Installation
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Inserting modules
You can insert Ex d and Ex-q modules into one backplane. Also note the reference to IECEX
certification from Chapter 2.6.
1. Write down the module types used or other identification codes using labeling strips, which
you can stick between the female connectors of the backplane. The labeling strips should be
no thicker than normal paper so that the I/O modules engage properly at all times.
Figure 3.6
An example of backplane labeling
2. Arrange the modules on the backplane from left to right.
3. Push the I/O module into the slot until you hear and feel both rear catches snap into place.
The I/O module must engage twice.
Note!
If you use redundant gateways, establish a front connection between the primary com unit and
the redundant com unit before you insert the redundant gateway into the backplane. This
ensures that communication between the gateways begins immediately after the power supply
is established.
