Westermo Products

 

RS232 / RS485

PSTN, ISDN, ADSL, GSM, 3G, Wireless

 

Despite the dominance of Ethernet in modern industrial networks there is still a vast installed base of legacy serial equipment that is still in use.

Whether it is RS-232, RS-422/485, PROFIBUS, M-bus or even 20mA current loop,Westermo still offers a range of solutions.

 

 

RS-232, Point-to-point

The MD-12 is used in point-to-point applications or as a start and end modem in a multidrop installation with products using W1 technology.

Westermo’s ±10 mA balanced current loop (W1) transmission technique makes it possible to transmit data up to 18 km (11.2mi) at low data rates on a 4-wire cable. At shorter ranges transmission rates up to 38.4 kbit/s can be achieved.

 

RS-232, Repeater/Isolator

 

This unit are used to extend distances or to provide galvanic isolation between different equipment in installations where ground potentials may cause problems.
The MD-52 is used together with RS-232 equipment and the RD-48 with RS-422/485.

 

RS-232, Multidrop

Westermo’s ±10 mA balanced current loop (W1) transmission technique makes it possible to transmit data up to 18 km (11.2 mi) at low data rates on a 4-wire cable. At shorter ranges transmission rates up to 38.4 kbit/s can be achieved.
The LD-01 is also available in a ”by-pass” version. This model ensures that if a modem in the multidrop network should fail that modem will be by-passed, hence not effecting the communications between other units on the network.

 

RS-422/485, Repeater/Isolator

According to the standard the RS-422/485 interface is able to support a total of 32 connected devices and a transmission range of up to 1200 meters (4000 ft).
A repeater can be used to extend the range by an extra 1200 metres or to add another 32 connected devices. Up to 8 repeaters can be used in a single network.
The RD-48 can also allow star networks to be created, provide galvanic isolation between segments and correct termination of the line.

 

Short Haul modems	Point to Point, Multidrop and Multiplexer
Multidrop modems	Private & Leased Line Multidrop Modems
20mA Current loop	20mA to Serial Converters
RS-422/485 Converters and Repeaters	Repeaters & RS232 to RS284/422 Converters
RS-232/V.24 Isolators	Isolates Serial devices on different Earth Potentials
Protocol Converter	Serial Speed/Format Converter
Fieldbus	Serial link for Profibus DP networks
Modbus Adapter	Solutions for Modbus applications