Siemens simatic ET 200MP - Replacement of I;O Modules and Front Connectors; Coding Element on the I;O Module and on the Front Connector

Maintenance
9.2 Replacement of I/O modules and front connectors
ET 200MP Distributed I/O System
86 System Manual, 01/2013, A5E03723484-01
9.2 Replacement of I/O modules and front connectors
9.2.1 Coding element on the I/O module and on the front connector
Introduction
All front connectors for the ET 200MP I/O modules are identical. The coding element
prevents a front connector from being inserted on a module with a different electrical pin
assignment.
In the delivery state, the coding element is located in the I/O module.
Figure 9-1 Coding element in the I/O module (delivery condition)
When the front connector is inserted into the I/O module for the first time, one half of the
coding element latches into the front connector. When the front connector is removed from
the I/O module, this half of the coding element remains in the front connector, while the other
half remains in the I/O module.