Category: Eaton

• For Foundation™ fieldbus networks in hazardous areas

• Pre-assembled system components for up to 5 intrinsically

safe spur connections

• For assembly into user-specified field enclosure

• Spurs compatible with FISCO and “Entity-certified”

fieldbus instruments

• Ergonomic mechanical design

• Pluggable system components without “gas free” constraints

• Optional, integrated surge protection for trunk and spurs

The 9387-FB-R (5-spur) Open-frame redundant fieldbus barrier

provides intrinsically safe spur connections from a high-energy trunk, for

connection to suitably certified Foundation™ fieldbus H1 instruments.

The unit comprises pre-wired and assembled system components on

a stainless steel baseplate, for installation into a suitably certified field

enclosure. Connection facilities are provided for the trunk and spur

wiring, as well as all electronic modules needed to support a fully

working Fieldbus Barrier. In a typical application, an Ex e (increased

safety) certified field enclosure will be selected to allow installation

in a Zone 1 hazardous area; third-party approval of the enclosure and

contents is normally required.

• For Foundation™ fieldbus networks in

hazardous areas

• Pre-assembled system components

for 6 or 12 intrinsically safe spur

connections

• For assembly into user-specified field

enclosures

• Spurs compatible with FISCO and

“Entity-certified” fieldbus instruments

• Ergonomic mechanical design

• Pluggable system components

without “gas free” constraints

• Optional, integrated surge protection

for trunk and spurs

The 9387-FB (6-spur) and 9388-FB (12

spur) Fieldbus Barrier assemblies provide

intrinsically safe spur connections from a

high-energy trunk, for connection to

suitably certified Foundation™ fieldbus H1

instruments. Each unit comprises pre-wired

and assembled system components on a

stainless steel baseplate, for installation into

a suitably certified field enclosure. Connection

facilities are provided for the trunk and spur

wiring, as well as all electronic modules

needed to support a fully-working Fieldbus

Barrier. In a typical application, an Ex e

(increased safety) certified field enclosure will

be selected to allow installation in a Zone 1

hazardous area; third-party approval of the

enclosure and contents is normally required.

Alternative uses include applications that are

not satisfied by the 9370-FB Series Fieldbus

Barriers in standard enclosures, such as the

installation of multiple fieldbus segments

inside a single field enclosure.

Each intrinsically safe spur is capable

of supporting a FISCO or ‘Entity’ certified

fieldbus device located in a Zone 0 or 1

hazardous area. The short-circuit protected

spurs are galvanically isolated from the trunk

and require no protective ground connection

in the field. The units are bus powered and

require no additional power supply in the

field. When used with a fieldbus host control

system, power for the trunk may be provided

by MTL power supplies in redundant or non

redundant format.

The 9387-FB and 9388-FB share the unique

features of MTL’s class-leading 9370-FB

Series Fieldbus Barrier system. The key

modular components of the system (Fieldbus

Barrier, Terminator and Surge Protectors) may

be ‘hot-plugged’ by design and without gas

clearance procedures or separate isolating

switches. This virtually eliminates the risk

associated with hazardous area maintenance

activities, speeds module replacement

and avoids the need for specialist operator

training. Optional features include pluggable

surge protection components for the fieldbus

trunk and individual spurs.

The fieldbus barrier is mounted in a 316L stainless steel,

increased safety, Ex e enclosure that segregates spur and

trunk cabling in accordance with hazardous area certification.

Inside the enclosure, the incoming trunk wiring terminates

in a separate compartment containing increased safety (Ex

e) trunk wiring terminals. This compartment has a protective

cover to deter interference, and carries a warning to the user

not to work on trunk wiring without first isolating the power.

A fieldbus terminator is included for the trunk wiring to ensure

correct termination of the wiring and prevent unwanted

reflections and signal disturbances.

The system described in this manual provides 12 spurs of

“simplex” type – meaning they are not intended to provide

redundancy between spurs. Each spur is short circuit

protected, so that other devices continue to operate in the

presence of field wiring faults.

The stainless steel enclosure may be installed in a

Zone 1. Zone 2. Zone 21 or Zone 22 hazardous area; in which

case, the trunk wiring must be implemented using suitably

protected cable. It provides excellent chemical and moisture

resistance and is suitable for use in a wide range of corrosive

environments.

The 9373-FB3 fieldbus barrier enclosure is

bus-powered and requires no additional power supply in the

field. When used with a fieldbus host control system, power

for the trunk MUST be provided only by a supply conforming to

IEC 61158-2. e.g. MTL F800 or MTL 918x range of redundant

power supplies.

The enclosure is supplied pre–drilled for all trunk and

spur cable entries and internal trunking provides adequate

separation between the trunk and spur cables. It is also fitted

with Ex eb tb certified blanking plugs and a breather.

• For Foundation™ fieldbus networks in hazardous areas

• Complete enclosure systems for 12 intrinsically safe spur connections

• Mount in Zone 1 (gas) or 21 (dust) with spurs connected into Zone 0

• Compatible with FISCO and Entity-certified fieldbus instruments

• Compact, modular construction

• Ergonomic mechanical design

• Pluggable system components, without ‘gas free’ constraints

• Optional, integrated surge protection for trunk and spurs

• Optional, integrated Isolation Switch for Trunk

The 9373-FB3 is a third-generation product, in a successful

range of Eaton Fieldbus Barrier Systems.  The field-mounted

enclosure contains a barrier that receives power and

FOUNDATIONTM fieldbus H1 communications via a non

intrinsically safe trunk and converts this to a number of

galvanically isolated, intrinsically safe, spur connections.

The trunk terminals are implemented as increased safety

(Ex e) and the spur terminals as intrinsically safe (Ex ia) for

connection to IS fieldbus instruments in IIC, Zone 0 hazardous

areas.  The spur connections are compatible with both FISCO

and Entity-certified field instruments.

MTL4546S ISOLATING DRIVER

for 4–20mA HART® valve positioners with line fault detection and long field lines

The MTL4546S accepts a 4/20mA floating signal from a safe-area

controller to drive a current/pressure converter (or any other load up to

710Ω) in a hazardous area. For HART valve positioners, the module also

permits bi-directional transmission of digital communication signals.

Process controllers with a readback facility can detect open circuits in

the field wiring: if these occur, the current taken into the terminals drops

to a preset level. The reduced maximum open-circuit voltage permits

the use of longer field lines compared to MTL4546

SPECIFICATION

See also common specification

Number of channels

One

Location of I/P converter

Zone 0. IIC, T4–6 hazardous area if suitably certified

Div. 1. Group A, hazardous location

Working range

4 to 20mA

Digital signal bandwidth

500Hz to 10kHz

Maximum load resistance

710Ω (14.2V at 20mA)

Minimum load resistance

90Ω

Output resistance

> 1MΩ

Under/over range capability

Under range = 1mA

Over range = 24mA (load ≤ 520Ω)

Input and output circuit ripple

< 40µA peak-to-peak

MTL4546/C/Y – MTL5546/Y ISOLATING DRIVER

for 4–20mA HART® valve positioners with line fault detection

The MTLx546 accepts a 4/20mA floating signal from a safe-area controller

to drive a current/pressure converter (or any other load up to 800Ω) in a

hazardous area. For HART valve positioners, the module also permits

bi-directional transmission of digital communication signals. Process

controllers with a readback facility can detect open or short circuits in

the field wiring: if these occur, the current taken into the terminals drops

to a preset level. The MTL4546C and the MTLx546Y are very similar

to the MTLx546 except that they provide open circuit detection only

(i.e. no short-circuit detection).

Operation and configuration

LED indicator functions

The EAFR-101C contains 16 indication LEDs .  A user definable text

pocket can be slid in under the label for identifying each LED func

tion (except POWER and ERROR LEDs) .  LEDs are located at the

front plate of the relay for clear viewing without a need for opening

doors .

During power up, the relay performs an LED test .  All LEDs are

turned on for two seconds and then off .  Only the blue POWER LED

will remain on .  After powered up, the relay goes into protection

mode in 50 ms even while the LED test is being performed .

During normal operation, the blue power LED is ON, as are any CB

open/close status LED’s for connected CB’s .

The sensor LEDs are off during the inactive condition .  If  a point arc

sensor is activated, the corresponding sensor channel LED will turn

on if the activation is longer than 1 .5 ms .  The sensor LED activation

function is latched (steady light) .  To clear the LED, the “SET” button

should be pressed .

In case of a loose sensor wire and binary input wires or configura

tion mismatch (new sensor attached without running auto-configu

ration system setup (see Section 3 .3 .1) situation, the corresponding

LED for that sensor will start flashing and the ERROR LED will

activate .

The Binary I/O LEDs indicate the I/O-line status .  If any of the lines

become active for more than 1 .5 ms, the corresponding LED will

turn on (latch) .

In a trip situation, the corresponding trip LED will turn on .  Trip

outputs are controlled by the dipswitch settings (see Section  3 .5) .

All activation and trip indication LEDs are latched, even if the

dipswitch setting is in the non-latched mode .  They have to be

cleared by pushing the “SET” button .

LED indications are stored in non-volatile EPROM memory for iden

tifying the trip information in case the auxiliary power is lost .  When

re-powering the relay after power supply loss, the actual LED status

can be visualized from the front of the relay

EAFR-101C features

The EAFR-101C is a multipurpose arc flash protection relay that can

receive light from four different channels of light point sensors and

can be applied for variety of applications .  The EAFR-101C can be

used as a stand-alone relay or as part of a more complex arc protec

tion system through the binary bus .

Main features of EAFR-101C:

• (110-220) Vac / (125-250) Vdc  auxiliary  power  supply;

• (18-72) Vdc optional power supply;

• Four arc point sensor channels (S1. S2. S3. and S4);

• Six binary inputs (BI1. BI2. BI3. BI4. BI5. and BI6) nominal voltage

of 24 Vdc;

• Three normally open trip relay outputs with direct trip circuit rated

contacts (T1. T2. and T3);

• One normally open electronic lock-out trip relay with direct trip

circuit rated contacts (T2);

• Two 24 Vdc binary outputs (BO1 and BO2);

• One system failure relay, form C output (SF);

• 16 indication LEDs; and

• One push-button (SET)

General

The Eaton arc flash relay 101C (EAFR-101C) is a sophisticated

micro-processor based arc flash protection relay including complete

self-supervision functionality .  It is designed to minimize the damage

caused by an arcing fault (arc flash) by sensing light from the point

sensor and acting to trip the circuit breaker sourcing the fault

current .  The EAFR-101C complete system self-supervision function

provides the highest level of dependability by continuously monitor

ing all internal system functions along with external connections .

The EAFR-101C is designed according to the latest protection relay

standards and is therefore suitable for installations in rough environ

ments, such as utility, traditional or renewable power plants, off

shore, marine, oil and gas, mining, steel, or any other heavy industry

applications .  It is also well suited for commercial and institutional

electrical systems .  The EAFR-101C is suitable for either medium

voltage or low voltage switchgear and motor control center applica

tions in both new and retrofit installations .