The ABB SPA-ZC22 is a bus connection module that was used in ABB’s SPACOM relay protection and control system. It was used to convert between the optical signals of the SPA bus and RS 485, SPA (+5 V), or RS 232 signals.

Here are some key things to know about the ABB SPA-ZC22:

• Function: It converts optical signals of the SPA bus to RS 485, SPA (+5 V), or RS 232 signals and vice versa.
• Compatibility: It connects to any SPACOM device provided with a D-type connector.
• Connectors: It has one 9-pin D type subminiature connector for RS 485 or SPA connections, one 25-pin D type (optional), and two or five opto-connector couples for fibre-optic cables.
• Status: It is a discontinued product.

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