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EXCEL 500/600 INSTALLATION INSTRUCTIONS
Protection fuse
Max. RF power
Power supply connector
CE conformity:
• 89/336/EC (EMC guideline)
• 73/23/EC (Low voltage guideline)
• 91/263/EC (Telecommunications devices guideline)
Standards:
• EMC: ETS 300 342-1
• Safety: EN 60950
• GSM network: TBR 19, TBR 20
Serial Cable
For connecting the M20T to the Excel 500 controller, a
standard RS232 cable (9-pin V24 sub-D sockets) is required.
GSM Antenna Requirements
All major suppliers of GSM antennas can supply GSM900
Antennas with FME plugs to connect with the M20 Terminal
for a variety of applications. Some antenna examples are
shown below.
The antenna must satisfy the following electrical
requirements:
Frequency TX
890-915 MHz
Frequency RX
935-960 MHz
Impedance
50 ohms
VSWR TX:
max. 1.7:1 installed
VSWR RX:
max. 1.9:1 installed
Gain
> 1.5 dB referenced to λ/2 dipole
3dB width of cone
vertical:
80°
horizontal:
360°
Max. power:
1 W (cw), 2 W peak; at ambient
temperature of 55°C
Depending on the application and the RF field at the local
site, the GSM antenna may be mounted directly or via cable.
The maximum antenna cable length is 8.0 m (including 20 cm
M20 Terminal-cable)
NOTE: The maximum number of push/pull cycles shall not
exceed 100.
The antenna interface connector of the M20 unit is a FME
connector (of type SMR nano (male)). Hence, the connector
on the GSM antenna or antenna cable has to be of type SMR
nano (female, or use a double female connector in between).
EN1R-1047GE51 RR0902
1 A, fast blow
2 W at 900 MHz
6-pin modular
Antenna Examples
Fig. 95. Round radiation antenna, magnetic base, 5 DBi
Fig. 96. Directional antenna (YAGI), 12 DBi
Fig. 97. Round radiation antenna, 6.5 DBi
Fig. 98. Window patch antenna, 2 DBi
46
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