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GSM modem with 485 serial support--WESTERMO
GDW-11 485
     Product Information
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The GDW-11 485 is a modem designed to allow connection of legacy RS-232, RS-422 and RS-485 serial equipment over a GSM/GPRS network. The AT command driven modem operates over the GSM/GPRS networks providing speed up to 14.4 kbit/s on GSM or 85.6 kbit/s when using GPRS.

The GDW-11 485 is designed for use in heavy duty industrial applications. The wide power range, galvanic isolation and the design of the termination and fail-safe circuit guarantees communication in the worst environments.

Only industrial grade components are used which gives the GDW-11 485 an MTBF of 1,100,000 hours and ensures a long service life. A wide operating temperature range of –25 to +70°C (–13 to +158°F) is achieved with no moving parts.

The GDW-11 485 has been tested both by Westermo and external test houses to meet many EMC, isolation, vibration and shock standards, all to the highest levels suitable for heavy industrial environments and rail trackside applications.

The modem is simple to configure both by DIP switches as well as by the Westermo GD-tool software; standard commands can easily be entered, and saved configurations downloaded. RS-232 connections can be made using screw connections as well as the standard D-sub. The modem is designed to be connected to devices with no ability to control dialing so special functions like data dialing and DTR dialing are provided to enable these devices to automatically establish connections.

GDW-11 485

 

Product description
Status Active
Article number 3615-0030
Ports 1 x 300 bit/s to 115.2 kbit/s, RS-232.
1 x 1200 bit/s to 115.2 kbit/s, RS-422/485.
1 x SIM slot.
Description GSM modem, GSM / GPRS
Warranty period 5 Years
Standard compliance
R&TTE Article 3.1b
EN 301 489-1, EN 301 489-7
Article 3.2
EN 301 489-1, EN 301 419-1, EN 301 511
Reliability prediction
Service life, operating Operating, 10 year
EMC (Electromagnetic Compatibility)
EN 61000-6-2 Immunity industrial environments
EN 55024 Immunity IT equipment
EN 61000-6-3 Emission residential environments
FCC part 15 Class B
EN 50121-4 Railway signalling and telecommunications apparatus
IEC 62236-4 Railway signalling and telecommunications apparatus
EMC specifications
EN 61000-4-2, ESD Enclosure contact, ± 6 kV
Enclosure air, ± 8 kV
IEC 61000-4-3, RF field AM modulated Enclosure, 20 V/m 80% AM (1 kHz), 80 – 2000 MHz
ENV 50204, RF field 900 MHz Enclosure, 20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
EN 61000-4-4, fast transients Signal ports, ± 2 kV
Power ports, ± 2 kV
EN 61000-4-5, surge Signal ports unbalanced, ± 2 kV line to earth, ± 2 kV line to line
Signal ports balanced, ± 2 kV line to earth, ± 1 kV line to line
Power ports, ± 2 kV line to earth, ± 2 kV line to line
EN 61000-4-6, conducted RF immunity Signal ports, 10 V 80% AM (1 kHz), 0.15 – 230 MHz
Power ports, 10 V 80% AM (1 kHz), 0.15 – 230 MHz
EN 61000-4-8, power frequency magnetic field Enclosure, 100 A/m, 50 Hz, 16.7 Hz & 0 Hz
EN 61000-4-9, pulsed magnetic field Enclosure, 1000 A/m, 6.4 / 16 ms 5 pos/5neg pulse in XYZ direction
EN 61000-4-11, Voltage dips and interruption AC power ports:
10 & 5 000 ms, interruption
10 & 500 ms, 30% reduction
100 & 1 000 ms, 60% reduction
EN 61000-4-16, Mains freq. 50 Hz Signal ports, 100 V 50 Hz line to earth
SS 436 15 03, Mains freq. 50 Hz Signal ports, 250 V 50 Hz line to line
EN 61000-4-29, voltage dips and interruption DC power ports:
10 & 100 ms, interruption
10 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
EN 55022, radiated RF emission Enclosure, class B
FCC part 15, radiated RF emission Enclosure, class B
EN 55022, conducted emission AC power ports, class B
DC power ports, class B
FCC part 15, conducted emission AC power ports, class B
Safety
Safety EN 60950, IT equipment
EN 60950-1, dielectric strength Signal port to other isolated ports, 2 kVrms 50 Hz 1 min
Power port to other isolated ports, 3 kVrms 50 Hz 1 min, 2 kVrms 50 Hz 1 min (@ rated power <60 V)
Climatic
Temperature, operating –25 to +50°C (–13 to +122°F)
Temperature, storage –30 to +85°C (–22 to +185°F)
Humidity, operating 5 to 95% relative humidity
Humidity, storage 5 to 95% relative humidity
Enclosure
Enclosure UL 94, PC / ABS, flammability class V-1
Dimensions (W x H x D) 34 x 123 x 121 mm (1.33 x 4.84 x 4.76)
Weight 0.2 kg
Degree of protection IP 21
Cooling Convection
Mounting Horizontal on 35 mm DIN-rail
Mechanical
IEC 60068-2-6, vibration Operating
7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
IEC-60068-2-27, shock Operating, 15 g, 11 ms
Interface specifications, power
Rated voltage 12 to 48 VDC
Operating voltage 10 to 60 VDC
Rated current 350 mA @ 12 VDC
150 mA @ 24 VDC
75 mA @ 48 VDC
Rated frequency DC
Inrush current 0.05A2s
Startup current 0.75A peak
Polarity Reverse polarity protected
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm2 (AWG 24-12)
Isolation to All other ports 3 kVrms 50 Hz 1 min
Shielded cable Not required
Interface specifications, RS-232
Electrical specification RS-232 V.24
Data rate 300 bit/s – 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or no parity, 1 or 2 stop bits
Protocol Transparent
Retiming Yes
Transmission range 15 m / 49 ft
Isolation to Power port 3 kVrms 50 Hz 1 min
Connection 9-pin D-sub female (DCE) and 5 pos Detachable screw terminal (DCE)
Connector size Detachable screw terminal 0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cable Not required
Conductive housing Isolated to all other circuits
Interface specifications, RS-422/485
Electrical specification EIA/TIA-485 ITU V.11
2-wire or 4-wire twisted pair
Data rate 1 200 bit/s – 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits.
9-11 bit words
Protocol Transparent
Retiming Yes
Turning time <10 ms (half duplex)
Transmission range ≤ 1200 m, depending on data rate and cable type (EIA RS-485)
Settings 120 Ω termination and failsafe biasing 680 Ω
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Power port 3 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cable Not required
Miscellaneous Do not connect RS-232 and RS-422/485 simultaneously
Interface specifications, Antenna
Frequency bands GSM900 TX 880 – 915 and RX 925 – 960 MHz
GSM1800 TX 1710 – 1785 and RX 1805 – 1880 MHz
Data rate CSD: up to 14.4 kbit/s, GPRS: up to 85.6 kbit/s
Connection SMA female, impedance: 50 ohm
Isolation to Power port 3 kVrms 50 Hz 1 min
Interface specification, SIM
Electrical specification 3 volts SIM supported
Isolation to Power port 3 kVrms 50 Hz 1 min

 

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