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EXCEL 500/600 INSTALLATION INSTRUCTIONS
modem connected to the Excel controller serial port, and it
then transmits via GSM like a cellular (mobile) phone.
NOTE: Communication via GSM requires firmware version
V2.3.0 or higher.
IMPORTANT
With the M20T, data communication is possible only
in 900 MHz GSM networks. GSM networks
operating at 1800 MHz or 1900 MHz are not
supported.
The maximum communication speed is determined by the
current GSM standard, which is 9600 baud. Due to a special
transmission mechanism, the effective communication
throughput is lower than 9600 baud – however this will be
noticeable only when high data volumes are transmitted, e.g.
when application download is performed.
M20T Safety Precautions
CAUTION
Use of the M20 Terminal on-board aircraft is
forbidden. Use of a Cellular Engine in an aircraft, such
as for the purpose of wireless connection of an aircraft
based HVAC system to an XBS central, can endanger
navigation, it interferes with the cellular network and it
is illegal. Failure to comply with this prohibition may
lead to temporary suspension or permanent
cancellation of Cellular Engine services for the person
who disregards this prohibition and/or to legal action
against said person.
CAUTION
Users are advised to NOT use the M20T in
automotive service stations.
Users are reminded of the necessity of complying with
restrictions regarding the use of radio devices in fuel
depots, chemical plants and locations where
explosives are ignited.
Additional precautions are as follows:
• When receiving calls on a public highway, such as
a cooling control system of a refrigeration truck
being called by an XBS central, the M20T is not
permitted to use "warning" devices which causes
the vehicle’s horn to sound or the lights to flash.
• Drivers are advised not to use the handheld
microphone or the telephone handset while their
vehicle is in motion, except in emergencies. Use
the hands-free facility to speak only if it does not
divert your attention from the traffic.
• Operation of the M20T can disrupt the operability
of inadequately protected medical devices. Please
address all questions to a doctor or the
manufacturer of the medical device.
• The M20 Terminal shall not be used within wet
environment, such as in public baths.
• If your M20 Terminal, your SIM card or both go
missing, notify your network operator immediately
in order to avoid misuse.
Required Third-Party Equipment
The Siemens M20 Terminal (shown below) is required for
GSM communication. In addition, a 3V Mini SIM card with
personal identification number (PIN) is required for the M20T.
The Mini SIM card, supplied by the GSM Network Provider,
must be released for data communication at 9600 baud.
HANDSET INTERFACE
MOUNTING HOLES
TOP
BOTTOM
SIM CARD READE
R
OPERATING
STATUS LED
FME ANTENNA
POWER SUPPLY
CONNECTOR
SUB-D SOCKET
INTERFA
C
E
V.24 INTERFACE AND AUDIO
Fig. 94. Siemens M20 terminal
A separate telephone number is required for data
communication with the same SIM card (one telephone
number for voice communications and one for data).
Mechanical characteristics:
Weight 145 g
Dimensions (max) LxWxH 107.0 x 63.5 x 31.3 mm
Temperature range -20°C to 55°C
Protection-class IP40
Mechanical vibrations Amplitude 7.5mm at
5 to 200 Hz sine
Max. pulse-acceleration 30 g pulse with 18 ms duration
Air humidity 5–98%
Electrical characteristics:
Operating voltage range 8 to 28.8 Vdc, ±5% ripple
Undervoltage/overvoltage
protection: 0 V / 45 V
Power consumption at 12V <200 mA speech mode,
<14 mA idle mode
Max. line-in/out cable length 2 m (e.g. modified NOKIA 2110
for M20T)
45
EN1R-1047GE51 R0702