QTech CM910 Quick Start Manual - Technical Details
CM910 Cellular Modem
– Quick Start Guide – v2.0 October 2014
www.qtech.co.nz Ph: +64 3 366 3713 Page 6
Technical Details
Operating Voltage
1
:
12
– 24 Volts DC
Power Connector:
2.1mm DC Socket, centre pin positive
Operating Current:
~14mA @ 12V
~10mA @ 24V
Aerial
2
:
50Ohms, SMA connector
USB Port
3
:
Type B socket
RS232 Port
4
:
DB9 female connector
Operating Conditions:
0 - 70
C
90% humidity, non-condensing
Case Size:
112 x 75 x 25mm (Overall)
Weight:
261 grams (with supplied aerial)
Mounting Holes:
Qty 4x M4 mounting holes at ~102 x 50mm centres
RSM SCN:
Z891
Modem specifications
5
:
GSM/UMTS/HSPA+ bands (MHz) 800/850, 900, 2100
1. The CM910 is over voltage protected by a 30 volt Zenner diode. Voltages greater than this
will blow the internal 500mA fast blow fuse.
The supply voltage should be clean, continuous and transient free.
Warning
– Do NOT use Switch Mode Power Supplies (SMPS) with this product. The DC
power supply used for this product MUST have a grounded negative or be a “linear”
transformer based plug pack. The reason is that the aerial, programming port and external
connections can provide exposed earth points and the SMPS can impose an AC voltage on the
DC ground, which can lead to damage. Suitable cost effective plug packs are available from
QTech P/N PD5412, PD5413 & PD5414.
2.
The
reliability of all cellular products is dependent on good signal strength. Before deciding
on the Telco to choose, please check coverage. We suggest that a cellular phone is taken to
site, to check the signal strength, i.e. how many “bars” are displayed.
The supplied stub aerial (P/N PD9230) should be suitable for locations with good cellular
coverage (full bars) and where the CM910 is in a non-conductive enclosure (plastic etc).
Other external mounting aerial options are available; contact your equipment supplier for
more details.
Warning
– Do NOT operate the CM910 without an aerial connection.
3. Can be used as an AT command control interface to a PC. Please refer to Installation and
Operation Notes.
4. Used as an AT command interface to either
XL4 RTU via the provided DB9 (male) to RJ45 serial cable
Pc via a standard straight through RS232 cable
5. Provides connectivity with all current New Zealand telecommunications companies (Spark,
Vodafone and 2 Degrees).