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Can the 20 and 28 pin 'Hardened' X80 IO modules use standard cables and terminal blocks?

Published date: 22 July 2019

Issue
Hardened terminal blocks are available for the 40 pin X80 'hardened' modules. Do the 20 and 28 pin 'hardened' X80 IO modules also have hardened connectors?

Product line
Modicon X80 IO

Resolution
The X80 40 Pin 'Hardened' modules include 'gold plating' and the standard connectors have 'tin' connections. It is for this reason that 'Hardened' terminal blocks must be used with the 40 pin 'Hardened' modules. This mixing of metals is not recommended. The issue does not exist with the 20 and 28 pin 'Hardened' X80 modules so standard terminal blocks and cable assemblies can be used.

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