4
Fläkt Woods
8822 GB 2011.09
Control equipment
Speci
fi
cations are subject to alteration without notice
Installation & maintenance
Transmission type and method
• Digitally modulated RF burst signal
• GMSK in accordance with GSM05.04
• Half duplex
• Bidirectional
Interference immunity
• Electrostatic discharge requirements in
accordance with ETS 300-342-1
• Electrical fast transient burst requirements
(cable is >3m)
• Surge immunity requirements not speci
fi
ed
• Electrostatic discharge requirements in
accordance with ETS 300-342-1
• Immunity RF common mode 0.15–80 MHz in
accordance with ETS300-342-1
RS232 interface
The RS232 interface is the interface for the applica-
tion software and the connection to the PC. The
customer application communicates with the TC35
Terminal or the TC35 GSM engine by means of
ATcellular commands. The RS232 interface is imple-
mented as a 9-pin D-Sub socket with a screw
fi
tting.
RS232 interface – 9-pin D-Sub
Use and operation
In order to control the Terminal and transfer data,
the customer application (e.g. host computer) is
connected via the RS232 cable
Interference immunity
• The connecting cable must not exceed 1.8m in
length.
• Nominal signal range: ±15V
• Max. load current 1A
• Electrical fast transient burst requirements not
speci
fi
ed
• Surge immunity requirements not speci
fi
ed
• Electrostatic discharge requirements in accor-
dance with ETS 300-342-1
• Immunity RF common mode 0.15–80MHz in
accordance with ETS300-342-1
Startup
Before startup, the components required for your
application must be connected. The SIM card must
be inserted in a de-energized state.
The TC35 Terminal is ready for operation when
supply voltage is applied and the ignition line is ac-
tivated. If the recommended plug-in power supply
unit is used, the ignition line is already connected
to the supply voltage line, and the TC35 Terminal
is thus immediately switched to the active state. It
starts the network search and registers with net-
work operator. Please read the following conditions
for switching the Terminal on and off:
Switching on Terminal
Simply applying supply voltage (+ to pin 1 and
GND to pin 6) alone is not enough to switch on the
TC35 Terminal.
It can be switched on in two different ways:
Activation of the IGT_IN ignition signal on the
power supply connection
The switching regulator is switched on with the
IGT_IN=high signal. When the switching regulator
is switched on, VBAT is generated as the operating
voltage for the GSM module. This still does not
activate the GSM module. Triggered by VBAT, a
transistor switch generates the IGT ignition signal
with a delay of approx. 100ms for the GSM module.
Only then is it switched on. (It exits the POWER
DOWN operating state.)
In its energized state, the GSM module provides the
supply voltage (VDD). VDD ensures that the swit-
ching regulator remains on, even when its closing
condition is lost (i.e. IGT_IN=low).
Explanation:
VBAT=operating voltage for the GSM module
VDD=supply voltage from the module
