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4.3.4
Mounting the Electronics Modules
NOTES
Wire the base modules prior to mounting the electronics modules.
The electronics modules are fitted with two-piece mechanical module coding. When the
modules are delivered, both parts of the coding are anchored to the module. When moun-
ting an electronics modules for the first time in a base modules, a part of the coding is auto-
matically anchored in the base module. When removing the electronics module this part
remains in the base module. This ensures that when replacing an electronics modules only a
module of the same type can be inserted in the base module. When you install an electronics
modules in a base module for the first time, you will feel light resistance, while the coding ele-
ment is anchored in the base module. Nevertheless push the electronics modules all the way
into the base module until it clicks into place.
Before shipment: Both coding elements are attached
to the slice module.
Do not use excessive force if an electronics module cannot be inserted in a base module. In
this case, check whether a code element is already installed in the base module.
Prior to mounting the electronics modules the head station, the base modules, the end bracket
and the end plate must be anchored onto the DIN rail.
Check whether the correct base module is installed for the electronics module (see
chapter 1.3.2). Push the electronics modules into the base module until it clicks into place.
Head station
MELSEC ST Series
Coding element
Base modules
When a slice module is remounted, the coding ele-
ments are separated.
Coding element
Slice module
DIN rail
Installation
Coding element
35
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