astra telematics AT240 Manuel de l'utilisateur - Page 6

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Enclosure 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

device is currently transmitting data on home network

device is currently transmitting data on roaming network

GSM / UMTS NETWORK STATUS