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Product Description

The Model 27A1 & A2 lightning/surge suppressors protect all 24 signal lines in the industry standard DB-25 connector. This connector is used univer-sally for RS-232 and now for the new communica-tions interface known as EIA-530 that uses RS-422 signals. The problem of surge suppression continues to grow as the use of PC systems and their peripher-als expands.

The Model 27A contain 600 watt semiconductor protection circuits for each of the 24 lines. These circuits dump surges to a central ground lug on the bottom of the unit. A heavy gauge wire is then used to conduct the surge to a good earth ground. The protection devices will operate in less than 5 nano-seconds thereby saving the attached device from damage due to the transient.

Since RS-232 and EIA-530 have different voltage requirements, Telebyte offers two versions of the protector. The Model 27A1 is used for EIA-530, which operates with RS-422 voltage levels, while the Model 27A2 is used with RS-232. The Model 27A1 can also be used for MIL-STD-188-114.

The Series 27A is packaged in a small plastic case and contains male and female DB25 type connectors allowing the Model 27A to be placed directly in-line. The ground lug accepts a spade push and terminal crimp which is supplied.

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