ADEMCO AHDR4 Betriebsanleitung Seite 30

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4.2.3.3 Serial tests
If it is necessary to check the keyboard communication channels, there is a simple test to check the integrity of
the serial video and telemetry output.
Disconnect any devices connected to the VIDEO and telemetry A and B connectors and make the following
test cable, using two telephone cables and two RJjack boxes supplied with the keyboard, then proceed with
the test.
Device RJjack1 RJjack2 Device
RS485A white white RS485A
RS485B yellow yellow RS485B
WARNING
Please note: this cable is different from the standard connection cable described in
§ 3.3 - One keyboard per line: standard connection cable, pag.16
Page 27 of 193 MNVADCT_0409
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