The document describes GM International's new HART Interface System, which provides a cost-effective solution for connecting HART field devices. The system reduces the number of required multiplexer modules from 465 to just 31 while still supporting up to 7936 channels. This significantly lowers costs and stock requirements compared to other HART systems on the market. The system also offers improved performance with a baud rate of 115.200 bps.

1. HART MULTIPLEXER SYSTEM

2. The cost-effective HART
Interface Solution for IS and
Non-IS signals
Series TB-D5001-HRT

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Safety, performance and reliability
OUR PRODUCTS, OUR PROMISE
Company
profile
GM International (former Elcon Instruments) designs, engineers and manufactures a complete
range of Intrinsically Safe products and SIL devices for Oil and Gas, Petrochemical,
Pharmaceutical, Mining and Food Industry worldwide since 1993.
QUALITY AND INNOVATION
Our goal is to guarantee the highest standards of quality: all products conform
to the most severe specifications worldwide. Over 20% of our employees are
dedicated to research and development for the innovation of our products.

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SOCIAL RESPONSIBILITY
We design Intrinsically Safe Instruments certified up to SIL 3 in order to prevent accidents and
understand, manage and reduce risks for people and environment. The satisfaction of our
customers is the way in which we demonstrate our social responsibility to contribute for a
sustainable development, minimizing the impact on climate, and creating a safe and healthy
working environment.
 100% Made in Italy
 State-of-Art technology
 Product traceability
 Full testing on 100% of production
 Highly automated manufacturing process
Manufacturing excellence
FOR A SAFE WORLD
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Functional Safety Services
YOUR SAFETY EXPERTS
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profile
SIL VERIFICATION
We verify the capability of Safety Instrumented Functions in
accordance with IEC 61508 and IEC 61511 by quantifying the
effects of random hardware failures such as PFD or Frequency
of Dangerous Failures (PFH), calculating the hardware safety
integrity architectural constraints including Safe Failure Fraction
(SFF), Hardware Fault Tolerance (HFT) and Common Cause
Failure (CCF).
QUANTITIVE RISK ASSESSMENTS
Our experts have delivered numerous QRA projects using our
QRA Life Cycle methodology which have contained many
different activities.
SAFETY REQUIREMENTS SPECIFICATIONS
Our experts compile conceptual and detailed Safety
Requirements Specifications to meet IEC 61511 requirements.
FUNCTIONAL SAFETY MANAGEMENT
This relates to how functional safety requirements and procedures
are implemented during a project. We provide assistance or
create and maintain in its entirety, the Functional Safety Lifecycle
and Management requirements for clients in accordance with IEC
61511.
PROCESS HAZARD ASSESSMENTS
Our certified independent expert facilitators will perform the
necessary preparation activities, then chair and deliver the
appropriate reporting for the qualitative PHA activities including:
HAZID, HAZAN, HAZOP, CHAZOP and FMEA.
FUNCTIONAL SAFETY ASSESSMENTS
Independent functional safety assessments are conducted by our
experts to advise if functional safety and safety integrity have
been achieved by the Safety Instrumented System in accordance
with IEC61508.

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Think local, act global
WORLDWIDE PRESENCE
TRAINING AND DEVELOPMENT
GM International is course promoter of the TÜV Rheinland Functional Safety
Program for Safety Instrumented Systems. We provide courses on Intrinsic Safety
and SIL levels of Safety Instrumented System based on our own manual. All
courses are held by Tino Vande Capelle, Functional Safety Senior Expert & Trainer.
 7 Direct Subsidiaries Worldwide
 58 Local Authorized Distributors
 200 Total Staff around the world
 10% of turnover reinvested in Research and
Development, Testing and Certifications
 18 Courses per year on Functional Safety for
Engineers all around the world
Company
profile

7. A P P R O V A L
P E N D I N G
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Cost-effective HART Interface SystemHART
Multiplexer
System
The new HART Interface System by G.M. International provides the possibility to drastically reduce
the number of multiplexer modules, yet maintain the capability to control up to 7936 channels.
By splitting modem and multiplexing units it is possible to reduce costs for modules, increasing the
baud rate of the system at the same time.
BENEFITS AT GLANCE:
 Reduced cost and stock
 Less wiring
 Improved baud rate
 Certified for SIL 3 applications

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System overview - ExamplesHART
Multiplexer
System
Up to 31 Multiplexer Systems
1 31
64 channels
TB-D5001-HRT-003 TB-D5001-HRT-003TB-D5001-HRT-003
TB-D5001-HRT-004
Non-IS Signal
(for IS Signal, with DIN-Rail mounted isolators)
IS Signal
Termination board mounted isolators
HART
MANAGEMENT
SYSTEM
DISTRIBUTED
CONTROL SYSTEM
GM5700
TB-D5001-HRT-003
GM5700
TB-D5001-HRT-004
Up to 32 AI/ AO
field devices
Generic GMI
Termination Board
64 channels 64 channels 64 channels
1616 16
Up to 16 AI/ AO
field devices
16
GM5700

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TB-D5001-HRT-003
SYSTEM DETAILS
HART
Multiplexer
System
Through integration of multiplexing units into the
Termination Board, the GMI HART System only
requires 1 multiplexer module to control 256
Channels
64 channels
GM5700
TB-D5001-HRT-003 TB-D5001-HRT-003 TB-D5001-HRT-003TB-D5001-HRT-003
Generic GMI
Termination Board
64 channels 64 channels 64 channels
HART
MANAGEMENT
SYSTEM
1616 16 16
 Multiplexing units integrated into
the Termination Board TB-D5001-
HRT-003
 No master + slave modules
required - Multiplexer modules
GM5700 are used as HART signal
transmitters
 Each GM5700 supports 256
channels
 Up to four TB-D5001-HRT-003 can
be inter-connected using a single
GM 5700 Multiplexer
 7936 maximum number of
channels

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TB-D5001-HRT-004
SYSTEM DETAILS
HART
Multiplexer
System
It is possible to connect the system to
Intrinsically Safe signals by using DIN-Rail
mounted isolators
 Multiplexing units integrated into
the Termination Board TB-D5001-
HRT-004
 No master+slave modules
required - Multiplexer modules
GM5700 are used as HART signal
transmitters
 Each GM5700 supports 256
channels
 It is possible to inter-connect up to
eight TB-D5001-004 using a single
GM 5700 Multiplexer
 7936 maximum number of
channels
TB-D5001-HRT-004
HART
MANAGEMENT
SYSTEM
GM5700
TB-D5001-HRT-004
Up to 32 AI/ AO
field devices
TB-D5001-HRT-004 TB-D5001-HRT-004
TB-D5001-HRT-004 TB-D5001-HRT-004 TB-D5001-HRT-004
TB-D5001-HRT-004

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ConfigurationsHART
Multiplexer
System
TB-D5001-HRT-004
Non-IS Signal
TB-D5001-HRT-004
IS Signal
with DIN-Rail mounted
barriers
GM5700
GM5700
GM5700
TB-D5001-HRT-003
IS Signal
with Termination Board
mounted barriers
GM5700
TB-D5001-HRT-003
Non-IS Signal
with Termination Board
mounted isolators
GM5700
TB-D5001-HRT-004
Non-IS Signal
with DIN-Rail mounted
isolators
The GM5700 multiplexer unit fits to all GMI HART Termination Boards, both for Intrinsically Safe and
Non-Intrinsically Safe signals.

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HART Systems - ComparisonHART
Multiplexer
System
Compared to the current State-of-Art HART interface solutions on the market, the GMI HART
System drastically cuts the number of multiplexer modules required. Even the baud rate is
increased: 115.200 bps instead of 38.400 bps of other HART systems on the market.
64 channels
1 to 31
Other generic TB
16
64 channels
xxxM
xxxSOther TB
xxxS
xxxS
Other TB Other TB Other TB
64 channels 64 channels
Other HART Interface Systems on the market
Other HART interface systems on the market require 496 isolator
barriers to manage 7936 channels
xxxS
xxxS
xxxS
xxxS
xxxM
xxxS
xxxS
xxxS
xxxS
xxxS
xxxS
xxxS
1616
16

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HART Systems - ComparisonHART
Multiplexer
System
The GM International HART
Multiplexer System allows you
to save 465 multiplexer
modules to manage 7936
channels without increasing the
number of required termination
boards.
Channels GM International
Other HART systems on the
market
Number of
GM5700
multiplexer
modules
Number of
TB-D5001-HRT-003
termination boards
Number of other multiplexer
modules
Master | Slave
Number of
termination
boards
32 1 1 1 1 1
64 1 1 1 3 1
128 1 2 1 7 2
256 1 4 1 15 4
992 4 16 4 58 16
1024 4 16 4 60 16
2016 8 32 8 118 32
2048 8 32 8 120 32
4096 16 64 16 240 64
7936 31 124 31 465 124
+
+
+
+
+
+
+
+
+
+

14. A P P R O V A L
P E N D I N G
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Smart innovationHART
Multiplexer
System
The new HART System Interface by GM International allows for
many advantages. In addition to increased system performance,
other benefits include:
 Reduced components: only 31 multiplexer modules GM5700
to control 7936 channels
 Less spare parts: stock is substantially reduced
 Wirings are reduced: less components, less cables, less
wirings
 Increased performances: 115.200 bps baud rate
 Certified for SIL 3 applications: our HART Multiplexer System
is suitable for SIL 3 applications according to IEC 61508 and
IEC 61511

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HART
Multiplexer
System

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