi link

External

power supply

PROFIBUS-DP

External

power supply

Two-wire-

cable (!!)

DP/ASi link

Figure 3-6 PROFIBUS-DP looped through T connectors –

external power supply fed separately to every slave station

Definition

Advantage

Cables

Installation

Configuration Options

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Siemens SIMATIC Distributed I/O System DP/ASi Link Manual de servicio Pagina 33