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Westermo LD-02 DC Industrial Line Sharing Modem

Westermo LD-02 DC Industrial Line Sharing Modem
Westermo LD-02 DC Industrial Line Sharing Modem
Westermo LD-02 DC Industrial Line Sharing Modem
Westermo LD-02 DC Industrial Line Sharing Modem
Westermo LD-02 DC Industrial Line Sharing Modem

  • 1 x 10 mA tri-state balanced current loop (up to 38.4 kbit/s)
  • 1 x RS-232 Port (up to 38.4 kbit/s, 9 pin D-sub female)
  • 1 x RS-422/485 Port (up to 38.4 kbit/s, 5-pos screw terminal)
  • Purpose-built DIN rail casing with integral clip
  • 12-36 VDC input power (with Galvanic isolation)
  • +5 to +50ºC operating temperature range

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Datasheet User Manual
  • Operating Temperature (5 to 55°C)
  • Relative Humidity (0 to 95% RH, non-condensing)
  • IP protection (IP20)
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Tags: Modems , Multidrop Modems , Line Sharing Modems , Industrial Data Communications , Industrial Modems , Westermo LD-02

The LD-02 is a line split modem allowing RS-232 or RS-422/RS-485 systems to be connected. The LD-02 is designed to be used in multidrop applications over long distances using the repeater functionality, serial connection can be either RS-232 or RS-422/485. The connection between the modems is W1 a balanced current loop interface allowing distances up to 18 km (11.18 mi). DIP switches are used for configuration options which make the unit simple to install. The serial interface is connected through a standard 9 pol D-sub or terminal block with screw connectors.

The LD-01 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 LD-01 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 line split modem makes the LD-01 suitable for a variety of applications with various speeds and data bit options. The V and Y mode emulate half or full duplex communication between master and slaves and a bypass board can be fitted to ensure networks can’t be broken by power failure at a single point.


End of Life Product - No Replacement

Please note that the LD-02 has been phased out. You can explore other types of modems in the Modems.


Inquire about the Westermo LD-02 DC Industrial Line Sharing 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 pin D-sub female), 1 x RS-422/485 Port (up to 38.4 kbit/s, 5-pos screw terminal), 1x 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 PWR, RD, TD, DCD2, DCD3
MTBF -
Operating mode Line Sharing 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 2 position screw-terminal
Power Consumption (Output Adapter) Max 3W
Input Voltage 12-36 VDC (Operating voltage)
POE Support No
Input Current 80 mA @ 24 VDC
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: 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 50082-1/SS-EN 61000-4-3 (1996): 3 V/m, SS-EN 50082-1/SS-ENV 50204 (1995): 3 V/m, SS-EN 50082-1/SS-EN 61000-4-6 (1996) 3 V/m; Safety: EN 60950:1992/A1,1993; A2,1993; A3,1995

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