TD 92351GB
2007-03-15/ Ver. C
User Manual
Ascom a51 Alarm Transmitter
2
1.2 Ascom a51 Versions
The a51 Alarm Transmitter included in the Personal Security System, is easy to carry and
operate and is designed to function in tough environments. It is available in two different
versions, basic and advanced:
Functions a51 Basic a51 Advanced
Push-button alarms Yes Yes
Pull-cord alarm Yes Yes
Vibrator alert Yes Yes
Man-down & No-movement alarm No Yes
Acoustic Location Signal (ALS) No Yes
Location function (IR and LF) No Yes
Battery check function Yes Yes
Alarms are transmitted on the UHF band 420-475 MHz. The code format is compatible
with the System 900, which means that functions and units from the two systems can be
integrated with each other.
2 Description
2.1 Ascom a51 Alarm Transmitter
Case
The case is made of durable PC/ABS plastic and is IP40 classified. The Alarm Transmitter
also fulfils IEC 68-2-32 procedure 1, which makes it drop proof from one meter onto
concrete.
Antenna
The antenna used for communicating with the fixed system is integrated in the Alarm
Transmitter. This makes the Alarm Transmitter robust and easy to handle.
Top
The transparent smoke coloured top covers the IR receiver, integral name label. On the top
is also the LED.
Buttons
The Alarm Transmitter has three buttons, see also figure 1 on page 1:
Alarm button, big button on the front of the handset, for sending alarm. The button can
also be used for test alarm. The function of this button is configurable.
Soft-alarm button, small button marked with "!"used as a request for discreet
assistance. The button can also be used for test alarm. The function of this button is
configurable.
Mute button, button on the right side, used to silence the beep, vibrator and LED signal
including the Acoustic Location Signal (ALS).
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