Motorola M990 manual Automatic Voltage Detection & Switching

Models: M990

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Entertainment Mute & Auxiliary Alert – Open Collector Connections

Figure 15: Entertainment mute & auxiliary alert – open collector connections.

Automatic Voltage Detection & Switching

The M990 supports both 12V and 24V power supply installations. The phone will automatically detect the supplied voltage and switch accordingly.

74 – Installation Guide

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Motorola M990 manual Automatic Voltage Detection & Switching