Westermo MD-12 DC Temp Industrial Short Haul Modem | Easy World Automation

Westermo MD-12 DC Temp Industrial Short Haul Modem

  • 1x 10 mA tri-state balanced current loop up to 38.4 kbit/s
  • Short-haul modem, point-to-point
  • 1x RS-232 up to 38.4 kbit/s
  • Suitable for work in a wide range of temperatures

Description

The MD-12 is a short-haul modem allowing RS-232 systems to be connected over long distance. 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 totally 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 different power options, galvanic isolation, and transient protection guarantee communication in the worst 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.


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Specification

Interface
RS-232 1 x up to 38.4 kbit/s
10 mA tri-state balanced current loop 1 x up to 38.4 kbit/s
Power Requirements
Operating voltage DC: 12 to 36 V, AC: 230 V (+15% –10%
Rated current DC: 65 mA @ 12 V, 40 mA @ 36 V, AC: 20 mA @ 230 V
Physical Characteristics
Dimension 55 x 100 x 132 mm (2.16 x 3.93 x 5.19 in)
Weight 0.4 kg
Degree of protection IP 20
Operating temperature 5 – 50ºC (41 – 122ºF)
EMC SS-EN 50081-1/SS-EN 55022 (1992): Class B, SS-EN 50082-2/SS-EN 61000-4-2 (1995): 4 kV CD, 8 kV AD, SS-EN 50082-2/SS-EN 61000-4-4 (1995): 4 kV power, 2 kV signals, SS-EN 50082-2/SS-ENV50140 (1993): 10 V/m, SS-EN 50082-2/SS-ENV50141 (1994): 10 V/m, SS-EN 50082-2/SS-ENV50204 (1995): 10 V/m
Safety EN 60950 (1992)