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MTL4854 Multi-modem Multiplexer HART Interfacing

Brand: MTL Instruments

For applications where communication paths with several field devices need to be established and maintained in parallel, the MTL4854 HART® multiplexer is the ideal product to use.

This is a module that has the same 32 channel capacity as the MTL4850 for connection to field devices but now has four HART modems rather than just one.

Essentially this gives 4 x 8 channel multiplexers in one compact housing, enabling simultaneous communication with several field devices through one serial link.

One particular use for this is during partial-stroke testing of valve positioners, where the ability to maintain access to other connected devices while the multiplexer would otherwise be locked enables plant monitoring to continue.
Features
  • Mount Directly to a Range of Customized Connection Units
  • MTL4850 Designed for Use with SIL3 Loops: Non-interfering
  • MTL4854 Designed for Use in Partial-stroke Test Valve Positioner Applications
  • Connect Over 2000 Loops on One RS485 Network
  • Auto Baud Rate Detection
  • LED Indication for Fault Diagnosis
  • Isolated Power Supply
  • Firmware Upgradeable

Specifications

Number of Channels

  • 32

Channel Transmitter Type

  • HART Rev 5 - 7
  • \

Channel Interface

  • 2 connections to each channel field loop (64 total)

Host System Interface

  • RS-485 2-Wire multidrop
  • Up to 63 MTL4850 modules can be connected to one host

RS-485 Baud Rate

  • 38400, 19200, 9600, 1200 baud
  • Auto-detected

Address Selection

  • 8-bit interface
  • Up to 64 addresses

Alarm Output

  • Vmax = 35 V
  • Imax = 5 mA
  • Pmax = 100 mW
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