Schneider Electric INTERBUS Basic Manual do Utilizador descarregar pdf (Página 12)

Interbus with TSX Momentum Overview

1.2.2 Environmental Specification

The adapter conforms to the environmental specification of the I/O base upon

which it is installed. For environmental specification refer to the TSX Momentum

I/O bases user manual 870 USE 002 00.

1.2.3

Physical Structure

The communication adapter (safety type IP20) is attached to the I/O base making

a connection. Snap–on tabs lock the adapter in place. The adapter can be

released with a screwdriver.

With the I/O base there is a label shipped. It fits into an area on the front side of

the adapter. In this label, you can write the signal names corresponding to the

wired field devices. On the right side of this label, there is a clear window to

identify the type of the Communication Adapter.

1.2.4

Function

The communication adapter has two ports (an incoming remote bus and an

outgoing remote bus) implemented as RS 485 interfaces. The incoming remote

bus is isolated. The interfaces meet Interbus standards (DIN 19258). Each node

regenerates the entire message stream before passing it on the next node. As

each node handles the message stream, it extracts the portion of the message

that is assigned to that node as input data (into the node), and adds output data

(from the node) to the message stream as applicable to that type of node device.

1.2.5

Error Control

The internal voltage supply (Vcc) is provided by the I/O base. Vcc is monitored

and a Reset signal is generated if and when Vcc is not within tolerance. The

isolated voltage (Vcx) for the Interbus interface is generated via a DC/DC

converter and is not controlled.

A Serial Microprocessor Interface controls three display LEDs which indicate the

data transfer (Bus Aktiv, Remote Bus Check, Remote Bus Disabled – refer to

”LED Status Displays” page 24). The internal Watchdog timer is 640 ms and when

expires the LED ”Bus enabled”, is lightened.

When an I/O base signals an I/O–Error, that signal is transmitted to the bus master

via Interbus as a module error.

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Schneider Electric INTERBUS Basic Manual do Utilizador Página 12