Profibus Module; Profibus Cable Connector; Pc To Inverter Connection Kit; Bop/Aop Door Mounting Kit For Single Inverter Control - Siemens MICROMASTER 420 Reference Manual

4.3.3

PROFIBUS Module

The PROFIBUS module allows full PROFIBUS connection of up to 12 Mbaud. You
can supply the module from an external 24 V supply which keeps PROFIBUS
active even when the inverter is removed from its power. The module permits full
remote control of PROFIBUS or local control or a mixture of both. Connection to
the module is made using a 9-way sub D-Type connector.
4.3.4

PROFIBUS Cable Connector

When the PROFIBUS module is fitted to the inverter, the RS485 interface is not
available. The RS232 interface may, however, continue to be used for BOP or
AOP connection.
4.3.5

PC to Inverter Connection Kit

The PC to Inverter Connection Kit is used for controlling an inverter directly from a
PC provided the correct software has been installed (Refer to Chapter 3
Communications). The hardware includes an opto-isolated RS232 adapter board
for reliable point-to-point connection.
The RS485 interface remains available for other uses.
4.3.6

BOP/AOP Door Mounting Kit for Single Inverter Control

This kit is used to mount an operator panel in a cabinet door. The kit contains a
cable adapter board with screwless terminals for use with your own cables.
This kit extends the existing RS232 interface, bringing connections and power from
the interface connector to terminals, which can then be wired to the AOP or BOP
mounted in the door. Although RS232 should be limited to 3 m of cable, up to
20 m of cable can operate satisfactorily, but this is not guaranteed.
The RS485 interface remains available for other uses.
4.3.7

AOP Door Mounting Kit for Multiple Inverter Control

The AOP can communicate with several inverters by means of the RS485 USS
protocol. This kit allows connection to these inverters through a control cabinet
door.
In this installation, the AOP connects to the RS485 interface on the inverter, and
also takes 24 V power from the unit. If further inverters are connected, they can be
'daisy chained' using the RS485 terminals on each inverter. The AOP can then
communicate with all inverters using the RS485.
RS485 connections can operate over long distances, typically several hundred
metres, but the connection from the AOP to the first inverter includes the supply, so
this should be limited to 25 m.
An isolated RS232 interface is also provided on the kit which allows
communication between the AOP and a computer for example. In this case the
RS485 is fully utilized; the RS232 interface on the inverter can then be used by a
second BOP or AOP if required.
74
MICROMASTER 420 Reference Manual
Issue A1