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Installation Manual

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4.2.1.7.6 Connecting a Doorphone<br />

2 doorphone types are available, depending on the operating mode used:<br />

- Type A: relay-controlled doorphones (e.g. NPTT)<br />

- Type B: doorphones controlled by MF Q23 signals requiring an SLI interface (e.g.<br />

TELEMINI and UNIVERSAL DOORPHONE)<br />

The doorphone interface comprises an intercom and an optional latch powered by the mains<br />

supply through a SELV (Safety Extra Low Voltage) transformer.<br />

It is connected via the DOORPHA and DOORPHB outputs (control contacts open when idle)<br />

of the DOORPHONE connector.<br />

Connecting a NPTT Doorphone<br />

4-17

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