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コントロールユニット DSC PC5928のPDF クイック・スタート・マニュアルをオンラインで閲覧またはダウンロードできます。DSC PC5928 16 ページ。 Audio interface module
DSC PC5928 にも：ユーザー・インストラクション (2 ページ)

2.2

Keybus Wiring

The PC5928 Audio Interface module has 4 terminals marked Keybus (red, black, yellow and

green). Connect the four Keybus terminals on the PC5928 to the four terminals on the

PC5010 marked Keybus (red, black, yellow and green).

2.3

Up to 7 audio stations can be connected to the PC5928 Audio Interface module. Each

station must be home run to the interface module via a shielded 22 gauge, 4 wire cable.

Connect each station to power (red - AUX, black - COM) and to the proper audio

connections on the PC5928 module (yellow - speaker, green - microphone). Connect the

drain wire of the shield to the COM terminal on the PC5928 module or the black terminal of

the station (make sure the drain wire of the shield does not short anything on the back of the

board), but not both. Refer to the diagram below:

Avoiding Audio Station Interference Noise

The Keybus wiring and several different electrical devices (fluorescent lighting, etc.) may

induce noise onto the intercom wires. For this reason shielded wire should be used

whenever possible. If shielded wire is not used, each intercom wire must be spaced a

minimum of 4 ft./1.2 m from all Keybus wiring, electrical wiring, fluorescent lighting and other

sources of electrical interference. If this is not possible, shielded wire must be used with the

drain of the shield connected as indicated in the above diagram.

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