Rockwell-automation 1757-FFLDC4 ControlNet Foundation Fieldbus Linking Manual de usuario descargar pdf (Pagina 13)

ControlNet Foundation Fieldbus Linking Device 13

Publication

1757-IN022B-EN-P - August 2009

Wiring the Linking Device

To wire the linking device, complete the following sections.

Wire Requirements

The FOUNDATION Fieldbus recommendation for the cable connecting

fieldbus devices is Type A, 0.8 mm

(18 AWG) shielded, twisted-pair wire. It is

important to calculate how the planned topology for your fieldbus segment,

selected wiring, supplied power, and intended mix of fieldbus devices may

impact the overall performance of a fieldbus network. For more information,

see the F

OUNDATION Fieldbus specifications at http://www.fieldbus.org,

publication AG-140

ControlNet Ports

WARNING

If you connect or disconnect the communication cable with power applied to

this module or any device on the network, an electrical arc can occur. This

could cause an explosion in hazardous location installations. Be sure that

power is removed or the area is nonhazardous before proceeding.

IMPORTANT

In a non-redundant system, connect the ControlNet cable to Port A on the

linking device. Port B is left unconnected.

In redundant system, all devices on a channel must be connected through

the same cable. That is, all channel A device ports connect to one cable; all

channel B device ports connect to the other cable.

44419

Connect your ControlNet cables to the ControlNet

ort on the side of the linking device. Two ports

(A and B) are provided for redundant media

ControlNet connections.

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Rockwell-automation 1757-FFLDC4 ControlNet Foundation Fieldbus Linking Manual de usuario Pagina 13