Momentum Modbus Plus 170 PNT Series Guia do Utilizador Página 167

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Using the I/O Bus Port
870USE10110 July 2004 167
Guidelines for Momentum M1 I/OBus Networks
Overview This section gives guidelines for creating an I/O bus network using a TSX
Momentum CPU as bus master.
Length The maximum distance between the Momentum CPU master and the farthest slave
is 13 km (8 mi).
Distance
Between Nodes
The maximum distance between nodes is 400 m (1300 ft).
Number of
Devices
A network may consist of as many as 256 nodes, including one Momentum CPU bus
master and up to 255 slave I/O devices.
Acceptable Slave
Devices
An I/Obus slave device can be:
a Momentum I/O base with a 170 INT 110 00 INTERBUS communication adapter
mounted on it
a Modicon terminal block I/O module enabled for INTERBUS communications
a standard INTERBUS module designed by a third party manufacturer
Unacceptable
Slave Devices
The I/Obus network does not support INTERBUS-compatible devices that require
the INTERBUS PCP protocol.
Note: Processors that support IEC are limited to a maximum number of 1408 used
I/O points, regardless of the number of modules.
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