TMQ AP4 - External Alarm Installation

TMQ AP4 Autopilot (AP4S10) 37 of 62 Version 4.96 9/10/2017
Heading Data Priority
The AP4 is able to operate with both TMQ electronic compass (COMMAG)
and NMEA heading data input connected. The pilot will accept the NMEA
heading data as first priority.
If the NMEA data is not present the AP4 will display the heading received from
the standard compass (COMMAG - if fitted).
If the NMEA data fails during operation, the unit will revert to the standard
compass and the alarm will sound. The alarm can only be cancelled by turning
the AP4 off and on again.
External Alarm Installation
Note: not available if connected to BNWAS.
For non survey vessels an external alarm is optional.
For vessels needing the commercial watch alarm feature fitted for survey
requirements, an external alarm is required in addition to the AP4 internal
buzzer.
This alarm will sound if the timer alarm has been sounding for one minute
without being reset and autopilot is NOT in SET mode.
A 12 Volt piezo buzzer with current draw not exceeding 250 milliamps should
be used (TMQ Part No. SIREN). If a siren or alarm unit is used which draws in
excess of 250 milliamps, this should be connected via a relay.
The external alarm circuit is used to energise the siren direct. For larger units
the circuit energises a relay coil with the siren being energised via the relay
contacts.
To Install External Alarm Siren
 Mount SIREN in appropriate position for optimum effect (leads may
have to be lengthened)
 Remove top cover of AP4