MTL Intrinsic Safety
Barriers - Surge protectors
Remote PC Terminals
Fieldbus Terminations
The MTL Instruments Group plc is recognised as a world leader in the development and supply of intrinsic safety
explosion protection devices and specialises in lightning protection, surge protection and gas analysis equipment.
Many of the worlds safety-critical processes are monitored, controlled or protected by MTL products and the Group
is distinguished by its global network of sales and support centers and by its acknowledged position as thought
leader in this high technology marketplace.
MTL - Relcom
Fieldbus Products
Fieldbus

The fieldbus system by the very nature of the environment in which it will be placed, is at risk
from surges across the fieldbus system. Because the fieldbus system is controlling and
handling the data transactions across a common trunk, the importance of safeguarding the
integrity of the fieldbus system is paramount in order that the shutdown of multiple processes
does not occur. These fieldbus solutions can be applied without impacting the length of the
fieldbus run or the number of devices.

MTL surge protection devices supply complete fieldbus protection, whether for AC power,
transmitter or trunk protection - MTL Surge Technologies supplies that power protection
FP32 devices provide surge protection along the Trunk or Spurs of
fieldbus systems from damaging the associated electronics such as
terminators, spur blocks and the bus control equipment. Fully
automatic, the FP32 reacts immediately to ensure that equipment is
never exposed to damaging surges by directing surges safely to earth
and then resets automatically. Its small footprint also allows the FP32
to be located near terminators and spur blocks.
This page is to show some of MTL products.  
To see MTL's extensive line of products
please click any logo on right.
EXPLORER 15i PANEL PC

Intrinsically safe 15" TFT display
with modularly configurable
PANEL PC  
Brightness: 250- or 650 cd/m2
XGA solution (1024 x 768)

EXPLORER 18i PANEL PC

Intrinsically safe 19" TFT display
with modularly configurable
PANEL PC  
Brightness: 250- or 650 cd/m2
SXGA solution (1280 x 1024)

16.7 million colours
Contrast 250:1 (typ.)
Wide viewing angle (160°)
Longlife CCFL backlights
Temperature range: Typ. - 20°C...+
50°C, extendable to - 30°C
Ingress protection: IP 66 (Nema
4X)

PC FEATURES    
Processor: Pentium M technology
1.6 GHz  
RAM: 512 / 1024 MB
HDD: 60GB / Up to 4x 2-4GB Flash
Cards  
Power Supply: 100-240V AC wide
range, 50-60 Hz, 75 W (24V DC
optionally)
MTBF backlights: Typ. 50000 h
(depending on temperature)
OPTIONS: High Brightness
Display / Touch Screen  /
Brightness Sensor (automatically  
or manually) / Emergency Stop /
USB WLAN / USB Bluetooth / USB
Memory stick / USB Key / USB
Docking station

CONNECTIONS

Ethernet on board, 10/100 Mbit  Ex
e
4x USB Ex i  (intrinsically safe)   
1x USB Ex e
2x RS232 Ex i (intrinsically safe)  
1x RS232 Ex e  OR  RS422 Ex e  
OR  RS485 Ex e  
To PS/2 keyboard/mouse directly
Ex i
CHALLENGER PC terminals only
need to be connected to the
mouse, keyboard and VGA
connections on the controlling
computer in order to realize
intrinsically safe data transfer via
the transmission unit TCV2i.
Without software and hardware
adjustments being necessary,
bright process pictures can
immediately be visualized on the
CHALLENGER terminal on site.
Based on our CHALLENGER
philosophy of "modular
components" it is possible to
configure the PC terminal required
for each individual production
plant. With additional OPTIONS
such as RS 232 interface, barcode
scanner, video camera, etc., each
CHALLENGER terminal is
upgradable to a universal
operating station.
Product Features

Intrinsically safe PC terminals for
Ex Zone 1 / Zone 2
Modular principle incorporating
the most diverse of components
Optional: card reader, touch
screen, interfaces,
barcode scanner, video camera,
emergency stop switch...
Variable options for mounting on
the floor, wall and ceiling
Applications Features Protection
classes / certificates
Ex Zone 1/2
Pharmacy
Chemistry
Life Science
Oil & Gas
Incineration plants  
Alcohol processing
Food
...
Intrinsically safe PC terminals for
Ex Zone 1 / Zone 2
Modular principle incorporating the
most diverse of components
Optional: card reader, touch screen,
interfaces, scanner, camera,
emergency stop swith...
Variable options for mounting on the
floor, wall, ceiling  
Environmental temperature from
-30°C up to +60°C
Protection class  II 2G EEx ib IIC T4
Protection IP66 on front (Nema 4x)  
GOST-R+GGTN
UL / C-UL
ATEX
TIIS
FTZU
IECEx
MTL 5000 series
isolators