Technical data

Installation & Operation Manual GM-TTT
Page 62
5.3 GPS IN Option: Installation of a GPS Receiver
If a GPS receiver is installed in the GM-TTT, only the antenna remains to be connected at the
OPTION 1 connector of the rear panel.
The GPS Module:
(LED green)
Battery
2500-1001-01
S1
on
8
1
2
3
45 6
7
1
2
X1
(LED red)
The GPS receiver is equipped with an auto-
nomous, battery-buffered clock which
continues to count the time during power
failure or in free-run mode - when no signal is
received. This clock is set as soon as
synchronisation is achieved, and generally it is
sufficient to perform synchronisation again
once or twice a day. The receiver transmits
time, date and status data to the processor of
the GM-TTT via an internal serial interface.
Generally the time zone of the GPS module is
set to UTC, i.e. no DST is available.
The specifications of the receiver and the antenna installation are separately described in the
manual entitled “GPS Receiver (Built-In)“.
Battery 3V Lithium, battery life: 10 years
Battery exchange
CAUTION: Danger of explosion if battery is
incorrectly placed. Replace only with the same or equivalent
type recommended by the manufacturer. Discard used
batteries according to the manufacturer’s instructions.
Additional Power Supply via DC IN GPS:
The GM-TTT offers an additional power supply input for the installed GPS receiver. The DC IN
GPS (DSUB9M) connector only supplies power to the GPS receiver, whereas the DC IN
(XLR4M) connector supplies power to the whole equipment. If a voltage is applied to DC IN
(XLR4M), the power supply via DC IN GPS is interrupted by a relay.