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Westermo MD-12 AC Industrial Short Haul Modem

Westermo MD-12 AC Industrial Short Haul Modem
Westermo MD-12 AC Industrial Short Haul Modem
Westermo MD-12 AC Industrial Short Haul Modem
Westermo MD-12 AC Industrial Short Haul Modem
Westermo MD-12 AC Industrial Short Haul Modem

  • Short Haul Point-to-Point Modem
  • 1 x 10 mA tri-state balanced current loop (up to 38.4 kbit/s)
  • 1 x RS-232 Serial port (up to 38.4 kbit/s, 9-polig D-sub female)
  • Up to 18 km Typical data transmission distance 
  • Purpose-built DIN rail casing with integral clip
  • 230 VAC input power range (with Galvanic isolation)
  • +5 to +50ºC operating temperature range

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Datasheet User Manual
  • Operating Temperature (5 to 50°C)
  • Relative Humidity (0 to 95% RH, non-condensing)
  • IP protection (IP20)
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Tags: Modems , Short Haul Modems , Industrial Short Haul Modems , Industrial Data Communications , Industrial Modems , Westermo MD-12

The MD-12 is a short-haul modem that allows RS-232 systems to be connected over long distances. The serial interface is a standard RS-232 interface with five control signals. The connection between the modems is a balanced current loop allowing distances up to 18 km. (11.18 mi) Since the communication is transparent no communication settings are necessary. The RS-232 serial interface is connected through a standard 9-pole D-sub or alternately through a terminal block with screw connectors.

The MD-12 is designed for use in heavy-duty industrial applications. The various power options, galvanic isolation, and transient protection ensure reliable communication in even the most challenging environments. The MD-12 has been tested to meet many EMC, isolation, vibration, and shock standards, all to the highest levels suitable for heavy industrial environments.

The design of the short-haul modem makes the MD-12 suitable for a variety of applications with various speeds and data bit options. DIP switches are used for configuration options of the control signals. One control signal can be transmitted in both directions.


You can also find the other types of modems in the Modems.


Inquire about the Westermo MD-12 AC Industrial Short Haul Modem, designed for industrial automation solutions. Feel free to get in touch with our sales team to give you the best solutions at the best global price in the Middle East (UAE (Dubai), KSA (Al Khobar, Riyadh), and Oman).

3g modem : Interface
SIM card slot No
Ethernet Ports No
USB No
Digital Input and Output No
Serial port Yes : 1 x RS-232 Serial port (up to 38.4 kbit/s, 9-polig D-sub female), 1 x 10 mA tri-state balanced current loop (up to 38.4 kbit/s)
Alert Output No
Band Options -
Cellular Standards -
Cellular Antenna Connectors No
WLAN Standards No
WLAN Antenna Connector No
GPS Antenna Connector No
3g modem : Radio specifications
Radio Connection type -
Maximum data transfer speed of 2G -
Maximum data transfer speed of 3G -
Maximum data transfer speed of 4G -
WiFi Radio Frequency -
3g modem : Software Specifications
Routing Redundancy -
VPN -
Firewall -
Time Management -
Management -
3g modem : General
LED Indicators Power, TD, RD, RTS, DCD
MTBF -
Operating mode Short Haul Modem
3g modem : Standards and protocols
Protocols -
3g modem : Features and capabilities
Send and receive SMS No
3g modem : Security
Security and Encryption No
Authentication No
3g modem : Power Requirements
Power Connector -
Power Consumption (Output Adapter) Max 4VA at 230V AC
Input Voltage 230 V (+15% –10%)
POE Support No
Input Current 20 mA @ 230 V
Reverse Polarity Protection No
3g modem : Buttons
Power button No
Reset No
3g modem : Physical Characteristics
Installation DIN-rail mounting
Dimensions 55 x 100 x 132 mm (2.16 x 3.93 x 5.19 in)
Housing -
Weight 0.4 kg
Operating Temperature +5 to +50ºC (+41 to +122°F)
Storage Humidity 5 to 95% RH, non-condensing
Storage Temperature -
Type of Use Industrial environment
Standards and Certifications Ingress protection: IP20; EMC: EN 61000-6-1, Electromagnetic compatibility – Immunity for residential environments, EN 61000-6-2, Electromagnetic compatibility – Immunity for industrial environments, EN 61000-6-3, Electromagnetic compatibility – Emission for residential environments, EN 61000-6-4, Electromagnetic compatibility – Emission for industrial environments; Safety: EN 60950 (1992)

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The MD-12 is a short-haul modem that allows RS-232 systems to be connected over long distances. The serial interface is a standard RS-232 interface wi..
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