7
transmission upon network connection. Stored data are purged after transmission to iNet Control or when
the data have aged more than 12 hours,
whichever comes first; data are purged every 30 minutes.
TGX Gateway cellular communications are secured through HTTPS. Satellite communications are byte
encoded.
TGX operation and vehicle power
To allow TGX operation to continue after the vehicle ignition is turned off and to maintain the desired
minimum battery voltage for the vehicle, use the features described below. These customer-settable
options are accessed through an internet connection to the TGX Configuration Manager (TCM), which is
discussed in
Keep awake
Enable the
keep-awake
feature to permit the TGX to continue operation after the vehicle is turned off. Set
the amount of time the unit will operate (keep awake) between engine shutdown and TGX power off. The
critical low voltage
feature, discussed below, overrides the keep-awake feature.
Critical low voltage
Use the
critical low voltage
feature
and your knowledge of the vehicle’s power system to set the
battery
voltage at which the TGX will power itself off. Battery voltage requirements vary by vehicle and can be
affected by operating conditions, battery condition, and other factors. The critical low voltage value should
reflect the customer-determined minimum voltage that will achieve the following:
•
Prohibit a running engine from the full loss of its battery power.
•
Prohibit a nonrunning engine from completing an ignition cycle.
Notes:
10 VDC is the minimum voltage required for TGX start-up.
If the vehicle’s b
attery becomes depleted below the
critical low voltage
threshold, to restore power to the TGX, you may need to
disconnect, then reconnect the power cable to the unit.
Antenna and Power Cable Requirements
TGX wireless communications require the installation of compatible external antennas only from Industrial
Scientific. As indicated below, both the
TGX Primary Antenna
and
TGX Satellite Antenna
are required.
Table 2.2 Required TGX cables
Item (part number)
Description
TGX Primary Antenna (17159196)
Supports LENS Wireless functionality, GPS signal reception, and cellular
transmission.
TGX Satellite Antenna (17159693)
Supports satellite transmission.
TGX Gateway Power Cable (17159072)
Locking six-pin Molex plug with three wires (battery and ignition wires require
fused connections)
