Eaton MTL Triconex 4850 HART multiplexer

INTRODUCTION

This instruction manual describes the procedures for installing, checking

and maintaining the Triconex 4850 HART Multiplexer, which is a hardware

module located between ‘smart’ devices in the field and their host, that

provides an interface to HART instrument management software running

on a PC.

DESCRIPTION

The Triconex 4850 HART Multiplexer – also called the Triconex 4850 – 

enables a user to calibrate, configure and maintain an entire network of

‘smart’ field devices from a single workstation. It can multiplex up to 32

individual field devices, making each one addressable and identifiable.

The multiplexer mounts directly onto either a Tricon (Interface) card or a

Trident backplane, which provides the connections via the Field Termination

assembles to the Analogue Input or Output field devices.

It has a compact 100 pin, plug-in style connector in its base that ensures

a quick and easy installation method onto the Triconex Systems.

The HART instrument management system is organised in multiples of 32.

The Triconex 4850s are multidropped on an RS485 network that finally

connects, via an RS485 to RS232 converter, to the management PC. 

Depending upon the management software running on the PC, up to 31 of

the Triconex 4850s could be connected to it, making a potential overall field

device count of 992.

For intrinsically safe applications, consideration must be given to the safety

parameters for each loop. For further information, please refer to Eaton’s

MTL product line.

Safe or hazardous area applications

The Triconex 4850 HART Multiplexer can be used to monitor and maintain

field devices that are located in a safe or a hazardous areas.

For safe areas, the standard Tricon FTA’s and the Trident baseplates provide

the necessary terminals to connect upto 32 field devices.

Hazardous-area field devices can be handled through backplane mounting,

IS isolating interfaces. Both Trident and Tricon have integrated IS solutions

for both AI and AO IS field devices.

For full information refer to the Triconex P&I guides.

Connection methods

The Triconex 4850 HART Multiplexer will mount directly to either

a) a Tricon Interface card or

b) a Trident AI or AO Backplate