General Notes On Installation And Startup - Siemens SIMATIC NET PROFIBUS Owner's Manual

Infrared Link Modul (ILM)
7.2

General Notes on Installation and Startup

First, select the network topology suitable for your system.
You can then install and start up the PROFIBUS ILM step-by-step as shown below:
3
Check the area for suitable sites where you can install the modules.
3
Make mounting brackets suitable for the sites you have chosen. Chapter 8 describes an example of a
general-purpose support consisting of two identical mounting brackets that are easy to make.
3
Remove the four cover screws and disconnect the 20-pin ribbon cable from the basic module and then
remove the top panel of the PROFIBUS ILM.
+
Caution:
Disconnect the cable by pulling out the connector, do not pull the cable itself !
Do not touch the electronics module in the top panel !
Do not loosen the screws securing the electronics module !
3
Mount the PROFIBUS ILM on the support or device using two screws.
3
Ground the PROFIBUS ILM with low resistance.
3
Connect the PROFIBUS cable(s) and the power supply and signaling contact cable. In awkward locations,
it is sometimes better to connect the cables before actually mounting the modules.
3
Depending on your bus topology, activate or deactivate the terminating resistor (active when the ILM is at
the end of the cable, deactivated if the ILM is looped into the cable),
3
Set the transmission rate configured in the PROFIBUS network to the same setting on all PROFIBUS
ILMs of a PROFIBUS network using the switches.
3
Set the "monitor link with acknowledgment pulse" mode for a point-to-point link, if required.
3
Set the errors to trigger the signaling contact using the switch if you want to use the signaling contact for
monitoring.
3
Plug in the ribbon cable of the electronics section into one of the coded plug connectors on the basic
module. The plug connectors are coded to prevent reverse polarity.
3
Replace the top cover of the PROFIBUS ILM using the four cover screws.
3
Align the PROFIBUS ILM to the partner station so that the emission of the PROFIBUS ILM is along the
optical axis to the partner ILM.
3
Test the arrangement with power applied but without data exchange.
Only the green POWER LED must be lit.
3
Test the transmission link with data exchange.
The yellow TX and RX LEDs should be lit as well as the green power LED.
The red "ERROR" LED must not be lit since this indicates too much extraneous light which always causes
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