CONNECTORS
CONNECTORS ON THE RFU
370 E
NVOY™ TRANSCEIVER REFERENCE MANUAL
Q line
The Q line switches the transceiver between data and voice modes, and stops the
transceiver from scanning. When a modem is connected, settings are chosen that are
suitable for data transmission.
Related links:
Serial data on page 370
Relay contact
The relay can be wired by a user to ring a bell or to sound a car horn. If a voice call is
received, the bell or horn sounds for 2 minutes. If it is an emergency call, it toggles on
and off three times per second, continuing for 5 minutes.
The relay contacts are capable of switching up to 1 A. An additional external relay
must be used to switch high current loads such as bells, car horns, or lights.
The contact can be configured via internal links to do one of the following in the case
of an alarm:
• join pins 6 and 7 together (normal, not available when 600 Ω balanced audio
output is used), or
• switch pin 6 to ground, or
• switch pin 6 to battery volts (A rail)
NOTE: The external alarm is not activated under certain values of Settings >
Calling > Alert Tones.
Related links:
Alert Tones on page 233
Serial data
The serial data (RS232) connector can be used for controlling and monitoring the
transceiver, programming the transceiver settings, and sending and receiving message
calls.
The serial data connector can be used for connecting peripheral devices to the
transceiver.
Related links:
Overview of peripherals on page 192
System power (A rail protected)
System power is switched off when the transceiver is switched off.
WARNING: The total load connected to the A rail protected supply must not exceed
2A.
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