astra telematics AT240 Руководство пользователя - Страница 6
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Печатать страницуEnclosure Sealing
When fitting the enclosure cover, please ensure that both clips are snapped into place to
guarantee IP67 sealing.
Power requirements
The AT240 operates from a DC Voltage between 5 and 50 Volts. We recommend that a
permanent 'live' power source is used to supply the AT240. If current drain is of concern, please
refer to the power management section for options to minimise vehicle battery drain when
stationary for long periods.
Back-up Battery
The AT240 operates from the external voltage source, with an internal back-up battery to allow
continuous operation for short periods without external power. The device will maintain the
battery charge level and seamlessly switch to battery power if the external voltage source fails or
fall outside of the permitted range. Note that the operating temperature range of the AT240 is
reduced when the battery option is fitted (see Specifications section). Please also note the
handling precautions for lithium polymer batteries as outlined in the AT240 Installation Guide.
Fuse Recommendations
Typical current drain is 25mA @ 13.8VDC and 14mA @ 27.6VDC, although maximum peak
current can be around 0.5A for short periods. We recommend the use of 1A fuses in the power
feeds and ignition sense wires.
Internal Status LEDs
The AT240 has 2 internal status LEDs, which indicate GPS/GNSS status and GSM/UMTS network
status, as per the description below:
GPS/GNSS LED
ON CONTINUOUSLY
FAST DOUBLE FLASH
OFF
GSM/UMTS LED
OFF
100mS ON / 2S OFF
DOUBLE 50mS ON / 2 SEC OFF
DOUBLE 100mS ON / 2 SEC OFF
50mS ON / 50mS OFF
ON CONSTANTLY
800mS ON / 200mS OFF
GPS /GNSS STATUS
device is powered-up and is searching for first location fix
good fix received, typically 1Hz flash (once per second)
device has current no location fix
no network service
Registered on home network 2G service
Registered on home network 3G service
Registered on roaming network 2G service
Registered on roaming network 2G service
device is currently transmitting data on home network
device is currently transmitting data on roaming network
GSM / UMTS NETWORK STATUS