GSM modem with 485 serial support

GDW-11 485

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.

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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.

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Technical Data GDW-11 485

GDW-11 485

Product description
StatusActive
Article number3615-0030
Ports1 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.
DescriptionGSM modem, GSM / GPRS
Warranty period5 Years
Standard compliance
R&TTEArticle 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, operatingOperating, 10 year
EMC (Electromagnetic Compatibility)
EN 61000-6-2Immunity industrial environments
EN 55024Immunity IT equipment
EN 61000-6-3Emission residential environments
FCC part 15Class B
EN 50121-4Railway signalling and telecommunications apparatus
IEC 62236-4Railway signalling and telecommunications apparatus
EMC specifications
EN 61000-4-2, ESDEnclosure contact, ± 6 kV
Enclosure air, ± 8 kV
IEC 61000-4-3, RF field AM modulatedEnclosure, 20 V/m 80% AM (1 kHz), 80 – 2000 MHz
ENV 50204, RF field 900 MHzEnclosure, 20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
EN 61000-4-4, fast transientsSignal ports, ± 2 kV
Power ports, ± 2 kV
EN 61000-4-5, surgeSignal 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 immunitySignal 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 fieldEnclosure, 100 A/m, 50 Hz, 16.7 Hz & 0 Hz
EN 61000-4-9, pulsed magnetic fieldEnclosure, 1000 A/m, 6.4 / 16 ms 5 pos/5neg pulse in XYZ direction
EN 61000-4-11, Voltage dips and interruptionAC 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 HzSignal ports, 100 V 50 Hz line to earth
SS 436 15 03, Mains freq. 50 HzSignal ports, 250 V 50 Hz line to line
EN 61000-4-29, voltage dips and interruptionDC power ports:
10 & 100 ms, interruption
10 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
EN 55022, radiated RF emissionEnclosure, class B
FCC part 15, radiated RF emissionEnclosure, class B
EN 55022, conducted emissionAC power ports, class B
DC power ports, class B
FCC part 15, conducted emissionAC power ports, class B
Safety
SafetyEN 60950, IT equipment
EN 60950-1, dielectric strengthSignal 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, operating5 to 95% relative humidity
Humidity, storage5 to 95% relative humidity
Enclosure
EnclosureUL 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)
Weight0.2 kg
Degree of protectionIP 21
CoolingConvection
MountingHorizontal on 35 mm DIN-rail
Mechanical
IEC 60068-2-6, vibrationOperating
7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
IEC-60068-2-27, shockOperating, 15 g, 11 ms
Interface specifications, power
Rated voltage12 to 48 VDC
Operating voltage10 to 60 VDC
Rated current350 mA @ 12 VDC
150 mA @ 24 VDC
75 mA @ 48 VDC
Rated frequencyDC
Inrush current0.05A2s
Startup current0.75A peak
PolarityReverse polarity protected
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm2 (AWG 24-12)
Isolation toAll other ports 3 kVrms 50 Hz 1 min
Shielded cableNot required
Interface specifications, RS-232
Electrical specificationRS-232 V.24
Data rate300 bit/s – 115.2 kbit/s
Data format7 or 8 data bits, Odd, even or no parity, 1 or 2 stop bits
ProtocolTransparent
RetimingYes
Transmission range15 m / 49 ft
Isolation toPower port 3 kVrms 50 Hz 1 min
Connection9-pin D-sub female (DCE) and 5 pos Detachable screw terminal (DCE)
Connector sizeDetachable screw terminal 0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cableNot required
Conductive housingIsolated to all other circuits
Interface specifications, RS-422/485
Electrical specificationEIA/TIA-485 ITU V.11
2-wire or 4-wire twisted pair
Data rate1 200 bit/s – 115.2 kbit/s
Data format7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits.
9-11 bit words
ProtocolTransparent
RetimingYes
Turning time<10 ms (half duplex)
Transmission range≤ 1200 m, depending on data rate and cable type (EIA RS-485)
Settings120 Ω termination and failsafe biasing 680 Ω
ProtectionInstallation Fault Tolerant (up to ±60 V)
Isolation toPower port 3 kVrms 50 Hz 1 min
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cableNot required
MiscellaneousDo not connect RS-232 and RS-422/485 simultaneously
Interface specifications, Antenna
Frequency bandsGSM900 TX 880 – 915 and RX 925 – 960 MHz
GSM1800 TX 1710 – 1785 and RX 1805 – 1880 MHz
Data rateCSD: up to 14.4 kbit/s, GPRS: up to 85.6 kbit/s
ConnectionSMA female, impedance: 50 ohm
Isolation toPower port 3 kVrms 50 Hz 1 min
Interface specification, SIM
Electrical specification3 volts SIM supported
Isolation toPower port 3 kVrms 50 Hz 1 min

Technical Data GDW-485 EX

GDW-11 485 EX

Product description
StatusActive
Article number3615-5030
Ports1 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.
DescriptionGSM modem, GSM / GPR
Warranty period5 Years
Approvals
Hazardous locationsEN 60079-0, Explosive atmospheres – General requirements
EN 60079-15, Explosive atmospheres – Construction, test and marking of type of protection "n" electrical apparatus
Standard compliance
R&TTEArticle 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, operatingOperating, 10 year
EMC (Electromagnetic Compatibility)
EN 61000-6-2Immunity industrial environments
EN 55024Immunity IT equipment
EN 61000-6-3Emission residential environments
FCC part 15Class B
EN 50121-4Railway signalling and telecommunications apparatus
IEC 62236-4Railway signalling and telecommunications apparatus
EMC specifications
EN 61000-4-2, ESDEnclosure contact, ± 6 kV
Enclosure air, ± 8 kV
IEC 61000-4-3, RF field AM modulatedEnclosure, 20 V/m 80% AM (1 kHz), 80 – 2000 MHz
ENV 50204, RF field 900 MHzEnclosure, 20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
EN 61000-4-4, fast transientsSignal ports, ± 2 kV
Power ports, ± 2 kV
EN 61000-4-5, surgeSignal 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 immunitySignal 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 fieldEnclosure, 100 A/m, 50 Hz, 16.7 Hz & 0 Hz
EN 61000-4-9, pulsed magnetic fieldEnclosure, 1000 A/m, 6.4 / 16 ms 5 pos/5neg pulse in XYZ direction
EN 61000-4-11, Voltage dips and interruptionAC 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 HzSignal ports, 100 V 50 Hz line to earth
SS 436 15 03, Mains freq. 50 HzSignal ports, 250 V 50 Hz line to line
EN 61000-4-29, voltage dips and interruptionDC power ports:
10 & 100 ms, interruption
10 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
EN 55022, radiated RF emissionEnclosure, class B
FCC part 15, radiated RF emissionEnclosure, class B
EN 55022, conducted emissionAC power ports, class B
DC power ports, class B
FCC part 15, conducted emissionAC power ports, class B
Safety
SafetyEN 60950, IT equipment
EN 60950-1, dielectric strengthSignal 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)
Any port to any port and enclosure, 0,5 kVrms 50 Hz 1 min
Climatic
Temperature, operating–25 to +50°C (–13 to +122°F)
Temperature, storage–30 to +85°C (–22 to +185°F)
Maximum surface temperature135ºC (275ºF) (temperature class T4)
Humidity, operating5 to 95% relative humidity
Humidity, storage5 to 95% relative humidity
Enclosure
EnclosureCabelec 6141
Dimensions (W x H x D)34 x 123 x 121 mm (1.33 x 4.84 x 4.76)
Weight0.2 kg
Degree of protectionIP 21
CoolingConvection
MountingHorizontal on 35 mm DIN-rail
Mechanical
IEC 60068-2-6, vibrationOperating
7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
IEC-60068-2-27, shockOperating, 15 g, 11 ms
Interface specifications, power
Rated voltage12 to 48 VDC
Operating voltage10 to 60 VDC
Rated current350 mA @ 12 VDC
150 mA @ 24 VDC
75 mA @ 48 VDC
Rated frequencyDC
Inrush current0.05A2s
Startup current0.75A peak
PolarityReverse polarity protected
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm2 (AWG 24-12)
Isolation toAll other ports 3 kVrms 50 Hz 1 min
Shielded cableNot required
Interface specifications, RS-232
Electrical specificationRS-232 V.24
Data rate300 bit/s – 115.2 kbit/s
Data format7 or 8 data bits, Odd, even or no parity, 1 or 2 stop bits
ProtocolTransparent
RetimingYes
Transmission range15 m / 49 ft
Isolation toPower port 3 kVrms 50 Hz 1 min
Connection9-pin D-sub female (DCE) and 5 pos Detachable screw terminal (DCE)
Connector sizeDetachable screw terminal 0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cableNot required
Conductive housingIsolated to all other circuits
Interface specifications, RS-422/485
Electrical specificationEIA/TIA-485 ITU V.11
2-wire or 4-wire twisted pair
Data rate1 200 bit/s – 115.2 kbit/s
Data format7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits.
9-11 bit words
ProtocolTransparent
RetimingYes
Turning time<10 ms (half duplex)
Transmission range≤ 1200 m, depending on data rate and cable type (EIA RS-485)
Settings120 Ω termination and failsafe biasing 680 Ω
ProtectionInstallation Fault Tolerant (up to ±60 V)
Isolation toPower port 3 kVrms 50 Hz 1 min
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cableNot required
MiscellaneousDo not connect RS-232 and RS-422/485 simultaneously
Interface specifications, Antenna
Frequency bandsGSM900 TX 880 – 915 and RX 925 – 960 MHz
GSM1800 TX 1710 – 1785 and RX 1805 – 1880 MHz
Data rateCSD: up to 14.4 kbit/s, GPRS: up to 85.6 kbit/s
ConnectionSMA female, impedance: 50 ohm
Isolation toPower port 3 kVrms 50 Hz 1 min
Interface specification, SIM
Electrical specification3 volts SIM supported
Isolation toPower port 3 kVrms 50 Hz 1 min

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GSM modem with 485 serial support

GDW-11 485